Patent ID: 6142751
Filing Date: 2000-11-07
Classification: B60T

Abstract:
A hydraulic unit of a vehicle brake system, comprising a housing block, at least one piston pump inside the housing block with a piston and one cam element that displaces the piston, a cam element chamber in which the cam element is rotatable, a motor for driving the cam element, at least one electrically controllable valve, and at least one reservoir, associated with one inlet of the at least one piston pump, said reservoir comprises a cylinder, a storage piston displaceable in the cylinder, said storage piston divides the cylinder into a variable storage chamber and a spring chamber, a spring which loads the storage piston and is supported indirectly on the housing block, and a closure element that closes the spring chamber relative to the environment, wherein a pressure equalization conduit begins at the spring chamber, leads to the motor, and communicates with the interior thereof, a leakage-diverting conduit (101, 102, 103) that begins at a low point of the cam element chamber (9) and extends to the at least one spring chamber (30b, 31b) and discharges into the at least one spring chamber.