Patent ID: 6309030
Filing Date: 2001-10-30
Classification: B60T

Abstract:
A multi-way control valve for slip-controlled hydraulic automotive vehicle brake systems, for providing a flow connection between at least one wheel brake and a high-pressure source or a low-pressure accumulator by way of several ports on the multi-way control valve, comprising:a slide guided in a sleeve-shaped housing member, the slide having a first control edge and providing, along with a corresponding control edge on the housing member, a first variable throttle cross-section in the hydraulic pressure fluid connection between the port of the high-pressure source and the port of the wheel brake, wherein the slide is biased in the direction of a first end position in which the port of the wheel brake is connected to the port of the high-pressure source in terms of flow and isolated from the port of the low-pressure accumulator in terms of flow,a valve residing between the port of the wheel brake and the port of the low-pressure accumulator which is closed in the normal braking operation and opened for pressure reduction in the wheel brake,a valve member which closes the valve between the port of the wheel brake and the port of the low-pressure accumulator is provided by the slide, wherein in its closed condition, said valve is configured as a seat valve, wherein both front surfaces of the slide are acted upon by hydraulic medium to which the pressure prevailing on the wheel brake is applied and wherein the hydraulic medium escapes to the port of the low-pressure accumulator when the seat valve is opened.