| 摘要 |
PURPOSE:To enhance the running performance of a vehicle by coupling one of front and rear wheels with a power unit for driving it and coupling the other with the power unit through a differential operation control clutch operative when a relative rotational speed between input and output members is increased. CONSTITUTION:A power unit P comprising an engine E and a transmission M is mounted on the front of the body of a vehicle and the power from the power unit is transmitted to a pair of front axles Af through a front differential gear Df. A pair of rear axles Ar are coupled with each other through a rear differential gear Dr. The front and rear differential gears Df and Dr are connected by a propeller shaft S having a differential operation control clutch C midway. When a relative rotational speed between the front and rear axles Sf and Sr, respectively, comprised of the propeller shaft S is increased to raise an oil temperature due to the shearing energy from clutch plates 8 and 9, the differential operation control clutch C becomes operative due to the rise in pressure within an enclosed oil chamber 3 and the distortion of the clutch plates 8 and 9 both because of the oil temperature rise.
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