Patents by Inventor Kazumi Miyashita
Kazumi Miyashita has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230030345Abstract: Constant-speed-travel-apparatus controlling prime-mover so that mobile-body mounted with the prime-mover travels at constant-speed, includes: function-operation-member being instructed activation of speed-maintaining-function of the mobile-body in response to operation by operator; first-speed-operation-member being instructed the travel-speed of the mobile-body in accordance with operation-amount by the operator; second-speed-operation-member being instructed change of the travel-speed by predetermined amount in response to operation by the operator in state where activation of the speed-maintaining-function has been instructed through the function-operation-member; and electronic-control-unit controlling output of the prime-mover based on the operation-amount of the first-speed-operation-member and number of times of operation of the second-speed-operation-member so that the mobile-body travels at constant-speed in the state.Type: ApplicationFiled: July 26, 2022Publication date: February 2, 2023Inventors: Akira Kato, Hiroshi Yamamoto, Kazumi Miyashita, Yoshiyuki Misumi
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Patent number: 11512676Abstract: A detection apparatus for detecting a cam angle of a 4-stroke multi-cylinder engine in which explosion intervals are unequal intervals, includes a detection target member configured to rotate in synchronism with a camshaft, and first and second cam angle sensors configured to detect rotation of the detection target member. The detection target member includes a plurality of first detection target portions arranged, at equal pitches, as many as the number of cylinders of the multi-cylinder engine. The second cam angle sensor is arranged while being shifted in the rotation direction with respect to the first cam angle sensor such that any one of detection signals of the plurality of first detection target portions by the first cam angle sensor and the second cam angle sensor is output at a timing corresponding to each explosion interval.Type: GrantFiled: March 23, 2021Date of Patent: November 29, 2022Assignee: HONDA MOTOR CO., LTD.Inventors: Akifumi Fujima, Kazumi Miyashita
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Publication number: 20210301776Abstract: A detection apparatus for detecting a cam angle of a 4-stroke multi-cylinder engine in which explosion intervals are unequal intervals, includes a detection target member configured to rotate in synchronism with a camshaft, and first and second cam angle sensors configured to detect rotation of the detection target member. The detection target member includes a plurality of first detection target portions arranged, at equal pitches, as many as the number of cylinders of the multi-cylinder engine. The second cam angle sensor is arranged while being shifted in the rotation direction with respect to the first cam angle sensor such that any one of detection signals of the plurality of first detection target portions by the first cam angle sensor and the second cam angle sensor is output at a timing corresponding to each explosion interval.Type: ApplicationFiled: March 23, 2021Publication date: September 30, 2021Applicant: HONDA MOTOR CO., LTD.Inventors: Akifumi Fujima, Kazumi Miyashita
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Patent number: 8808040Abstract: In an apparatus for controlling operation of an outboard motor having a shift lever used to change a shift position between an in-gear position that enables driving force of an internal combustion engine to be transmitted to a propeller by engaging a clutch with one of a forward gear and a reverse gear and a neutral position that cuts off transmission of the driving force by disengaging the clutch from the forward or reverse gear, it is configured to detect a throttle opening of the engine; detect a speed of the engine; calculate a change amount of the detected engine speed; and conduct driving force decreasing control to decrease the driving force of the engine based on the detected throttle opening, the detected engine speed and the calculated engine speed change amount.Type: GrantFiled: May 16, 2012Date of Patent: August 19, 2014Assignee: Honda Motor Co., Ltd.Inventors: Koji Kuriyagawa, Hiroshi Yamamoto, Tomohiro Miyauchi, Kazumi Miyashita
