For Transmission Patents (Class 440/86)
  • Patent number: 11059557
    Abstract: A marine outboard motor is provided with a gear casing, a propeller shaft rotatable within the gear casing about a propeller shaft axis, a drive shaft having a drive gear, a clutch mechanism for selectively engaging the drive gear with the propeller shaft and a shift mechanism configured to operate the clutch mechanism. The shift mechanism comprises a support shaft which is fixed relative to the gear casing and which extends along or parallel with the propeller shaft axis, a shift shuttle which is slidable along the support shaft and is connected to a clutch member of the clutch mechanism, a shift finger pivotally mounted on the support shaft, and a shift rod coupled to the shift finger by a releasable coupling. The shift finger is configured to move the shift shuttle along the support shaft to operate the clutch member.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: July 13, 2021
    Assignee: COX POWERTRAIN LIMITED
    Inventor: James Barratt
  • Patent number: 10894589
    Abstract: A ship maneuvering system includes first and second propulsion devices, a shift actuator, and a controller. The shift actuator switches a shift state of each of the propulsion devices. The controller causes the shift actuator of one of the first and second propulsion devices to execute intermittent control during low-speed navigation of the ship. The intermittent control intermittently switches the shift state to a shift-in state and a shift-out state.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: January 19, 2021
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Makoto Ito, Kohei Yamaguchi, Yuji Ikegaya
  • Patent number: 10597132
    Abstract: A ship including: an out-drive unit that exerts a propulsion force on a ship hull by power from an engine; a detection device for detecting a current position, a bow direction, and a moving speed of the ship hull; a shift lever that changes magnitude and direction of an output from the out-drive unit; a lever sensor that detects a manipulation position of the shift lever; and a ship steering control device that is connected to the out-drive unit, the detection device, and the lever sensor. The ship steering control device acquires the operating status of the out-drive unit and the detection results obtained by the detection device and the lever sensor and controls the out-drive unit based on the detection results. The ship steering control device performs a dynamic positioning control when the shift lever is in the positioning position.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: March 24, 2020
    Assignee: YANMAR CO., LTD.
    Inventors: Gakuji Tamura, Jun Watanabe
  • Patent number: 10359268
    Abstract: A stroke sensor includes: a shaft that extends in an axial line direction; a detected body that is fixed to the shaft; a housing that extends along the shaft, that houses the shaft, and that supports the shaft slidably in the axial line direction; and a detection body that detects a movement amount of the detected body which moves in accordance with sliding of the shaft, wherein the shaft includes a plurality of shaft members that are connected to each other in the axial line direction and that are formed of metal, and a slide part that is in contact with an inner wall of the housing and that slides so as to regulate a movement of the shaft in a direction that is crossed with the axial line is provided on each of the plurality of shaft members.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: July 23, 2019
    Assignees: NIPPON SEIKI CO., LTD., HONDA MOTOR CO., LTD.
    Inventors: Kota Ebina, Jun Morimoto, Norifumi Shimizu
  • Patent number: 10336426
    Abstract: A trim-tilt device includes a first electric motor electrically connected to a power source and tilts an outboard motor body in an up-and-down direction. A steering device includes a second electric motor electrically connected to the power source. The steering device turns the outboard motor body in a right-and-left direction. A fuel pump is electrically connected to the power source, and supplies fuel to an engine. A controller limits an inrush current into the first electric motor using a PWM control for a predetermined period of time from a starting time point of an input current into the first electric motor.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: July 2, 2019
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Takeshi Naito, Yoshihiro Mizushima, Kazuyuki Agemura, Makoto Mizutani, Takeshi Ohata, Makoto Ito
  • Patent number: 9726882
    Abstract: Optical system comprising a motor, an optical element, an optical detector, and a linkage that connects operation of the motor to movement of the optical element and the optical detector relative to one another. The linkage may include a shaft and a drive element that operatively connects the shaft to another part of the linkage. In some embodiments, the drive element may include a clamp having a base and a retainer that compressively secure the drive element to the shaft by engagement of a cylindrical surface region of the shaft with the base and engagement of a flat surface region of the shaft with the retainer. In some embodiments, the drive element may include a collar secured to the shaft with a fastener disposed in threaded engagement with a transverse hole defined by the shaft.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: August 8, 2017
    Assignee: FLIR Systems, Inc.
