Vorrichtung zur Antriebskraftverteilung

摘要

The present invention provides a driving force distributing apparatus which can instantaneously reduce clutch pressure to thereby carry out proper operation of an ABS even if the ABS is actuated while the vehicle is travelling in a 4WD mode. In order to reduce pressure in a piston chamber, a control circuit drives a motor and pump in reverse rotation. As a result, a pressure difference between a piston chamber side pressure and a pump side pressure in a supply path becomes large, pressure oil on a piston chamber side in the supply path is instantaneously discharged to an outside from a releasing hole of a quick open valve, and the pressure in the piston chamber reduces instantaneously.