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Publication number: 20120295498Abstract: In an apparatus for controlling operation of an outboard motor having a shift lever used to change a shift position between an in-gear position that enables driving force of an internal combustion engine to be transmitted to a propeller by engaging a clutch with one of a forward gear and a reverse gear and a neutral position that cuts off transmission of the driving force by disengaging the clutch from the forward or reverse gear, it is configured to detect a throttle opening of the engine; detect a speed of the engine; calculate a change amount of the detected engine speed; and conduct driving force decreasing control to decrease the driving force of the engine based on the detected throttle opening, the detected engine speed and the calculated engine speed change amount.Type: ApplicationFiled: May 16, 2012Publication date: November 22, 2012Applicant: HONDA MOTOR CO., LTD.Inventors: Koji KURIYAGAWA, Hiroshi YAMAMOTO, Tomohiro MIYAUCHI, Kazumi MIYASHITA
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Patent number: 8134265Abstract: A magnetic generator, or a so-called inner-rotor generator, provided with a rotor on the inside of a stator. The rotor has a ring-shaped yoke and a magnet integrally mounted in advance to the outer circumferential surface of the yoke. The rotor is mounted to a hub spindle of a rotating body.Type: GrantFiled: June 5, 2009Date of Patent: March 13, 2012Assignee: Honda Motor Co., Ltd.Inventors: Yoshinori Maekawa, Kazutomo Nishida, Kazumi Miyashita
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Patent number: 7688193Abstract: An oil level detection device for an internal combustion engine, which comprises: a housing permitting entry therein of oil; a float provided within the housing and vertically movable with the oil entered in the housing; a switch for performing switching operation in response to the vertical movement of the float within the housing; protrusions provided, on the upper surface of the float, for preventing the float from sticking to the ceiling of the housing due to viscosity of the oil; and protrusions provided, on the bottom of the housing, for preventing the float from sticking to the bottom of the housing due to viscosity of the oil.Type: GrantFiled: January 26, 2007Date of Patent: March 30, 2010Assignee: Honda Motor Co., Ltd.Inventors: Kazutomo Nishida, Kazumi Miyashita, Toshikazu Nakamura, Toru Taniguchi
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Patent number: 7649446Abstract: A multipurpose engine controller comprises a control unit for switching between supplying and stopping power supplied from an ignition circuit to a spark plug on the basis of two states, i.e., the operating state of the multipurpose engine determined based on a detection signal from the engine speed sensor, and the state of the level of the oil inside the crankcase determined based on a detection signal from the float-type oil level sensor.Type: GrantFiled: January 26, 2007Date of Patent: January 19, 2010Assignee: Honda Motor Co., Ltd.Inventors: Kazumi Miyashita, Kazutomo Nishida, Toshikazu Nakamura, Toru Taniguchi
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Publication number: 20090309462Abstract: A magnetic generator, or a so-called inner-rotor generator, provided with a rotor on the inside of a stator. The rotor has a ring-shaped yoke and a magnet integrally mounted in advance to the outer circumferential surface of the yoke. The rotor is mounted to a hub spindle of a rotating body.Type: ApplicationFiled: June 5, 2009Publication date: December 17, 2009Applicant: Honda Motor Co., Ltd.Inventors: Yoshinori MAEKAWA, Kazutomo Nishida, Kazumi Miyashita
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Patent number: 7395810Abstract: Oil level detection sensor detects an oil level in a crankcase. First charging circuit includes a serial connection of a first charging capacitor for charging a reverse voltage produced in a primary coil, the detection sensor, and a first diode. Thyristor is turned on, in response to voltage-charging of the first charging capacitor, to disable an ignition operation of an ignition circuit. Second charging circuit includes a serial connection of a second charging capacitor for charging a forward voltage, produced in the primary coil, and a second diode. Transistor is turned on, in response to voltage-charging of the second charging capacitor, to disable a turning-on operation of the thyristor.Type: GrantFiled: February 26, 2007Date of Patent: July 8, 2008Assignees: Honda Motor Co., Ltd., Iida Denki Kogyo Co., Ltd.Inventors: Kazumi Miyashita, Kazutomo Nishida, Toshikazu Nakamura, Toru Taniguchi, Hiroshi Mochizuki
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Patent number: 7300322Abstract: An outboard motor is equipped with a centrifugal clutch located between the crankshaft of an engine and a rotor of an electric motor for, when the engine operates, transmitting its output to through the rotor to a propeller, and with a motor output transmission mechanism for, when the engine does not operate, transmitting the output of the motor to the crankshaft. The engine can therefore be started by the motor used to drive the propeller. As a result, there is no need to install a separate electric motor for engine starting, so that starting of the engine by electric power can be made possible with minimum increase in the size and cost of the outboard motor.Type: GrantFiled: July 22, 2005Date of Patent: November 27, 2007Assignee: Honda Motor Co., Ltd.Inventors: Hiroyuki Kitani, Kazumi Miyashita, Shigeo Terada, Tadafumi Hirose
