Suzuki Motor Corporation

Ikuo Yamada

Tatsushi Uchiyama

A multistage transmission device includes a plurality of driving gears provided in a countershaft, a plurality of driven gears meshing with the driving gears, respectively, dog rings that switch mechanical connection or disconnection between the drive shaft and each of the driven gears, and one-way clutches arranged between the countershaft and the driving gears. The one-way clutches transmit rotation of the countershaft to the driving gears when the rotation of the countershaft is faster than the rotation of the driving gears.

Multistage transmission device

A crank chamber internal pressure reduction mechanism for internal combustion engine includes a crankshaft, a rotating shaft (a balancer shaft), a suction mechanism (a primary drive gear), a first discharge passage (a discharge passage, a joining passage, and a discharge hose), and a second discharge passage (a discharge passage). The crankshaft is rotatably supported to a crankcase. To the rotating shaft, a rotation force is transmitted from the crankshaft. The suction mechanism is disposed at the rotating shaft. The suction mechanism rotates integrally with the rotating shaft. To the first discharge passage, the emission is discharged from the crank chamber. The second discharge passage is communicated with the first discharge passage. The second discharge passage is disposed inside the rotating shaft. The suction mechanism includes a third discharge passage (a hole). The third discharge passage is communicated with the second discharge passage. The third discharge passage extends outside the rotating shaft in a radial direction to communicate with an external space.

Crank chamber internal pressure reduction mechanism for internal combustion engine

A cooling water passage structure of internal combustion engine includes a cylinder-block-side cooling water passage, a cylinder-head-side cooling water passage, a heat exchanger, and cooling water passage pipes. The cylinder-block-side cooling water passage is formed inside a cylinder block of an engine to cause cooling water to flow through. The cylinder-head-side cooling water passage is formed inside a cylinder head to cause cooling water to flow through. The heat exchanger is configured to dissipate heat of cooling water to external air to decrease a temperature of the cooling water. The cooling water passage pipes couple the heat exchanger and the engine to exchange cooling water. The cylinder head includes a cooling water inlet. The cooling water passage pipe is coupled to the cooling water inlet. The cooling water from the heat exchanger flows into the cooling water inlet.

Cooling water passage structure of internal combustion engine

A clutch () includes: a clutch housing () which is provided with a drive plate () to be movable in an axial direction; a clutch hub () which transmits a rotary motive power to an output shaft; a clutch sleeve () which is provided with a driven plate () to be movable in the axial direction; and a pressure disk () which biases the drive plate () and the driven plate () toward the clutch hub (), further includes a back torque limiter () which moves the pressure disk () in a direction away from the clutch hub () when back torque is applied, and the clutch hub () is provided with a restricting apparatus which restricts movement of the pressure disk () in the direction away from the clutch hub () when a number of rotations of the output shaft is less than a predetermined value.

Clutch with back torque limiter

A motorcycle having a head pipe, a vehicle body frame including a pair of left and right main flames extending rearward from the head pipe, and an engine below the vehicle body frame and including a cylinder having an inclined cylinder axis, and an intake device. The intake device has an air cleaner box above the engine and the main frames; a throttle body provided with throttle bores and a valve shaft penetrating the throttle bores, the throttle body is located on a rear side of the engine between the pair of left and right main frames and guides intake air from the air cleaner box to the engine; and a measuring device located on a rear side of the throttle body which rotates about a rotational shaft parallel to the valve shaft to measure a throttle operation amount.

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Hamamatsu, Japan

Ikuo Yamada