EXHAUST CONTROLLER FOR ENGINE

摘要

PURPOSE:To prevent the biting of valve by arranging a plurality of exhaust pipes in single parallel row with the valves being arranged in respective pipes on a single shaft then arranging a thrust bearing at one end of the shaft and making the exhaust pipes and the valve bodies more eccentric as they depart further from the thrust bearing. CONSTITUTION:Plural exhaust pipes of a multi-cylinder are arranged in parallel into single row and valves 42a-42d for restricting the exhaust gas disposed in the exhaust pipes are arranged on a single shaft. A thrust bearing 44 is arranged at one end of the shaft and a drive pulley 52 is arranged at the other end. The centers A1-A4 of the valves provided on the shaft are arranged against the centers B1-B4 of the exhaust pipes such that the eccentricities l1-l4 are increased as they depart from the thrust bearing 44. Although the shaft expands thermally when the engine is operated, said eccentricity prevents the biting of valve in the exhaust pipe.