HYDRAULIC CONTROL DEVICE FOR VEHICLE WITH AUTOMATIC STOP ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a simple and low-cost oil pressure control device by opening and closing an oil passage with oil pressure of a first hydraulic source as a signal pressure. SOLUTION: In a vehicle with an automatic stop engine which is temporarily stopped when specified operation conditions are satisfied, and which is automatically stopped and then restarted when specified operation conditions are satisfied, it is provided with a first oil pressure source 5 driven by the engine 1 to supply oil pressure to a continuously variable transmission 4, a second oil pressure source 6 to supply oil pressure to the continuously variable transmission 4 while the engine 1 is automatically stopped, and an oil pressure changing valve 16 provided in an oil passage between the first oil pressure source 5 and the continuously variable transmission 4 to be opened when oil pressure of the first oil pressure source 1 rises.