Patent ID: 6681912
Filing Date: 2004-01-27
Classification: B60K,F16D

Abstract:
A driving force distributing apparatus for pressing a multiple disc clutch with a predetermined pressing force by a pressing member to transfer a driving force from a prime mover to a front wheel and a rear wheel in distributing proportions corresponding to said predetermined pressing force, said apparatus comprising:a piston for pressing said multiple disc clutch through said pressing member; a pump for supplying pressure fluid to a piston chamber, said pressure fluid being for generating said pressing force for pressing said pressing member in said piston; a motor for driving said pump for normal rotation to supply said pressure fluid to said piston chamber; pressure fluid discharging means provided to a pressure fluid supply path extending from said pump to said piston chamber to discharge said pressure fluid on a piston chamber side in said pressure fluid supply path to an outside when a pressure difference between pressure on said piston chamber side and pressure on a pump side in said pressure fluid supply path becomes equal to or greater than a predetermined value; and control means for driving said motor for normal rotation to drive said pump for normal rotation in increasing pressure in said piston chamber and for driving said motor for reverse rotation to drive said pump for reverse rotation to make said pressure difference equal to or greater than said predetermined value in reducing said pressure in said piston chamber.