DRIVE FORCE DISTRIBUTION DEVICE FOR AUTOMOBILE

摘要

A drive force distribution device for an automobile is provided in which a hydraulic clutch includes an annular oil groove opposing a clutch piston in an inner all face of a clutch oil chamber, and a hydraulic oil supply port and a hydraulic oil discharge port communicating with the oil groove. Since when the hydraulic oil supply port of the oil groove is a starting end and the hydraulic oil discharge port of the oil groove is a finishing end, a cross-sectional area of a longer oil groove section of the annular oil groove is set to be larger than a cross-sectional area of a shorter oil groove section, the flow path resistance of the oil groove sect of the respective hydraulic clutches made to be uniform. This enables smooth operation, improvement of the engagement responsiveness and uniformization of the engagement responsiveness of the hydraulic clutches to be achieved.

主权项

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, the hydraulic clutch 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 is formed of a shorter oil groove section and a longer oil groove section and, if the hydraulic oil supply port of the annular oil groove is a starting end of the oil groove sections and the hydraulic oil discharge port of the annular oil groove is a finishing end of the oil groove sections, a cross-sectional area of the longer oil groove section is set to be larger than a cross-sectional area of the shorter oil groove section.