摘要:
A controller that executes engine output control that a throttle is closed when a boat is navigated at a predetermined speed or higher and the output of an engine is gradually increased up to predetermined output when a steering system is steered right or left at a predetermined angle or more is provided. Thus, an overshoot phenomenon that the engine speed is held at a predetermined engine speed after the engine speed once increases up to the predetermined engine speed or higher when the engine speed is increased in deceleration can be avoided. As a result, the body of the boat can be prevented from sliding laterally to a great extent at the beginning of turning and the turning performance of the body can be enhanced.
摘要:
An electronic controller is provided for controlling operation of the engine and/or transmission in a marine propulsion system without use of mechanical linkages. A control allows for setting a desired engine speed signal and a signal link allows for electromagnetically transmitting the desired engine speed signal from the control to the controller. A module allows for supplying to the engine, based on a received signal indicative of actual engine speed and the desired engine speed signal, an engine control signal for adjusting engine speed.
摘要:
A marine drive has an engine, a propeller and a transmission to switch the propeller between a propulsion position and a non-propulsion position. The engine has a combustion chamber. An air induction system communicates with the combustion chamber through an intake port. An exhaust system communicates with the combustion chamber through an exhaust port. Intake and exhaust valves move between an opening position and a closing position of the intake port and the exhaust port, respectively. Intake and exhaust camshafts actuate the intake and exhaust valves, respectively. A VVT mechanism changes an actuating timing of the intake camshaft at which the camshaft actuates the intake valve. An ECU controls the intake camshaft to set the actuating timing at a generally optimum timing. A transmission position change operation sensor senses that the transmission is under operation and sends a signal to the ECU. The ECU controls the VVT mechanism based upon the signal to move the actuating timing away from the optimum timing. Otherwise, a transmission position sensor senses that the transmission is in a neutral position and sends a signal to the ECU. The ECU controls the VVT mechanism based upon the signal to bring the actuating timing to a generally fully retarded timing.
摘要:
The invention concerns a housing (1) for an angle gear box device of a boat propulsion motor designed to be immersed and to contain an angle gear box device comprising: two shafts rotating relatively to two perpendicular axes (XX′, YY′) whereof the first shaft (Y, Y′) is driven in rotation by said motor and a second shaft (XX′) drives at least a propeller in rotation; and mechanical elements comprising gears and roller bearings enabling the transmission of rotation of said first shaft to said second shaft. The invention is characterised in that it comprises two assembled matching half-shells (2) produced from a reinforced synthetic thermoplastic polymer material co-operating with each other along a joint plane defined by said axes (XX′ and YY′) of rotation of said rotary shafts and having each; a receased zone housing said angle gear box device in said joint plane, and a planar support surface (4a, 4b, 4c) external to said recessed zone and acting as support on the matching half-shell.
摘要:
A propulsion system for motor boats is described, wherein the motor unit and the support member for the propeller shaft are mechanically connected together.
摘要:
An outboard motor has a driveshaft housing and a lower unit coupled with each other. A driveshaft, which extends through the driveshaft housing and the lower unit, is divided into upper and lower section. The upper driveshaft section defines splines on a bottom outer surface. The lower driveshaft section defines splines on a top outer surface. A tubular coupling member defines splines on an inner surface thereof. The coupling member couples the bottom outer surface of the first shaft with the top outer surface of the second shaft by the respective splines. In one arrangement, a water pump is driven by the driveshaft. The coupling member is interposed between a rotor of the water pump and respective portions of the first and second shafts. In another arrangement, a bearing unit journals the driveshaft. The coupling member is interposed between a bearing of the bearing unit and the respective portions of the first and second shafts.
摘要:
An idling speed control system for an outboard motor mounted on a boat and equipped with an internal combustion engine, whose output is connected to a propeller through a clutch, having secondary air supplier that supplies secondary air. In the system, a difference of preceding and present current command values each indicative of a desired secondary air supply amount is comparing with a predetermined value when the clutch is changed, and the current command value is increased or decreased by a predetermined correction amount when the difference is greater than the predetermined value. With this, it can surely improve the control stability and suppress the overshooting or undershooting of engine speed due to the load change when the clutch is changed, thereby enabling to eliminate or reducing the shock to be felt by the operator and improving the feeling of the operator.
摘要:
An improved, low horsepower, compact, high driving power, outboard motor having a reducing transmission located in the upper portion of the driveshaft housing and lower unit so as to provide a larger reduction ratio while maintaining a small lower unit to reduce drag.
摘要:
An idling speed control system for an outboard motor mounted on a boat and equipped with an internal combustion engine, whose output is connected to a propeller through a clutch, having secondary air supplier that supplies secondary air. In the system, the engine start-state as to whether the engine has been started is determined and the clutch position is detected and based thereon, the desired idling speed and the desired secondary air supply amount is determined through learning control. With this, the system can therefore accurately determine the desired idling speed and the desired secondary air supply amount and achieve steady idling speed even if load changes owing to a change in clutch position or propeller replacement.
摘要:
Torque fluctuations, which, on one hand, come from the engine, and on the other hand, come from the power take-off side due to the effect of the rudder and beating of the blade, and which are primarily caused by the typically low rotational speed in drives of watercraft, lead to intense vibrations in the hull and generate. noise. A device for transmitting torque in the power train of a watercraft damps torsional vibrations occurring in the power train of a watercraft and, therefore, ensures low-noise and low-vibration operation. The device includes an engine-side, primary flywheel mass, a secondary flywheel mass coupled at the power take-off to a gearbox driving the ship propeller, as well as a torsionally elastic connection disposed therebetween. The special requirements in the power train of a watercraft are satisfied by a secondary flywheel mass, which is coupled to the shaft on the output end and has a high mass moment of inertia, as well as by a large torsion angle between the primary and secondary flywheel masses, which is rendered possible by the design of the elastic coupling.