Patent ID: 8303468
Filing Date: 2012-11-06
Classification: F16H,Y10T

Abstract:
1. A power transmission device installed in a vehicle, comprising: a clutch that transmits power from a motor to an axle; a first pump that is driven by power from the motor to generate and output fluid pressure; a second pump that receives and is driven by a supply of electric power to generate and output fluid pressure; a pressure regulating valve that regulates a pressure of operation fluid output from the first pump, and delivers at least a portion of operation fluid discharged in connection with the pressure regulation to a lubrication target for use as lubricant; and a switching valve that switches between a first connection state, wherein when the first pump is driving, operation fluid output from the pressure regulating valve is supplied to the clutch and operation fluid output from the second pump is supplied as lubricant to the lubrication target while a supply of operation fluid from the second pump to the clutch is cut off, and a second connection state wherein, when the first pump is not driving, the supply of operation fluid from the pressure regulating valve to the clutch is cut off and operation fluid output from the second pump is supplied to the clutch while the supply of operation fluid from the second pump to the lubrication target is cut off.