Patent ID: 9688140
Date: 2017-06-27
CPC Classifications: B60K,F16D,F16H

Claim:
1. A drive force distribution device for an automobile, comprising left and right hydraulic clutches for transmitting a driving force of a drive source to left and right axles, each of the left and right hydraulic clutches comprising: an annular oil groove opposing a clutch piston in an inner wall face of a clutch oil chamber; and a hydraulic oil supply port and a hydraulic oil discharge port communicating with the annular oil groove, wherein the annular oil groove comprises a short oil groove section and a long oil groove section, a first end of the short oil groove section is located adjacent the hydraulic oil supply port and a second end of the short oil groove section is located adjacent the hydraulic oil discharge port, and a cross-sectional area of the long oil groove section is larger than a cross-sectional area of the short oil groove section.