Patent ID: 6604727
Filing Date: 2003-08-12
Classification: F02M,F16K

Abstract:
A control valve for a motor vehicle for controlling an overflow of an exhaust-gas from an exhaust duct into an intake duct having a pressure differing from a pressure in the exhaust duct comprising a valve body prestressed against a valve seat, a control device for moving the valve body, and a movable pressure compensating element which is subjected to pressure difference between the ducts and is connected to the valve body, said pressure compensating element has essentially the same cross-sectional area as the valve body and said pressure compensating element equalizing pressure between the ducts thereby compensating for the pressure forces acting on the valve body, wherein the ducts (1, 2) are sealed off relative to one another in a region of the pressure compensating element (8, 17, 26) and whereby the valve body can be raised with minimal force by the control device,wherein a part of the exhaust duct is surrounded by the intake duct having a C-shaped cross section, the valve body and the pressure compensating element each of which is arranged in one of the legs of the intake duct, the pressure compensating element (17) has a disc (19) fastened to valve shaft (18) and a diaphragm (20) fastened to the disc (19), the valve body (16) fastened to the valve shaft (18) and prestressed against the valve seat (21).