    Inventor: Kevin E. Jones
  • Patent number: 9533748
    Abstract: In an apparatus for controlling operation of an outboard motor having an internal combustion engine, a transmission and a low-speed cruise controller controlling a rotational speed of the propeller to make the boat cruise at low speed, the low-speed cruise controller outputs an increase/decrease command of the propeller rotational speed in response to an operator's manipulation, and change the gear position from the second speed to the first speed when the decrease command is outputted under a condition where the gear position is in the second speed and an engine speed is equal to or lower than a predetermined speed. With this, it becomes possible to decrease the propeller rotational speed to the maximum extent, thereby making a boat cruise at very low speed.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: January 3, 2017
    Assignee: Honda Motor Co., Ltd.
    Inventors: Koji Kuriyagawa, Hajime Yoshimura
  • Patent number: 9446829
    Abstract: A transmission is for an outboard marine engine. The transmission comprises a rotatable input shaft that is rotated by an internal combustion engine, a rotatable output shaft that powers a propulsor, a forward gear that causes forward rotation of the output shaft and propulsor, a reverse gear that causes reverse rotation of the output shaft and propulsor, a clutch that is movable between a forward clutch position wherein the forward gear causes the forward rotation of the output shaft and propulsor and a reverse clutch position wherein the reverse gear causes the reverse rotation of the output shaft and propulsor, and an internal ring gear that couples the output shaft to one of the forward gear and the reverse gear.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: September 20, 2016
    Assignee: Brunswick Corporation
    Inventors: Cameron Philip Williams, Jiri Jager
  • Patent number: 9422907
    Abstract: A start control device (20) for an outboard motor (40) has: a determination unit (64) determining whether or not an emergency switch (31) is on when a first switch is operated by a boat operator; a start instruction unit (65) instructing a start of the outboard motor (40) when the determination unit (64) determines that the emergency switch (31) is not on; and a stop instruction unit (66) instructing a stop of a supply of electric power to the outboard motor (40) when the determination unit (64) determines that the emergency switch (31) is on. It is possible to make a state where the electric power is supplied to the outboard motor (40) shift to a state where the supply of electric power to the outboard motor (40) is stopped without starting the outboard motor (40).
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: August 23, 2016
    Assignee: SUZUKI MOTOR CORPORATION
    Inventor: Yukihiro Yoshikawa
  • Patent number: 8961246
    Abstract: Systems and methods are for controlling shift in a marine propulsion device. A shift sensor outputs a position signal representing a current position of a shift linkage. A control circuit is programmed to identify an impending shift change when the position signal reaches a first threshold and an actual shift change when the position signal reaches a second threshold. The control circuit is programmed to enact a shift interrupt control strategy that facilitates the actual shift change when the position signal reaches the first threshold, and to actively modify the first threshold as a change in operation of the marine propulsion device occurs.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: February 24, 2015
    Assignee: Brunswick Corporation
    Inventors: Thomas S. Kirchhoff, David G. Camp
  • Patent number: 8858281
    Abstract: In an apparatus for controlling operation of an outboard motor having an internal combustion engine to power a propeller, and a transmission being selectively changeable in gear position to establish speeds including a first speed and a second speed and transmitting power of the engine to the propeller with a gear ratio determined by established speed, it is determined whether acceleration is instructed to the engine when the second speed is established and whether a preset condition is met, and operation of the transmission is controlled to change the gear position from the second speed to the first speed when the acceleration is determined to be instructed and the preset condition is met, thereby improving the acceleration performance of immediately after the acceleration is started.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: October 14, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Koji Kuriyagawa, Hajime Yoshimura
  • Patent number: 8851946
    Abstract: In an apparatus for controlling operation of an outboard motor having an internal combustion engine and transmission, it is configured to determine whether acceleration is instructed to the engine by an operator when the gear position is the second speed, detect a slip ratio of a propeller based on theoretical velocity and actual velocity of a boat, control a throttle opening to suppress increase in the slip ratio when the acceleration is determined to be instructed, and change the gear position from the second speed to the first speed when the slip ratio is equal to or less than a first predetermined value and the change amount of the slip ratio is equal to or less than a prescribed value. With this, it becomes possible to appropriately control operation of the engine and the transmission during acceleration, thereby improving the acceleration performance of immediately after acceleration start.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: October 7, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Koji Kuriyagawa, Hajime Yoshimura, Nobuchika Katagiri
  • Patent number: 8801477
    Abstract: In a control apparatus for an outboard motor having an internal combustion engine and a transmission adapted to establish speeds including first and second speeds and transmit an engine output to a propeller with an established speed, it is configured to determine whether acceleration is instructed to the engine by an operator when the second speed is established; detect an engine speed; detect a navigation acceleration indicative of a change amount of navigation speed per predetermined time; change the gear position from the second speed to the first speed when the acceleration is determined to be instructed; and change the gear position from the first speed to the second speed when the engine speed is at or above a predetermined speed and the navigation acceleration is at or below a predetermined value after the gear position is changed to the first speed.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: August 12, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Koji Kuriyagawa, Keiichi Nakayama
  • Patent number: 8764500
