EXHAUST SYSTEM OF V-SHAPED ENGINE, WHICH IS CAPABLE OF IMPROVING FLOW EQUALIZATION CHARACTERISTIC OF EXHAUST GAS BY ADDING HEAT PROTECTOR

摘要

PURPOSE: An exhaust system of a V-shaped engine is provided to improve the composition of a joining portion of both front exhaust pipes disposed in front of a main catalytic converter, to improve the flow equalization characteristic of the exhaust gas by adding a heat protector, and to keep the catalyst-activation temperature of the exhaust gas. CONSTITUTION: Left and right front exhaust pipes are connected by exhaust manifolds and UCCs(Under-Floor Catalytic Converter,5,7) formed at both sides of a V-shaped engine, and linked with a front end of a center exhaust pipe(17) having both ends which are connected to form a joining portion(13) and to compose a main catalytic converter and a center muffler. A rear exhaust pipe branched off to form each main muffler is connected at a rear end of the center exhaust pipe. For the joining portion, one front exhaust pipe is formed in a bent shape to set the mutual connection angle of the left and right front exhaust pipes within 20 degrees and to set each connection angle of the front exhaust pipes for the center exhaust pipe 60 degrees. A main heat protector(19) connected with the joining portion of the left and right front exhaust pipes is disposed on the center exhaust pipe. An auxiliary heat protector is arranged at longer one of the front exhaust pipes.