Patent ID: 6279552
Filing Date: 2001-08-28
Classification: F02M,F16K

Abstract:
An exhaust gas re-circulation valve comprisinga valve housing having an inlet and an outlet for exhaust gas connectable to the engine exhaust gas re-circulation passage and, forming on the inlet side, a first side passage and a second side passage branching from the first side passage,first and second passage apertures formed in the branching connecting part of the first and second side passages,first and second valve seats provided on the first and second passage apertures,a valve shaft mounted slidably in the axial direction of the valve housing and first and second valves mounted on the valve shaft and closing in abutment with the first and second valve seats when the valve shaft moves in one direction,wherein in a case, which is formed by a material having the same rate of thermal expansion as the valve shaft and which communicates with the first and second side passages, is fixed to the valve housing and the first and second valve seats are fixed to the case.