摘要:
A dog-clutch transmission system having dog-clutches is provided that can effectively lower the sound resulting from the engagement of dogs during the meshing of gears. A dog-clutch transmission system includes first gears installed adjacent to each other on respective shafts so as not to be rotatable relatively to the respective shafts and to be axially slidable; and second gears installed so as to be rotatable relatively to the respective shafts and not to be axially slidable. Each of the first gears has dog-teeth projecting in the axial direction and each of the other gears has dog-holes recessed in the axial direction. Speed-stages are switchable by bringing the dog-teeth and the dog-holes into engagement and disengagement. A speed-change ratio proportion of a change-speed ratio at an arbitrary n-speed speed-stage to a speed-change ratio at a (n+1)-speed speed-stage is set at 0.725 or more.
摘要:
A dog-clutch transmission system having dog-clutches is provided that can effectively lower the sound resulting from the engagement of dogs during the meshing of gears. A dog-clutch transmission system includes first gears installed adjacent to each other on respective shafts so as not to be rotatable relatively to the respective shafts and to be axially slidable; and second gears installed so as to be rotatable relatively to the respective shafts and not to be axially slidable. Each of the first gears has dog-teeth projecting in the axial direction and each of the other gears has dog-holes recessed in the axial direction. Speed-stages are switchable by bringing the dog-teeth and the dog-holes into engagement and disengagement. A speed-change ratio proportion of a change-speed ratio at an arbitrary n-speed speed-stage to a speed-change ratio at a (n+1)-speed speed-stage is set at 0.725 or more.
摘要:
A crankcase of an internal combustion engine includes protruding portions formed on an outer surface of the crankcase which are constituted of a pair of left and right wall members, and a vibration isolating rubber is fitted between the wall members. The crankcase configured n this manner prevents the generation of sounds from a protruding portion of the crankcase and is light-weight.
摘要:
A muffler for efficiently reducing noise. Front side exhaust pipes and rear side exhaust pipes extend from front cylinders and rear cylinders, respectively, of a V-type water-cooled 4-cylinder engine and are operatively connected to a catalyst chamber disposed below a crankcase. The catalyst chamber is connected to an exhaust chamber located to the rear thereof in which exhaust gas is expanded. An outlet pipe laterally projects from a lateral surface of a rear end portion of the exhaust chamber and is connected to a front pipe projecting from the lateral surface of the front portion of a muffler. The front pipe is transversely inserted into the muffler to increase a cross-section ratio, thereby efficiently reducing noise.
摘要:
A saddle-type vehicle includes a passenger step member, a brake pedal, a step holder having the passenger step member and the brake pedal mounted thereon, and a master cylinder adapted to convert a tread force from the brake pedal into brake pressure. The master cylinder is mounted on a support bracket, which is separate from the step holder. The support bracket and the step holder are temporarily assembled with each other, and are co-fastened to a vehicle body frame of the vehicle such that a gap is formed between the support bracket and the step holder. During operation of the vehicle, such configuration of the support bracket and the step holder having the gap formed therebetween minimizes transmission of vibration from the support bracket to the step holder.
摘要:
A crankcase of an internal combustion engine includes protruding portions formed on an outer surface of the crankcase which are constituted of a pair of left and right wall members, and a vibration isolating rubber is fitted between the wall members. The crankcase configured in this manner prevents the generation of sounds from a protruding portion of the crankcase and is light-weight.
摘要:
To provide a multiple disc clutch in which the engagement/disengagement timing of the clutch can be adjusted to a fixed value, and an assembling method for the multiple disc clutch. Two kinds of clutch discs different at least in thickness are combined, and the clutch disc or discs are replaced with the clutch disc or discs of other thickness so that the total thickness of a required number of the combined clutch discs when a predetermined pressure is applied thereto will be equal to a predetermined size, whereby the total thickness is adjusted.
摘要:
A saddle-type vehicle includes a passenger step member, a brake pedal, a step holder having the passenger step member and the brake pedal mounted thereon, and a master cylinder adapted to convert a tread force from the brake pedal into brake pressure. The master cylinder is mounted on a support bracket, which is separate from the step holder. The support bracket and the step holder are temporarily assembled with each other, and are co-fastened to a vehicle body frame of the vehicle such that a gap is formed between the support bracket and the step holder. During operation of the vehicle, such configuration of the support bracket and the step holder having the gap formed therebetween minimizes transmission of vibration from the support bracket to the step holder.
摘要:
A muffler for efficiently reducing noise. Front side exhaust pipes and rear side exhaust pipes extend from front cylinders and rear cylinders, respectively, of a V-type water-cooled 4-cylinder engine and are operatively connected to a catalyst chamber disposed below a crankcase. The catalyst chamber is connected to an exhaust chamber located to the rear thereof in which exhaust gas is expanded. An outlet pipe laterally projects from a lateral surface of a rear end portion of the exhaust chamber and is connected to a front pipe projecting from the lateral surface of the front portion of a muffler. The front pipe is transversely inserted into the muffler to increase a cross-section ratio, thereby efficiently reducing noise.
摘要:
A multicylinder internal combustion engine, which can simplify its control and is advantageous against thermal loads or vibrations includes a cylinder head with intake valves and exhaust valves arranged therein. Valve actuators are provided for openably operating the intake valves and exhaust valves, respectively. A cylinder head cover forms, in combination with the cylinder head, a valve actuator chamber with the valve actuators accommodated therein. At least some of the valve actuators are deactivatable to disable their corresponding cylinders. The multicylinder internal combustion engine is a V-shaped internal combustion engine provided with a front bank and rear bank. The cylinders on opposite ends in a direction of a crankshaft are set as full-time operating cylinders.