    Abstract: In an apparatus for controlling operation of an outboard motor having an engine to power a propeller, a transmission being selectively changeable in gear position to establish speeds including a first speed and second speed and transmitting power of the engine to the propeller with a gear ratio determined by established speed, and a trim angle regulation mechanism regulating a trim angle through trim-up/down operation, the transmission is controlled to change the gear position from the second speed to the first speed when the second speed is selected and a throttle opening change amount is at or above a predetermined value; and the trim angle regulation mechanism is operated to start the trim-up operation based on engine speed. With this, the transmission can be appropriately controlled to suppress the decrease in boat speed caused by change of gear position, thereby mitigating an unnatural feel given to the operator.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: July 1, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Koji Kuriyagawa, Hajime Yoshimura, Hiroshi Yamamoto, Nobuchika Katagiri, Masahide Shinokawa
  • Patent number: 8751075
    Abstract: An engine control strategy for a marine vessel propulsion system receives a request for a gear from among plural transmission gears, determines an engine speed for the requested transmission gear shift, adjusts the engine to the determined speed for a predetermined amount of time, and prevents the requested transmission gear shift from occurring for the predetermined amount of time while maintaining the engine at the predetermined speed. After the predetermined amount of time elapses, the requested shift is allowed to occur.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: June 10, 2014
    Assignee: Cummins Intellectual Properties, Inc.
    Inventors: Conor A. Leehaug, Joseph H. Scott, Andrew H. Bazan, Jiuzhu Yi
  • Patent number: 8740661
    Abstract: A marine propulsion device includes an engine, a propeller, a drive shaft, an exhaust path, a water intrusion detecting portion and a recording portion. The drive shaft is configured to transmit driving force from the engine to the propeller. The exhaust path allows exhaust air from the engine to pass therethrough. The water intrusion detecting portion is configured to detect a water intrusion potential indicating a possibility of water intrusion into the engine through the exhaust path. The recording portion is configured to record a detection result of the water intrusion detecting portion.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: June 3, 2014
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventor: Hiroshi Inoue
  • Patent number: 8690621
    Abstract: In an apparatus for controlling operation of an outboard motor having an internal combustion engine to power a propeller, and a transmission being selectively changeable in gear position to establish speeds including a first speed and a second speed and transmitting power of the engine to the propeller with a gear ratio determined by established speed, engine speed is detected, it is determined whether acceleration is instructed when the second speed is established, and operation of the transmission is controlled to change the gear position from the second speed to the first speed when the acceleration is determined to be instructed, and then change back the gear position from the first speed to the second speed based on the detected engine speed, thereby enabling to control the transmission optimally.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: April 8, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Koji Kuriyagawa, Hajime Yoshimura, Hiroshi Yamamoto, Nobuchika Katagiri
  • Patent number: 8688298
    Abstract: A boat propelling system capable of reducing electric power consumption includes an outboard engine main body, a swivel bracket arranged to allow the outboard engine main body to pivot in a right-left direction with respect to a hull, an electric motor arranged in the swivel bracket to pivot the outboard engine main body in the right-left direction, a transmission mechanism arranged in the swivel bracket to transmit a driving force of the electric motor to the outboard engine main body, a locking clutch arranged to lock the transmission mechanism so that the outboard engine main body will not be pivoted in the right-left direction by an external force acting on the outboard engine main body, a steering section arranged to steer the outboard engine main body, a steering angle sensor arranged to detect a steering angle of the steering section, a pivot sensor arranged to detect an actual pivot angle of the outboard engine main body, and an ECU arranged and programmed to control the electric motor based on a resu
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: April 1, 2014
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Makoto Mizutani, Ryuta Hayami
  • Patent number: 8574019
    Abstract: In an apparatus for controlling operation of an outboard motor having an internal combustion engine to power a propeller, and a transmission selectively changeable in gear position to establish speeds including at least a first speed and a second speed and transmitting power of the engine to the propeller with a gear ratio determined by established speed, it is configured to determine whether the transmission is in a reverse position, and control operation of the transmission to change the gear position from the second speed to the first speed when the second speed is selected and the transmission is determined to be in the reverse position. With this, it becomes possible to prevent the thrust of the boat from decreasing.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: November 5, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Koji Kuriyagawa, Hajime Yoshimura
  • Patent number: 8556668
    Abstract: In a hybrid type marine propulsion device including a main engine and a motor, low fuel consumption is realized by a compact configuration and highly efficient drive control. A marine propulsion device includes a clutch 7 provided on an input shaft 6 of a main engine, a horizontal input/output shaft 8 connected to the clutch, a vertical shaft 11 connected to the input/output shaft through an upper bevel gear 9, a horizontal propeller shaft 13 connected to a lower end of the vertical shaft through a lower bevel gear 12, and a propeller 14 at the other end side of the propeller shaft, in which the propeller is revolved around the vertical shaft to set a propulsion direction, wherein a motor generator 20 is mounted on a floor 3, and connected directly to the other end side of the input/output shaft. In a low rotation region, motor propulsion is performed, and in a high rotation region, hybrid propulsion in which the main engine is assisted by the motor is performed.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: October 15, 2013
    Assignee: Niigata Power Systems Co., Ltd.
