Patent ID: 8256593
Filing Date: 2012-09-04
Classification: F16D,Y10T

Abstract:
1. A driving force transmitting device mounted on a vehicle including a power plant that is an engine to generate a driving force, an input shaft to which the driving force generated by the engine is inputted, an output shaft to which the driving force inputted to the input shaft is outputted, and a main clutch that intermittently transmits the driving force from the output shaft, comprising: a primary clutch that intermittently transmits the driving force from the input shaft where the primary clutch is located between the input shaft and the main clutch; a hydraulic pump that generates a hydraulic pressure; a piston that presses the primary clutch with the hydraulic pressure generated by the hydraulic pump; a cam mechanism that is fitted to the primary clutch to press the main clutch with a press-contact force amplified larger than a press-contact force of the piston by utilizing the driving force inputted from the input shaft through the primary clutch with the primary clutch engaged by the piston, so as to engage the main clutch; an electric motor for driving the hydraulic pump; hydraulic pressure detecting means for detecting the hydraulic pressure in a supply path communicating with the piston from the hydraulic pump; and control means for controlling the electric motor on the basis of the hydraulic pressure detected by the hydraulic pressure detecting means.