Patent ID: 6085525
Filing Date: 2000-07-11
Classification: F02D

Abstract:
A valve device, comprising:a housing with an inlet and an outlet to be connected to an exhaust conduit in an internal combustion engine;an exhaust passage disposed between said inlet and outlet;a valve body, which can be set in various positions between an open and a closed condition to vary a flowthrough area of said exhaust passage; andoperating means for setting said valve body,wherein said housing has a cylinder communicating with said exhaust passage,said cylinder having a piston therein comprising a distal end which is displaceable into said exhaust passage,said piston having a distal valve disc and a proximal valve disc located at said distal end and at an opposing proximal end of said piston, respectively,said proximal valve disc, in an extended position of said piston abutting against a proximal seat in said cylinder, andsaid distal valve disc, in a retracted position of said piston, abutting against a distal seat in said cylinder.