    Inventors: Masanori Kodera, Yoshiki Nanke, Koichi Shiraishi, Yasuo Aizawa, Toshiyuki Saito
  • Patent number: 8515604
    Abstract: In an apparatus for controlling operation of an outboard motor having an internal combustion engine to power a propeller and a transmission being selectively changeable in gear position to establish speeds including a first speed and a second speed and transmitting power of the engine to the propeller with a gear ratio determined by established speed, a change amount of throttle opening and a change amount of manifold absolute pressure of the engine are detected, and operation of the transmission is controlled to change the gear position from the second speed to the first speed based on the change amounts of the throttle opening and manifold absolute pressure, thereby enabling to appropriately control the operation of the transmission to suppress the decrease in boat speed even when the resistance of water flow acting on a boat during cruising is increased due to influence of a wave, etc.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: August 20, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Koji Kuriyagawa, Hajime Yoshimura
  • Patent number: 8506337
    Abstract: A control device, in particular for a boat drive, which comprises a control drive, a reduction gear system (8, 11, 15/17) and a control element (2) that can be pivoted through a steering angle. The reduction gear system comprises a multi-stage toothed gear transmission (8, 11, 15/17) with a toothed wheel (10) on the drive input side, and the control drive comprises two servomotors (6) which drive the toothed wheel (10) simultaneously but whose driving action are slightly opposed to one another.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: August 13, 2013
    Assignee: ZF Friedrichshafen AG
    Inventors: Fernando Gallato, Adone Bertolo, Daniele Sacchi
  • Patent number: 8454402
    Abstract: Propulsion systems for marine vessels comprise an internal combustion engine rotating a driveshaft; an electric motor; a transmission selectively connecting the rotating driveshaft to a propulsor via a rotating gear; and a control circuit controlling the electric motor to slow rotation of the driveshaft and gear when a shift into the gear is requested.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: June 4, 2013
    Assignee: Brunswick Corporation
    Inventors: Jason S. Arbuckle, Aaron J. Ward, Matthew W. Snyder
  • Patent number: 8444446
    Abstract: In an apparatus for controlling operation of an outboard motor having an internal combustion engine, a transmission, and a trim angle regulation mechanism, where operation of the transmission is controlled to change the gear position from a second speed to a first speed when detected throttle change amount not less than a first predetermined value and operation of the trim angle regulation mechanism is controlled to start the trim-up operation such that the trim angle converges to a predetermined angle, the operation of the trim angle regulation mechanism is controlled such that the trim angle is decreased based on the detected rudder angle when steering of the outboard motor is started, thereby enabling to appropriately prevent cavitation caused by steering of the outboard motor, so that the boat can be smoothly turned.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: May 21, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Koji Kuriyagawa, Hajime Yoshimura
  • Patent number: 8388390
    Abstract: In an apparatus for controlling operation of an outboard motor having an internal combustion engine, transmission and trim angle regulation mechanism, it is configured to change a gear position to the first speed when the gear position is in the second speed and a throttle opening change amount is at or above a predetermined value, start trim-up operation when the engine speed is at or above a first predetermined speed after the gear position is changed to the first speed, change the gear position from the first speed to the second speed when the engine speed is at or above a second predetermined speed after the trim-up operation is started, and stop the trim-up operation after the gear position is changed to the second speed. It can mitigate a deceleration feel generated when the gear position is changed upon the completion of the acceleration and prevent the pitching occurrence.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: March 5, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Koji Kuriyagawa, Hajime Yoshimura
  • Patent number: 8340846
    Abstract: A boat propelling system capable of determining operation accuracy of a transmission mechanism includes an outboard engine main body, a swivel bracket arranged to allow the outboard engine main body to pivot in a right-left direction with respect to a hull, an electric motor provided in the swivel bracket to pivot the outboard engine main body in the right-left direction, a pivot sensor provided in the electric motor to detect a pivot angle of a motor shaft, a transmission mechanism provided in the swivel bracket to transmit a driving force of the electric motor to the outboard engine main body, a pivot sensor arranged to detect an actual pivot angle of the outboard engine main body, and an Electronic Control Unit arranged and programmed to control an operation of the boat propelling system.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: December 25, 2012
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Makoto Mizutani, Ryuta Hayami
  • Patent number: 8317556
    Abstract: A boat propulsion system includes a power source, a propulsion section, a shift position switching mechanism arranged to switch among a first shift position, a second shift position, and a neutral position, a gear ratio switching mechanism, an actuator, and a control section. When switching is to be performed from the neutral position to the first shift position and the high-speed gear ratio, the control section is arranged to cause the actuator to, maintain the low-speed gear ratio, switch to the first shift position, and then establish the high-speed gear ratio when the current gear ratio of the gear ratio switching mechanism is the low-speed gear ratio, and cause the actuator to establish the low-speed gear ratio before switching to the first shift position, switch to the first shift position, and then establish the high-speed gear ratio when the current gear ratio of the gear ratio switching mechanism is the high-speed gear ratio.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: November 27, 2012
