Abstract: An electronic control apparatus for driving a boat capable of safely and positively steering the boat to move forward and backward, including: a steering mechanism; a shift actuator for switching neutral, forward, backward; a throttle actuator for driving a throttle valve; and an electronic control unit connected to the steering mechanism, the shift actuator and the throttle actuator, for calculating a movement command value and an output command value for controlling the shift actuator and the throttle actuator, respectively, based on a steering position signal from the steering mechanism, and for controlling the shift actuator and the throttle actuator according to the movement command value, the output command value, feedback signals indicating control states, the electronic control section restrains the output command value until a shift operation of the shift actuator is completed, when the movement command value has been generated for shifting the shift actuator to forward or backward.

Abstract: Provided is an rpm control device for a general-purpose engine, which is capable of realizing droop control in a spark-ignition engine only by the adaptation of isochronous control. When the droop control is selected, a rotation decrease rate (K) (value equal to or smaller than 1) is obtained from an engine rpm and a load. The result of multiplication of a basic target rpm (Nb) requested by a driver by the rotation decrease rate (K) is obtained as a target rpm (No). By setting the rotation decrease rate to a smaller value as the load becomes higher, the target rpm (No) is set smaller than the basic target rpm (Nb). The isochronous control is performed by using an electronic throttle so as to achieve the obtained target rpm (No) to realize the droop control in a pseudo-manner.

Abstract: A rotation-position detection system according to the present invention is configured with a resolver mounted in a brushless motor and a motor controller. The motor controller outputs an excitation signal to the resolver and an A/D converter thereof alternately applies analogue/digital conversion to a sine wave signal and a cosine wave signal outputted from the resolver so that a rotation position of the motor is calculated.

Abstract: A general purpose engine control apparatus can detect misfire occurrence with high accuracy, while reducing adaptation man hours of misfire determination. The apparatus includes a first air/fuel ratio determiner to make a rich/lean determination, an injection amount corrector to calculate a corrected injection amount corresponding to a stoichiometric air/fuel ratio, an injection controller to supply fuel to the engine so as to match the corrected injection amount, a second air/fuel ratio determiner to make a rich/lean determination based on a comparison of the O2 sensor output with a rich and a lean determination voltage, a rich/lean period calculator to calculate a rich/lean period according to the determination of the second air/fuel ratio determiner, and a misfire determiner to determine the presence or absence of a misfire based on the rich/lean period. The injection controller stops fuel injection to the engine in the presence of a misfire.

Abstract: A steering system includes: a steering wheel; a steering wheel sensor configured to detect an operation angle of the steering wheel; an actuator configured to turn an outboard engine; a plurality of turn angle sensors including a first turn angle sensor configured to detect a turn angle; and a control unit configured to calculate a controlling turn angle, and to drive the actuator to turn the outboard engine in accordance with a difference between the controlling turn angle and the turn angle. If an anomaly of the first turn angle sensor is detected, the control unit continues to drive the actuator based on information from a second turn angle sensor in a normal state, and drives the actuator so as to limit the turn angle of the outboard engine as compared with a case in which the first turn angle sensor is in a normal state.

Abstract: A thermally conductive silicone rubber composition comprises: (A) an organopolysiloxane that contains at least two silicon-bonded alkenyl groups in each molecule, that does not contain silicon-bonded hydroxyl and alkoxy groups, and that has a content of cyclic siloxanes having from 4 to 20 siloxane units of not more than 1,000 ppm in mass units; (B) an organopolysiloxane that contains at least two silicon-bonded hydrogen atoms in each molecule and that does not contain silicon-bonded alkenyl, hydroxyl group, and alkoxy groups; (C) an adhesion promoter; (D) a thermally conductive filler; and (E) a hydrosilylation reaction catalyst; wherein the total quantity of components (B) and (C) is from 0.5 to 10 mass % of the total quantity of components (A), (B), and (C). The composition is characterized by reduced oil fraction that bleeds out during the course of curing, and by reduced low-boiling fraction that volatilizes during the course of curing.