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Publication number: 20070204833Abstract: Oil level detection sensor detects an oil level in a crankcase. First charging circuit includes a serial connection of a first charging capacitor for charging a reverse voltage produced in a primary coil, the detection sensor, and a first diode. Thyristor is turned on, in response to voltage-charging of the first charging capacitor, to disable an ignition operation of an ignition circuit. Second charging circuit includes a serial connection of a second charging capacitor for charging a forward voltage, produced in the primary coil, and a second diode. Transistor is turned on, in response to voltage-charging of the second charging capacitor, to disable a turning-on operation of the thyristor.Type: ApplicationFiled: February 26, 2007Publication date: September 6, 2007Applicants: HONDA MOTOR CO., LTD., IIDA DENKI KOGYO CO., LTD.Inventors: Kazumi Miyashita, Kazutomo Nishida, Toshikazu Nakamura, Toru Taniguchi, Hiroshi Mochizuki
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Publication number: 20070194941Abstract: An oil level detection device for an internal combustion engine, which comprises: a housing permitting entry therein of oil; a float provided within the housing and vertically movable with the oil entered in the housing; a switch for performing switching operation in response to the vertical movement of the float within the housing; protrusions provided, on the upper surface of the float, for preventing the float from sticking to the ceiling of the housing due to viscosity of the oil; and protrusions provided, on the bottom of the housing, for preventing the float from sticking to the bottom of the housing due to viscosity of the oil.Type: ApplicationFiled: January 26, 2007Publication date: August 23, 2007Applicant: HONDA MOTOR CO., LTD.Inventors: Kazutomo Nishida, Kazumi Miyashita, Toshikazu Nakamura, Toru Taniguchi
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Publication number: 20070182251Abstract: A multipurpose engine controller comprises a control unit for switching between supplying and stopping power supplied from an ignition circuit to a spark plug on the basis of two states, i.e., the operating state of the multipurpose engine determined based on a detection signal from the engine speed sensor, and the state of the level of the oil inside the crankcase determined based on a detection signal from the float-type oil level sensor.Type: ApplicationFiled: January 26, 2007Publication date: August 9, 2007Applicant: HONDA MOTOR CO., LTD.Inventors: Kazumi Miyashita, Kazutomo Nishida, Toshikazu Nakamura, Toru Taniguchi
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Publication number: 20060025025Abstract: An outboard motor is equipped with a centrifugal clutch located between the crankshaft of an engine and a rotor of an electric motor for, when the engine operates, transmitting its output to through the rotor to a propeller, and with a motor output transmission mechanism for, when the engine does not operate, transmitting the output of the motor to the crankshaft. The engine can therefore be started by the motor used to drive the propeller. As a result, there is no need to install a separate electric motor for engine starting, so that starting of the engine by electric power can be made possible with minimum increase in the size and cost of the outboard motor.Type: ApplicationFiled: July 22, 2005Publication date: February 2, 2006Applicant: Honda Motor Co., Ltd.Inventors: Hiroyuki Kitani, Kazumi Miyashita, Shigeo Terada, Tadafumi Hirose
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Patent number: 6868832Abstract: The invention intends to downsize a general-purpose engine generator and make operability thereof easy. A backup battery (233) is provided for the generator (22). The battery supplies electricity to an electronic controlled device such as a fuel pump for starting the engine. When the engine (1) carries out a rating operation, electricity is supplied from the generator (22). When the engine speed in a low speed range, only a pump (15) is driven. When the engine speed is exceeds the low speed range, the pump (15) is stopped, and an injectors, (10) and (27) are driven to be prevented from lapping over each other. When the engine speed reaches a high-speed range, the pump (15) is again driven. Electricity consumption at a time of starting is restricted by driving the electronic controlled devices at different timings until the engine (1) operation becomes self-sustaining.Type: GrantFiled: June 28, 2004Date of Patent: March 22, 2005Assignee: Honda Motor Co., Ltd.Inventors: Takao Tamechika, Naoya Toida, Yoshihisa Shinogi, Kazutomo Nishida, Kazumi Miyashita