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Takayoshi Suzuki, Hideaki Matsushita, Daisuke Nakamura, Tsugunori Konakawa
  • Patent number: 8315750
    Abstract: The invention relates to a method for improving the propulsion efficiency of vessels. The improvement is obtained by utilizing wave induced variations in propeller inflow, i.e. the speed of water flowing towards the propeller. The wave induced water speed variation is used to calculate the propeller speed in a way so that the propeller speed is optimal with respect to the total propulsion efficiency. The optimal propeller speed is determined by solving an optimization problem formulated as the maximization of the ratio of energy delivered by the propeller and the energy delivered to the propeller. The method may be used for vessels with one or more propellers.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: November 20, 2012
    Assignee: Propeller Control ApS
    Inventors: Mogens Blanke, Luca Pivano
  • Publication number: 20120282828
    Abstract: A marine propulsion device includes an engine, a propeller, a drive shaft, an exhaust path, a water intrusion detecting portion and a recording portion. The drive shaft is configured to transmit driving force from the engine to the propeller. The exhaust path allows exhaust air from the engine to pass therethrough. The water intrusion detecting portion is configured to detect a water intrusion potential indicating a possibility of water intrusion into the engine through the exhaust path. The recording portion is configured to record a detection result of the water intrusion detecting portion.
    Type: Application
    Filed: April 4, 2012
    Publication date: November 8, 2012
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventor: Hiroshi INOUE
  • Patent number: 8303360
    Abstract: In an apparatus for controlling operation of an outboard motor mounted on a boat and having a torque converter equipped with a lockup clutch, it is configured to have a clutch controller that controls the lockup clutch to ON when a speed ratio of the torque converter is equal to or greater than a reference value, the clutch controller being configured to determine whether a throttle valve is at about a fully-opened position and to control the lockup clutch to ON when the speed ratio becomes equal to or greater than a predetermined value set smaller than the reference value before the speed ratio reaches the reference value, and the throttle valve is discriminated to be at about the fully-opened position. With this, it becomes possible to reliably make a lockup clutch ON when the acceleration is completed, so that the boat speed can reach the maximum speed.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: November 6, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Koji Kuriyagawa, Hajime Yoshimura
  • Patent number: 8292679
    Abstract: In an apparatus for controlling an outboard motor mounted on a stern of a boat and having an internal combustion engine to power a propeller, a drive shaft that connects the engine and the propeller, a torque converter that is interposed between the engine and the drive shaft and is equipped with a lockup clutch, a water pump connected to the drive shaft to be driven by the drive shaft, and a shift mechanism interposed between the drive shaft and the propeller, comprising a neutral position detector that detects the shift mechanism being set in a neutral position; and a clutch ON unit that makes the lockup clutch ON to increase operation speed of the water pump when it is detected that the shift mechanism is set in the neutral position. With this, it becomes possible to improve cooling performance, thereby preventing a defect such as overheat of the engine.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: October 23, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Koji Kuriyagawa, Hajime Yoshimura, Hikaru Ikeda, Yoshiyuki Matsuda
  • Patent number: 8277270
    Abstract: A boat propulsion unit includes a power source, a propeller, a shift position switching mechanism, a control device, and a retention switch. The propeller is driven by the power source to generate propulsive force. The shift position switching mechanism has an input shaft connected to a side of the power source, an output shaft connected to a side of the propeller, and clutches that change a connection state between the input shaft and the output shaft. A shift position of the shift position switching mechanism is switched among forward, neutral, and reverse by engaging and disengaging the clutches. The control device adjusts an engagement force of the clutches. The retention switch is connected to the control device. When the retention switch is turned on by an operator, the control device controls the engagement force of the clutches to retain a hull in a predefined position. The boat propulsion unit provides a boat propulsion unit that can accurately retain a boat at a fixed point.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: October 2, 2012
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventor: Mitsuhiro Ryuman
  • Publication number: 20120231684
    Abstract: In an apparatus for controlling operation of an outboard motor that has an internal combustion engine equipped with a plurality of cylinders and is configured to switch a shift position between an in-gear position that enables engine's driving force to be transmitted to a propeller and a neutral position that cuts off transmission of the driving force, it is configured such that a neutral operation detector detects a neutral operation in which the shift position is switched from the in-gear position to the neutral position; a driving force controller conducts driving force decreasing control to decrease the driving force when the neutral operation is detected; and a cylinder number changer detects an engine speed variation range during the driving force decreasing control and, of the plurality of the cylinders, determines and changes the number of the cylinders with which the control is to be conducted based on the variation range.
