摘要:
A power unit for a saddle-ride vehicle includes a transmission mechanism disposed in the course of power transmission between a crankshaft and a drive wheel is installed in a crankcase, and a shift actuator to drive and control the gear-shifting action of the transmission mechanism is disposed in the engine main body. The shift actuator is attached to a side surface of the crankcase 35 while the operational axis of the shift actuator is placed in a plane that is orthogonal to the axial direction of a transmission mechanism. The shift actuator is disposed so that a high degree of freedom in the layout is guaranteed for the functional parts disposed around the crankcase. At the same time, the amount of outward protrusion from the crankcase is reduced and the maintenance work is made.
摘要:
A clutch control apparatus for receiving an air flow more easily and to obtain a higher cooling performance in a power unit for a saddle-ride type vehicle while avoiding the size of the main engine body becoming larger in the front-and-rear direction. The power unit includes a clutch apparatus installed in a clutch chamber. The clutch apparatus is disposed in the course of power transmission from a crankshaft to a drive wheel. The clutch chamber is formed between a crankcase and a clutch cover that is coupled to a side surface of the crankcase. A clutch control apparatus that controls the switching of the connection and disconnection actions of a clutch apparatus is attached to the outer surface of a clutch cover in a position at a side of a cylinder block.
摘要:
A power unit for a saddle-ride vehicle includes a transmission mechanism disposed in the course of power transmission between a crankshaft and a drive wheel is installed in a crankcase, and a shift actuator to drive and control the gear-shifting action of the transmission mechanism is disposed in the engine main body. The shift actuator is attached to a side surface of the crankcase 35 while the operational axis of the shift actuator is placed in a plane that is orthogonal to the axial direction of a transmission mechanism. The shift actuator is disposed so that a high degree of freedom in the layout is guaranteed for the functional parts disposed around the crankcase. At the same time, the amount of outward protrusion from the crankcase is reduced and the maintenance work is made
摘要:
A power unit for a small type vehicle wherein a speed change mechanism is disposed on a lateral side of a crankcase on the side of one end of a crankshaft. A valve operation controller for controlling the operations of valve operation mode change mechanisms and a speed change controller for controlling a speed change operation of a speed change mechanism are attached to an engine body, to lay out the valve operation controller and the speed change controller in good balance of center of gravity so as to prevent the center of gravity of the power unit from being deviated to one side. The valve operation controller and the speed change controller being attached to the engine body on the opposite side of the clutch device with respect to a vehicle body center line in a direction along the axis of the crankshaft.
摘要:
In a motorcycle-use power unit in which a clutch device arranged in a power transmission path between a crankshaft and a drive wheel is housed in a clutch chamber which is defined between a crankcase and a clutch cover joined to a side surface of the crankcase, the maintenance of the clutch control device can be easily performed while preventing a lowering of oil-pressure transmission efficiency between the clutch device and the clutch control device and preventing an increase in the weight of the motorcycle. A clutch control device performs a changeover of engagement and disengagement of a clutch device by controlling the oil pressure applied to the clutch device. Oil passages for connecting the clutch control device and the clutch device with each other are mounted on a clutch cover.
摘要:
A shift drum drive system for a transmission includes a drive member and a power transmission device configured to transmit the rotational power of the drive member to a shift drum. The drive member and at least a part of the power transmission device being disposed on a lateral side of a crankcase on the side of one end in the axial direction of the shift drum, to reduce the area occupied by the shift drum drive system inclusive of the drive member on a lateral side of the crankcase on the side of one end in the axial direction of the shift drum, and thereby to contrive a reduction in engine size. The drive member and the shift drum are disposed so as to at least partly overlap with each other when viewed along the axial direction of the shift drum.
摘要:
A shift drum drive system for a transmission includes a drive member and a power transmission device configured to transmit the rotational power of the drive member to a shift drum. The drive member and at least a part of the power transmission device being disposed on a lateral side of a crankcase on the side of one end in the axial direction of the shift drum, to reduce the area occupied by the shift drum drive system inclusive of the drive member on a lateral side of the crankcase on the side of one end in the axial direction of the shift drum, and thereby to contrive a reduction in engine size. The drive member and the shift drum are disposed so as to at least partly overlap with each other when viewed along the axial direction of the shift drum.
摘要:
A clutch control apparatus for receiving an air flow more easily and to obtain a higher cooling performance in a power unit for a saddle-ride type vehicle while avoiding the size of the main engine body becoming larger in the front-and-rear direction. The power unit includes a clutch apparatus installed in a clutch chamber. The clutch apparatus is disposed in the course of power transmission from a crankshaft to a drive wheel. The clutch chamber is formed between a crankcase and a clutch cover that is coupled to a side surface of the crankcase. A clutch control apparatus that controls the switching of the connection and disconnection actions of a clutch apparatus is attached to the outer surface of a clutch cover in a position at a side of a cylinder block.
摘要:
A power unit for a small-sized vehicle that includes a valve operating system equipped with a hydraulic valve operation mode change mechanism capable of changing the operational mode of an engine valve, and a clutch device disposed between a crankshaft and a shift mechanism so as to switch hydraulically between connection and disconnection of power transmission, wherein a discharge outlet of one oil pump (209) driven by power transmission from the crankshaft is connected in common to a valve operation mode change mechanisms (63, 64) and a clutch device (102). This enables the hydraulic system to be made compact while avoiding any increase in the overall bulk of the power unit, thus providing a power unit suitable for a small-sized vehicle.
摘要:
A power unit includes a transmission mechanism installed in a crankcase with a clutch apparatus for connecting and disconnecting the transmission of power between a crankshaft and the transmission mechanism being installed in a clutch chamber. An oil filter is set between an oil pump driven by the power transmitted from the crankshaft and portions to be supplied with oil is attached to a clutch cover. The provided power unit guarantees a certain degree of freedom in design for the size of the inner diameter of the cylinder bore, the location of the timing transmission mechanism, and the like. A smaller size of the power unit along the axial direction of the crankshaft needs to be achieved. The oil filter is disposed between the axis of the crankshaft and the axis of the clutch apparatus and below the axis of the crankshaft and the axis of the clutch apparatus.