Abstract: A urethane resin composition obtained by a method comprising the steps of: melt mixing an isocyanate (B), an antioxidant (C), a release agent (D) and a dispersing agent (E) to obtain a molten mixture, and mixing the molten mixture and a polyol (A): wherein the release agent (D) is a compound represented by the following formula (1): [Chemical Formula 1] R1—COOH??(1) the dispersing agent (E) is a compound represented by the following formula (2) having a weight-average molecular weight Mw of no greater than 16000: and the content of the dispersing agent (E) in the urethane resin composition is 0.1 to 5.0 wt %.

Abstract: A marine vessel propulsion system includes first and second propulsion devices arranged to be mounted on a hull, a first operation lever arranged to be operated by a marine vessel maneuvering operator to control the first propulsion device to have a shift state selected from among a forward drive state, a neutral state, and a reverse drive state and to control a power output of the first propulsion device, a second operation lever arranged to be operated by the marine vessel maneuvering operator to control the second propulsion device to have a shift state selected from among a forward drive state, a neutral state, and a reverse drive state and to control a power output of the second propulsion device. A control unit is programmed to set a target pivoting speed according to the positions of the first and second operation levers.

Abstract: A substrate for mounting optical semiconductor elements is provided, including a base substrate having an insulating layer and a plurality of wiring circuits formed on the upper face of the insulating layer, and having at least one external connection terminal formation opening portion which penetrates the insulating layer and reaches the wiring circuits; and an optical reflection member, which is provided on the upper face of the base substrate, and which forms at least one depressed portion serving as an area for mounting an optical semiconductor element.

Abstract: A watercraft can have an electric motor mounted on a screw bar extending in a right/left direction. The electric motor can move along the screw bar in the right/left direction to steer an outboard motor, or another part of a different marine propulsion system. One or more springs can be provided at the ends of the screw bar. When the outboard motor whose steered angle exists in a predetermined angle range including the maximum steered angle is steered back to a neutral position, either one of the springs presses the electric motor toward the center of the screw bar to assist the steering torque of the electric motor.

Abstract: A propulsion device includes a propulsion device main body, an attachment mechanism, and a steering mechanism. The attachment mechanism is arranged to attach the propulsion device main body to a hull such that the propulsion device main body turns right and left with respect to the hull about a swivel shaft. Further, the attachment mechanism is arranged to attach the propulsion device main body to the hull such that the propulsion device main body turns up and down with respect to the hull about a tilt shaft. The steering mechanism includes a motor and a transmitting mechanism. The transmitting mechanism is arranged to transmit a driving force of the motor to the propulsion device main body to turn the propulsion device main body to the right or the left. The attachment mechanism includes a housing space in which the motor and the transmitting mechanism are housed.

Abstract: A watercraft steering device can include at least one of steerage status detection device configured to detect a steerage status following an operation of the steering wheel, running status detecting device configured to detect a running status of the watercraft, watercraft propulsion unit status recognition device configured to recognize a status of an outboard motor such as an installation number thereof, and electric motor status detection device configured to detect a status of an electric motor, and can further include a lower unit turning force characteristic computation device configured to compute a lower unit turning force characteristic based on a detection value from at least one of the device, and an ECU configured to control at least one of a reaction force to the steering wheel, a limit lower unit turning angle, and a propulsive force based on a computed lower unit turning force characteristic and/or selecting the electric actuator to operate.

Abstract: A boat includes a steering load detector arranged to calculate an output value of a steering motor necessary for steering an outboard motor in a traveling state, a motor output detector arranged to detect a possible output value that can be output by the steering motor, a prediction determination unit arranged to compare the necessary output value from the steering load detector with the possible output value from the motor output detector, and an electric power load control unit arranged to perform a control operation so as to increase a battery charge amount and/or to reduce the electric power load when the necessary output value is determined to be larger than the possible output value. As a result, the boat that can effectively perform steering when a motor output becomes small as a result of a reduced battery charge amount.

Abstract: An electric steering device includes a steering retaining device arranged to retain a steering angle against an external steering force applied from outside of a watercraft to an outboard motor main body. A reverse input shutoff clutch, for example, is preferably used as the steering retaining device. A steering retaining state in which a steering angle of the outboard motor main body is retained can be detected from a steering condition of the outboard motor main body, and a control is made to stop electric power from being supplied to an electric motor steering the outboard motor main body. Accordingly, the steering retaining device retains a steering angle while steering is retained, and thus the electric power supply to the electric motor can be stopped, which allows electric power to be saved. The steering retaining device provides an electric steering device for a watercraft in which no electric power is required when applying a steering retaining force for retaining a counter-steering state.

Abstract: A steering wheel, operable by an operator, can be electrically connected to an electric motor to provide an actuation signal corresponding to the amount of a steering wheel operation to the electric motor, a reaction motor for applying a reaction to the steering wheel, and an ECU for controlling the electric motor are provided. The ECU can include at least one of an operation status detection device for detecting an operation status corresponding to the steering wheel operation, a running status detection device for detecting a running status of the watercraft, an outboard motor status recognition device for recognizing a status of the outboard motor, such as the installation number thereof, and an electric motor status detection device for detecting a status of the electric motor.