    Type: Application
    Filed: February 22, 2012
    Publication date: September 13, 2012
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Koji KURIYAGAWA, Hiroshi YAMAMOTO
  • Patent number: 8224512
    Abstract: A control system is provided which allows the operator of a marine vessel to select a transmission position (e.g. forward, neutral, or reverse) and an engine speed in the event that a throttle lever malfunctions. By providing messages to the operator on an annunciator and receiving selections from the operator on a plurality of push button switches, a microprocessor selects gear positions and engine operating speed in response to commands received from the operator.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: July 17, 2012
    Assignee: Brunswick Corporation
    Inventors: Michael P. Dengel, Gene A. Smedema
  • Patent number: 8219292
    Abstract: A method is proposed for blocking inadmissible gearshift processes in a transmission with a plurality of shifting devices which, to carry out a shift process, are moved by actuating devices when a shift command is sent by a control unit (TCU) to the relevant actuating device. The actuating devices are connected for data exchange with one another and with the control unit (TCU) in such manner that the actuating device of the shifting device to be shifted is activated provided that clearance has been given by at least one other actuating device.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: July 10, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Andreas Fuessl, Matthias Reisch, Ralf Dreibholz
  • Patent number: 8162708
    Abstract: A marine propulsion system includes an engine, propellers arranged to be rotated by the engine, a transmission mechanism arranged to transmit a driving force of the engine to the propellers with a speed thereof shifted to at least a low speed reduction ratio and a high speed reduction ratio, a GPS sensor arranged to detect a position of a hull propelled by rotation of the propeller, and a control portion and an ECU arranged to control a shift between the speed reduction ratios of the transmission mechanism. The control portion is arranged to calculate a speed of the hull based on positional information of the hull. The control portion and the ECU are arranged to control a shift between the speed reduction ratios of the transmission mechanism based at least on the speed of the hull. This arrangement provides a marine propulsion system in which both acceleration performance and maximum speed can approach specific levels desired by an operator of the boat.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: April 24, 2012
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Takayoshi Suzuki, Daisuke Nakamura
  • Patent number: 8165736
    Abstract: A control device for watercrafts includes a control station having a control lever, a motor, and an actuator coupled to the motor. In one embodiment, the control lever is provided with a sensor for generating a main command signal that corresponds to or is related to a position and/or a displacement of the control lever. The control device further includes control electronics receiving as input at least the main command signal and further having at least a first analog transmission line and a second digital transmission line for transmitting command signals. The control electronics divide the main command signal in two different command signals, a first analog command signal and a second digital command signal, the first analog command signal being sent to the motor through the analog transmission line and/or the second digital command signal being sent to the actuator through the second digital transmission line.
