Patent ID: 7036310
Filing Date: 2006-05-02
Classification: B60K,B60W,F16H,Y02T,Y10T

Abstract:
1. A hydraulic controller for a hydraulic actuator incorporated into a power transmission mechanism for switching between on and off states of a power transmission, having a hydraulic circuit arranged to supply oil from a hydraulic pump to the hydraulic actuator via a regulator valve, a one-way valve, and a control valve for controlling an operation of the hydraulic actuator, the hydraulic circuit including an accumulator capable of accumulating a hydraulic pressure necessary for the operation of the hydraulic actuator, the accumulator being connected to an oil supply passage connecting the one-way valve and the control valve, and an oil passage for lubricating the power transmission mechanism connected to the regulator valve in the drain side thereof, the hydraulic controller comprising: hydraulic pressure monitoring means for monitoring a hydraulic pressure of the oil supply passage; hydraulic pressure switching means capable of freely switching a setting pressure of the regulator valve between a low pressure and a high pressure; and control means for controlling said hydraulic switching means so as to switch the setting pressure of the regulator valve between the low pressure and the high pressure according to the hydraulic pressure of the oil supply passage monitored by said hydraulic pressure monitoring means.