Catalytic Apparatus for Motorcycle Exhaust Pipe

Abstract

A catalytic apparatus is used for a motorcycle with an engine. The catalytic apparatus includes an engine exhaust manifold, a silencer, a front exhaust pipe positioned between the engine exhaust manifold and the silencer, a front supply pipe connected to the engine exhaust manifold and configured for supplying secondary air, and at least one catalytic converter positioned in the silencer. A catalyst is coated on an inner wall of the front exhaust pipe. The catalyst receives the secondary air supplied by the front supply pipe to clean engine exhaust gases. Particularly, when the motorcycle is started in a cold state, the present catalytic apparatus can enhance the temperature of the engine exhaust gases, and the at least one catalytic converter can be accelerated to reach its operating temperature.

1 . A catalytic apparatus for a motorcycle with an engine, the catalytic apparatus comprising an engine exhaust manifold, a silencer, a front exhaust pipe positioned between the engine exhaust manifold and the silencer, a front supply pipe connected to the engine exhaust manifold and configured for supplying secondary air, and at least one catalytic canister positioned in the silencer; wherein, catalyst is directly coated on an inner wall of the front exhaust pipe, and the catalyst receives the secondary air supplied by the front supply pipe to clean engine exhaust gases. 
   
   
       2 . The catalytic apparatus as claimed in  claim 1 , wherein the number of the at least one catalytic canister is plural, and the plural catalytic canisters comprise at least one front catalytic canister and at least one rear catalytic canister, and a rear supply pipe is connected between the at least one front catalytic canister and the at least one rear catalytic converter and is also configured for supplying secondary air. 
   
   
       3 . A catalytic apparatus for a motorcycle with an engine, the catalytic apparatus comprising an engine exhaust manifold, a silencer, a front exhaust pipe positioned between the engine exhaust manifold and the silencer, a front supply pipe connected to the front exhaust pipe and configured for supplying secondary air, and at least one catalytic canister positioned in the silencer; wherein, catalyst is directly coated on an inner wall of the front exhaust pipe, and the catalyst receives the secondary air supplied by the front supply pipe to clean engine exhaust gases. 
   
   
       4 . The catalytic apparatus as claimed in  claim 3 , wherein the number of the at least one catalytic canister is plural, and the plural catalytic canisters comprise at least one front catalytic canister and at least one rear catalytic canister, and a rear supply pipe is connected between the at least one front catalytic canister and the at least one rear catalytic canister and is also configured for supplying secondary air.