Patent ID: 7429028
Filing Date: 2008-09-30
Classification: F02M,F16J,F16K

Abstract:
1. An exhaust gas recirculation control valve comprising: a housing; a shaft with a valve disc for opening or closing an exhaust gas passage, said shaft being disposed within the housing; and a sliding shaft support component along which said shaft slides, wherein said sliding shaft support component is provided with at least one seal member, which is a doughnut-shaped plate and is movable and deformable in a certain range, wherein a plug having a portion with which said seal member makes contact when subjected to a pressure from said exhaust gas passage is provided, and wherein said seal member is supported on said shaft, said seal member being made of an elastic member to be deformed according to a pressure difference across said seal member, said seal member is disposed between said sliding shaft support component and said plug, said seal member is axially movable as a whole, in response to said pressure difference across said seal member, between a first position physically separated from said portion of said plug and a second position making contact with said portion of said plug.