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: April 24, 2012
    Inventors: Giorgio Gai, Giorgio Bosia
  • Patent number: 8157694
    Abstract: In an outboard motor having a power transmission mechanism for transmitting power of an engine to a propeller, the power transmission mechanism has a transmission ratio changing unit having a planetary gear train including a sun gear, planetary gears, and an internal gear. The internal gear is connected to an input side shaft on the engine side. The planetary gears are connected to an output side shaft on the propeller side. The sun gear is connected to a stationary portion via a one-way clutch. The planetary gears and the internal gear and/or the sun gear are connected by an on-off clutch. When the on-off clutch is disengaged, the one-way clutch is engaged and the speed from the input side shaft is outputted from the output side shaft with a reduced speed. When the on-off clutch is engaged, the speed from the input side shaft is outputted from the output side shaft with the same speed.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: April 17, 2012
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Daisuke Nakamura, Yoshihiko Okabe
  • Patent number: 8146723
    Abstract: A hydraulic control apparatus for marine reversing gear assembly for watercraft includes a pressure-reducing valve for adjusting pressure of working oil supplied from a supply pump, and supplying working oil to forward and reverse clutches; a proportional electromagnetic valve for controlling the supply of working oil to a pilot chamber of the pressure reducing valve; and a spring-type switching valve for switching to a circuit for supplying working oil to a control piston chamber for controlling a spring force of the pressure-reducing valve or to a circuit for draining working oil from the chamber; wherein a pressure output from the proportional electromagnetic valve acts upon the switching valve as a pilot pressure; and, when the pilot pressure falls below a predetermined value, the switching valve switches to the circuit for supplying the working oil to the chamber via the spring of the switching valve, fully opening the pressure-reducing valve.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: April 3, 2012
    Assignee: Yanmar Co., Ltd.
    Inventor: Kazuyoshi Harada
  • Patent number: 8128443
    Abstract: A single lever control for combined control of the throttle in a marine engine and of a reversing gear includes a rocking lever mounted onto a supporting arm, which is connected to an actuator causing a reversing gear to transmit engine motion to a shaft driving a propeller or the like either in the same direction of rotation as the drive shaft or opposite thereto. The supporting arm is also dynamically connected to position sensors sensing the angular position of the lever and generating a signal uniquely related thereto. The signal is transmitted to a controller of a motorized actuator of the engine throttle. The angular displacement of the lever is transmitted to a transducer converting rotary motion into an electric signal uniquely related thereto via a gear drive having an input gear controlled by the supporting arm and an output gear connected to a transducer control shaft.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: March 6, 2012
    Assignee: Ultraflex S.p.A.
    Inventors: Giorgio Gai, Marco Campagna
  • Patent number: 8109801
    Abstract: A boat propulsion system that easily and finely adjusts the rotational speed of a propeller includes an outboard motor including a power source, a propeller, a control lever to which an accelerator opening is input, an accelerator opening detection section arranged to output an operating amount of the control lever, a sensitivity switching section, and a control device. A degree of the accelerator opening relative to the operating amount of the control lever is switched by the sensitivity switching section operated by a boat operator. The sensitivity switching section outputs the degree of the accelerator opening relative to the input operating amount of the control lever as a sensitivity switching signal. The control device controls output of the power source based on the operating amount of the control lever and the sensitivity switching signal.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: February 7, 2012
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Takayoshi Suzuki, Daisuke Nakamura
  • Patent number: 8105199
    Abstract: A power transmission mechanism transferring a power output from an engine to a propeller includes a transmission planetary gear train that transforms the output power of the engine before it is transferred to the propeller. The transmission planetary gear train includes a transmission sun gear, a transmission double planetary gear set, and a transmission internal gear, in which the transmission sun gear is connected via the first clutch to the input end shaft extending into the engine, and the transmission sun gear is also connected via the second one-way clutch to the housing. In addition, the transmission double planetary gear set is connected via the second clutch to the input end shaft extending into the engine, and the transmission double planetary gear set is also connected via the first one-way clutch to the housing. Further, the transmission internal gear is connected to the output end shaft extending toward the propeller.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: January 31, 2012
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventor: Yoshihiko Okabe
  • Patent number: 8100732
    Abstract: A boat propulsion unit minimizes a shock upon switching of an engagement state of a clutch mechanism. The boat propulsion unit includes an upper clutch mechanism that is arranged on an axis of a lower drive shaft and that can be switched between an engagement state (first engagement state) in which driving force of an engine is transmitted to a downstream side, and a half clutch state in which the driving force of the engine is reduced and then is transmitted; and an advance-reverse drive that is disposed on an axis of a front propeller drive shaft and a rear propeller drive shaft and that can be switched between a forward travel engagement state and a reverse travel engagement state (second disengagement state) in which the driving force of the engine is transmitted to a front propeller and a rear propeller in order to propel a boat, and a disengagement state (second disengagement state) in which the driving force of the engine is disengaged.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: January 24, 2012
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Daisuke Nakamura, Yoshihiko Okabe, Yoshihito Fukuoka, Masami Suzuki
