Patent ID: 11926273
Assignee: HONDA MOTOR CO., LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F  Y | IPC B  F

Claim 0:
1. A hydraulic circuit for a vehicle driving device, comprising:
an oil pump which discharges oil;
a clutch oil passage connected to an oil chamber of a clutch provided in a power transmission path which transmits power from a power source of a vehicle to driving wheels;
a cooling oil passage for guiding oil to a cooled portion of the vehicle;
a pressure regulating valve which regulates a pressure of oil discharged from the oil pump;
a shift valve which switches a path of the oil regulated by the pressure regulating valve, wherein supply of oil to the clutch oil passage and the cooling oil passage is switched by switching of the pressure regulating valve and the shift valve;
a water-cooled type oil cooler which cools oil flowing through the cooling oil passage by cooling water of the vehicle;
a first temperature sensor which detects a temperature of oil flowing through the cooling oil passage; and
a switching valve which switches presence/absence of supply of the cooling water to the oil cooler according to the detected temperature of the first temperature sensor, and
the cooling oil passage comprises:
a shaft center cooling oil passage which supplies cooling oil to a shaft center of a rotation shaft of an electric motor mounted on the vehicle; and
a cooling oil passage shift valve which switches presence/absence of supply of oil to the shaft center cooling oil passage.