Abstract: A rotation-position detection system according to the present invention is configured with a resolver mounted in a brushless motor and a motor controller. The motor controller outputs an excitation signal to the resolver and an A/D converter thereof alternately applies analogue/digital conversion to a sine wave signal and a cosine wave signal outputted from the resolver so that a rotation position of the motor is calculated.

Abstract: In an electronic device, a silicone adhesive bonding first and second members is made from a composition comprising: (A) 100 parts by mass of an organopolysiloxane containing in one molecule at least two alkenyl groups and being free of silicon-bonded hydroxyl and alkoxy groups wherein the content of cyclic siloxanes having 4 to 20 siloxane units is at most 0.1 mass %; (B) an organopolysiloxane containing in one molecule at least two silicon-bonded hydrogen atoms and being free of an alkenyl group, and silicon-bonded hydroxyl and alkoxy groups; (C) at least 0.05 parts by mass of an adhesion promoter; (D) 100 to 2000 parts by mass of a thermally conductive filler; and (E) a hydrosilylation-reaction catalyst. (B) is contained such that the silicon-bonded hydrogen atoms is in the range of 0.5 to 10 mol per 1 mol of the alkenyl groups of (A), and the sum of (B) and (C) is 0.5 to 10 mass % of the sum of (A), (B) and (C).

Abstract: A steering system includes: a steering wheel; a steering wheel sensor configured to detect an operation angle of the steering wheel; an actuator configured to turn an outboard engine; a plurality of turn angle sensors including a first turn angle sensor configured to detect a turn angle; and a control unit configured to calculate a controlling turn angle, and to drive the actuator to turn the outboard engine in accordance with a difference between the controlling turn angle and the turn angle. If an anomaly of the first turn angle sensor is detected, the control unit continues to drive the actuator based on information from a second turn angle sensor in a normal state, and drives the actuator so as to limit the turn angle of the outboard engine as compared with a case in which the first turn angle sensor is in a normal state.

Abstract: An electronic control apparatus for driving a boat capable of safely and positively steering the boat to move forward and backward, including: a steering mechanism; a shift actuator for switching neutral, forward, backward; a throttle actuator for driving a throttle valve; and an electronic control unit connected to the steering mechanism, the shift actuator and the throttle actuator, for calculating a movement command value and an output command value for controlling the shift actuator and the throttle actuator, respectively, based on a steering position signal from the steering mechanism, and for controlling the shift actuator and the throttle actuator according to the movement command value, the output command value, feedback signals indicating control states, the electronic control section restrains the output command value until a shift operation of the shift actuator is completed, when the movement command value has been generated for shifting the shift actuator to forward or backward.

Abstract: A scroll chuck device comprising an annular body, a ring plate which is rotatably fitted in the annular body and which has scroll grooves, jaw holders on the ring plate which have clamping jaws and which are engaged in the corresponding scroll grooves so that the relative rotational movement between the ring plate and the jaw holders causes the latter to radially move, and clutch means between the annular body and the ring plate.

Abstract: A die-head of a cutting machine having a pair of relatively rotatable annular plates which retractably hold therebetween cutting tools extending in radial directions, one of the plates being provided with a tool retracting lever which is pivotably mounted thereto and which is directly engaged by a projection provided on the other plate, the lever being pivotally moved by a workpiece which extends axially in the plates.

Abstract: A die-head of a cutting machine having a pair of relatively rotatable annular plates which retractably hold therebetween cutting tools extending in radial directions, one of the plates being provided with a tool retracting lever which is pivotably mounted thereto and which is engaged by a slide which is slidably arranged on one plate and which tends to rotate together with the other plate by a spring force, the slide being slide to cause relative rotation between the two plates when the lever is pivotally moved by a workpiece which extends axially in the plates.