  • Patent number: 8078347
    Abstract: A control device for a watercraft propulsion system can reduce wear of a shift mechanism, can achieve an automated extremely slow speed navigation and easy watercraft navigation, and can negate differences between watercraft navigation skills of watercraft operators. A remote control operation section includes a remote controller shift lever. A watercraft propulsion section includes a shift change unit and a shift actuator arranged to drive the shift change unit, a main control section arranged to control an operation of the shift actuator based upon an operational amount of the remote controller shift lever, an auxiliary control section arranged to control a watercraft to move at an extremely slow speed, and a changeover section arranged to select one of the main control section and an auxiliary control section.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: December 13, 2011
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventor: Minoru Minoura
  • Patent number: 8075356
    Abstract: A marine vessel propulsion device includes an engine arranged to generate a driving force by combustion of a fuel by an ignition unit, a thrust generating unit arranged to be driven by the driving force of the engine to generate thrust underwater, a shift mechanism unit arranged to switch between a transmitting state of transmitting the driving force of the engine to the thrust generating unit and a cut-off state of cutting off the driving force of the engine from the thrust generating unit, a shift drive unit arranged to drive the shift mechanism unit, and a control unit arranged to electrically control the shift drive unit based on a position of a shift operational unit that is arranged to be operated by a user to perform a shifting operation to a first shift position corresponding to the transmitting state, and a second shift position corresponding to the cut-off state.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: December 13, 2011
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventor: Makoto Ito
  • Publication number: 20110294374
    Abstract: In an apparatus for controlling operation of an outboard motor having an internal combustion engine and transmission, it is configured to control operation of the transmission to change the gear position to the first or second speed in response to a speed change command outputted upon an operator's manipulation, determine whether a throttle valve of the engine is at a fully-opened position or thereabout when the speed change command to the first speed is outputted, and determine whether the engine is under a predetermined operating condition when the throttle valve is determined to be at the fully-opened position or thereabout, wherein the transmission controller changes the gear position from the first speed to the second speed when the engine is determined to be under the predetermined operating condition. With this, it becomes possible to mitigate load on a transmission gear to improve durability of the transmission.
    Type: Application
    Filed: May 25, 2011
    Publication date: December 1, 2011
    Applicant: HONDA MOTOR CO., LTD.
    Inventor: Koji KURIYAGAWA
  • Publication number: 20110294377
    Abstract: A control device, in particular for a boat drive, which comprises a control drive, a reduction gear system (8, 11, 15/17) and a control element (2) that can be pivoted through a steering angle. The reduction gear system comprises a multi-stage toothed gear transmission (8, 11, 15/17) with a toothed wheel (10) on the drive input side, and the control drive comprises two servomotors (6) which drive the toothed wheel (10) simultaneously but whose driving action are slightly opposed to one another.
    Type: Application
    Filed: February 11, 2010
    Publication date: December 1, 2011
    Applicant: ZF FRIEDRICHSHAFEN AG
    Inventors: Fernando Gallato, Adone Bertolo, Daniele Sacchi
  • Publication number: 20110294376
    Abstract: In an apparatus for controlling operation of an outboard motor having an internal combustion engine, a transmission and a low-speed cruise controller controlling a rotational speed of the propeller to make the boat cruise at low speed, the low-speed cruise controller outputs an increase/decrease command of the propeller rotational speed in response to an operator's manipulation, and change the gear position from the second speed to the first speed when the decrease command is outputted under a condition where the gear position is in the second speed and an engine speed is equal to or greater than a predetermined speed. With this, it becomes possible to decrease the propeller rotational speed to the maximum extent, thereby making a boat cruise at very low speed.
    Type: Application
    Filed: May 25, 2011
    Publication date: December 1, 2011
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Koji KURIYAGAWA, Hajime YOSHIMURA
  • Patent number: 8066539
    Abstract: A marine propulsion system includes a transmission mechanism arranged to transmit a driving force generated by an engine to propellers with a speed thereof changed to a low speed reduction ratio and a high speed reduction ratio; a control lever section operated by a user in controlling drive of the engine; and a control portion and an ECU controlling a shift between reduction ratios of the transmission mechanism based on operation of the control lever section by the user. The control portion and the ECU control a shift between reduction ratios of the transmission mechanism based on a transmission control map providing a reference for a shift between reduction ratios of the transmission mechanism taking into consideration an engine speed of the engine and a lever opening of the control lever section. This arrangement provides a marine propulsion system in which both acceleration performance and maximum speed can approach levels that a user desires.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: November 29, 2011
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Takayoshi Suzuki, Daisuke Nakamura
  • Patent number: 8050849
    Abstract: A mixed-mode method for operating a vehicle's propulsion plant to travel at a selected average speed using the minimum amount of fuel. The method involves travelling in one mode at high speed part of the time, and in a different mode at low speed part of the time, in such a way that the average speed is the selected value.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: November 1, 2011
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Gerald Gerard Brown, Jeffrey Eugene Kline, Richard Edwin Rosenthal, Pascale Menconi, legal representative, Alan R. Washburn