Patent ID: 6286307
Filing Date: 2001-09-11
Classification: F01N

Abstract:
An improved exhaust gas control device (22) for an engine having an exhaust gas collector pipe (10) extending from an exhaust manifold (12) to a muffler (14) comprising:a hollow pipe (16) having an input end (18) fixedly mounted to said collector pipe (10) between said exhaust manifold (12) and said muffler (14) to receive exhaust gases from said collector pipe (10) and an output end (20) opened to the atmosphere;a slidably mounted gate valve in said hollow pipe having a first closed position directing the flow of exhaust gas through said exhaust gas collector pipe to said muffler and a second open position allowing the flow of exhaust gases directly to atmosphere;an operating mechanism (24) coupled to said slidable gate valve (42) to selectively move said gate valve (42) between said first closed position and second open position;a housing extending from, and forming a part of, said hollow pipe, said hollow pipe being cylindrical in cross section with an inside surface;an annular recess on the inside surface of said hollow pipe; anda circular plate slidably mounted in said housing and forming said gate valve for mating with said annular recess in said first position to close the output end of said hollow pipe and direct said exhaust gases through said muffler when said gate valve is in said first position.