Hydraulic clutch control device of vehicle power unit

摘要

A hydraulic clutch control device of a vehicle power unit in which the oil pressure control valve is prevented from being exposed above the oil level even when a vehicle body inclines frontward or rearward. A housing chamber housing an actuator is formed in a housing chamber forming body attached to an engine main body and an oil pressure control valve partially facing the housing chamber is supported by the housing chamber forming body. An oil return hole used to return excess hydraulic oil from the housing chamber into the engine main body is provided in the housing chamber forming body to communicate with an upper portion of the housing chamber at an end portion of the housing chamber on a side close to the oil pressure control valve.

主权项

1. A hydraulic clutch control device for a hydraulic clutch of a power transmission system of a vehicle power unit, the vehicle power unit including an internal combustion engine having an engine main body mounted on a vehicle-body frame, the hydraulic clutch control device comprising:
an oil pressure control valve and an actuator disposed in the engine main body, the oil pressure control valve being capable of controlling an oil pressure of the hydraulic clutch and arranged to have an operating direction extending in a front-rear direction of the vehicle-body frame, the actuator being serially connected to the oil pressure control valve in the operating direction to drive the oil pressure control valve; a housing chamber that houses at least the actuator and is filled with hydraulic oil, the housing chamber being formed in a housing chamber forming body attached to the engine main body and the oil pressure control valve partially facing the housing chamber being supported by the housing chamber forming body, the housing chamber forming body including a supporting holder that is attached to the engine main body with the oil pressure control valve being fitted to and supported by the supporting holder; and an oil return hole used to return an excessive portion of the hydraulic oil from the housing chamber into the engine main body is provided in the housing chamber forming body to communicate with an upper portion of the housing chamber at an end portion of the housing chamber on a side close to the oil pressure control valve, wherein part of the supporting holder is cut away to form the oil return hole opening upward and laterally in an upper portion of the supporting holder and an eaves portion covering the oil return hole from above protrudes integrally from the supporting holder.