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Publication number: 20050005914Abstract: The invention intends to downsize a general-purpose engine generator and make operability thereof easy. A backup battery (233) is provided for the generator (22). The battery supplies electricity to an electronic controlled device such as a fuel pump for starting the engine. When the engine (1) carries out a rating operation, electricity is supplied from the generator (22). When the engine speed is in a low speed range, only a pump (15) is driven. When the engine speed is exceeds the low speed range, the pump (15) is stopped, and an injectors (10) and (27) are driven to be prevented from lapping over each other. When the engine speed reaches a high-speed range, the pump (15) is again driven. Electricity consumption at a time of starting is restricted by driving the electronic controlled devices at different timings until the engine (1) executes a self-sustaining.Type: ApplicationFiled: June 28, 2004Publication date: January 13, 2005Applicant: HONDA MOTOR CO., LTD.Inventors: Takao Tamechika, Naoya Toida, Yoshihisa Shinogi, Kazutomo Nishida, Kazumi Miyashita
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Patent number: 6550462Abstract: In an engine ignition system that includes a rotor that rotates in synchronism with rotation of an engine, an iron core fixedly disposed opposite the outer periphery of the rotor, and a primary coil and a secondary coil that are wound concentrically around the iron core, to reduce the weight of the rotor while allowing the rotational balance of the rotor to be easily adjusted, simplify the arrangement of the rotor itself, and secure an effectively usable space in the region on the inside of the rotor in the radial direction. Permanent magnets are fitted to the iron core having a plurality of legs opposite the outer periphery of the rotor at positions that are spaced in the peripheral direction of the rotor, and an inductor is fixed to the outer periphery of the rotor. The inductor forms a magnetic path for the magnetic flux that is formed by the permanent magnets between pairs of legs.Type: GrantFiled: December 4, 2001Date of Patent: April 22, 2003Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Mitsuru Nakamura, Kazumi Miyashita
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Publication number: 20020066429Abstract: In an engine ignition system that includes a rotor that rotates in synchronism with rotation of an engine, an iron core fixedly disposed opposite the outer periphery of the rotor, and a primary coil and a secondary coil that are wound concentrically around the iron core, to reduce the weight of the rotor while allowing the rotational balance of the rotor to be easily adjusted, simplify the arrangement of the rotor itself, and secure an effectively usable space in the region on the inside of the rotor in the radial direction. Permanent magnets are fitted to the iron core having a plurality of legs opposite the outer periphery of the rotor at positions that are spaced in the peripheral direction of the rotor, and an inductor is fixed to the outer periphery of the rotor. The inductor forms a magnetic path for the magnetic flux that is formed by the permanent magnets between pairs of legs.Type: ApplicationFiled: December 4, 2001Publication date: June 6, 2002Inventors: Mitsuru Nakamura, Kazumi Miyashita
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Patent number: 6374791Abstract: An engine starting device includes a self-starting motor drivable to rotate the crankshaft of an engines, and a one-way clutch operable to permit transmission of rotary motion of the self-starting motor in one direction only to the crankshaft. The one-way clutch includes an inner race operatively connected to an output shaft of the self-starting motor, an outer race operatively connected to the crankshaft, a plurality of ratchet pawls pivotally connected to the inner race and urged by springs against the inner race. The one-way clutch is designed such that, when the speed of rotation of the inner race while being rotated by the self-starting motor goes up to a predetermined value, the ratchet pawls are caused to swing in a radial outward direction under the action of centrifugal force against the bias of the springs and become engaged by the outer race to thereby engage the one-way clutch.Type: GrantFiled: August 7, 2000Date of Patent: April 23, 2002Assignees: Honda Giken Kogyo Kabushiki Kaisha, Starting Industrial Co., Ltd.Inventors: Shigeaki Kuwabara, Kazumi Miyashita, Keizo Shimizu, Taro Kihara