Abstract: The epoxy resin molding material of the invention comprises (A) an epoxy resin and (B) a curing agent, wherein the (B) curing agent contains a polyvalent carboxylic acid condensate. The thermosetting resin composition of the invention comprises (A) an epoxy resin and (B) a curing agent, wherein the viscosity of the (B) curing agent is 1.0-1000 mPa·s at 150° C., as measured with an ICI cone-plate Brookfield viscometer.

Abstract: A watercraft includes a plurality of outboard motors. Each of the outboard motors has a generator and a rudder deflecting system driven by an electric motor. The outboard motors are turned by the rudder deflecting systems thereby steering the watercraft. Electric power can be supplied from the generators of others of the plurality of outboard motors to the rudder deflecting system of an arbitrary outboard motor among the plurality of the outboard motors. Using this arrangement it is possible to provide a watercraft in which electric power for operation is stably supplied to the rudder deflecting system without increasing the size of the generators.

Abstract: The epoxy resin molding material of the invention comprises (A) an epoxy resin and (B) a curing agent, wherein the (B) curing agent contains a polyvalent carboxylic acid condensate. The thermosetting resin composition of the invention comprises (A) an epoxy resin and (B) a curing agent, wherein the viscosity of the (B) curing agent is 1.0-1000 mPa·s at 150° C., as measured with an ICI cone-plate Brookfield viscometer.

Abstract: A boat propelling system capable of determining an abnormality regarding steering of a propelling system main body includes an 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. The ECU calculates a target pivot angle change amount based on a target pivot angle derived from the steering angle and a baseline target pivot angle, calculates an actual pivot angle change amount based on the actual pivot angle and a baseline actual pivot angle, and obtains a gap amount between the target pivot angle change amount and the actual pivot angle change amount. Then, the ECU determines an abnormality regarding steering of the outboard engine main body based on a result of comparison between the gap amount and the first threshold value.

Abstract: A boat has a propulsion unit and a steering system. The steering system includes a steering device actuated by an electric actuator. A steering wheel operated by an operator is electrically connected to the actuator. Detectors collect data regarding one or more of operation status of the steering wheel, running status of the boat, status of the propulsion unit, status of the electric actuator, and the like. In certain situations, the electric actuator may not be capable of providing a quick steering response. A controller weighs detected data to identify such situations and controls a propulsive force of the propulsion unit so as to restrain the propulsive force if necessary to maintain good steering response.

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 ECU arranged and programmed to control an operation of the boat propelling system.

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

Abstract: A marine vessel steering apparatus includes a steering mechanism arranged to be operable by an operator, a steering unit arranged to turn a pivoting unit mounted pivotally on a marine vessel, a detecting unit arranged to detect if an actual pivoting angle, the turning angle of the pivoting unit, becomes equal to or greater than a predetermined angle, a locking unit arranged to lock the turning of the steering mechanism, and a control unit. The control unit is programmed to set a target pivoting angle based on the turning state of the steering mechanism and to drive the steering unit to make the actual pivoting angle equal to the target pivoting angle. The control unit is also programmed, when the detecting unit detects that the actual pivoting angle becomes equal to or greater than the predetermined angle, to drive the locking unit to lock the turning of the steering mechanism.

Abstract: There is provided a thermosetting light-reflecting resin composition that has a high level of various characteristics required of optical semiconductor element mounting boards, such as optical properties and thermal discoloration resistance, provides high releasability during molding such as transfer molding, and allows molding processes to be performed continuously. There are also provided a highly-reliable optical semiconductor element mounting board and an optical semiconductor device each produced with the resin composition, and methods for efficient production thereof.

Abstract: A marine vessel propulsion system includes multiple propulsion devices, multiple operation levers, and multiple lever position sensors arranged to detect the positions of the multiple operation levers, and a control unit. The control unit is programmed to control, based on detection results from the multiple lever position sensors, the shift states of the respective propulsion devices and to change the steering angle of at least one of the propulsion devices. The control unit may be arranged to change the steering angles of the propulsion devices to facilitate the behavior of the hull corresponding to the shift states of the respective propulsion devices.

Abstract: A marine vessel propulsion system includes first and second propulsion devices arranged to be mounted on a hull so as to enable a steering angle to change, a first operation lever arranged to be operated by a marine vessel maneuvering operator to control the first propulsion device to have a shift state selected from among a forward drive state, a neutral state, and a reverse drive state and to control a power output of the first propulsion device, a second operation lever arranged to be operated by the marine vessel maneuvering operator to control the second propulsion device to have a shift state selected from among a forward drive state, a neutral state, and a reverse drive state and to control a power output of the second propulsion device, a first lever position sensor arranged to detect a position of the first operation lever, a second lever position sensor arranged to detect a position of the second operation lever, and a control unit.