Manifold assembly with three-way catalyst

Abstract

The invention provides a manifold assembly with a three-way catalyst. The manifold assembly comprises air inlet flanges of a thermal deformation resistant groove, four exhaust manifolds, a catalyst body and an air outlet flange. The front faces of the air inlet flanges are directly connected with an engine, the back faces of the air inlet flanges are connected with the air inlet ends of the four exhaust manifolds respectively, and the other ends of two exhaust manifolds are made to be in D shapes to be jointed through pipe end forming and are connected with the catalyst body; the other ends of the other two exhaust manifolds are made to be in D shapes to be jointed through pipe end forming and are connected with the catalyst body, and the catalyst body is directly connected with the air outlet flange. The ignition time of the catalyst is shortened, and work temperature is improved.

Description

technical field [0001] The invention relates to an automobile exhaust system, in particular to a manifold assembly with a three-way catalytic converter. Background technique [0002] In the prior art, the general catalytic converter body is generally installed on the exhaust pipe assembly behind the exhaust manifold of the engine, so limited by the space position of the chassis of the automobile, the distance between the catalytic converter and the engine is generally more than 500mm. Far, the ignition time of the catalytic converter is longer, and the ignition temperature of the catalytic converter is about 280°C, and the working temperature is not less than 400°C. Therefore, the purification effect is not good at cold start, and it is difficult to reach the National IV. Especially in China V, all cars must adopt manifolds with three-way catalysis, and the manifolds are completely converted from cast iron manifolds to thin-walled manifolds (assemblies) with three-way cataly...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the general catalytic converter body is generally installed on the exhaust pipe assembly behind the exhaust manifold of the engine, so limited by the space position of the chassis of the automobile, the distance between the catalytic converter and the engine is generally more than 500mm. Far, the ignition time of the catalytic converter is longer, and the ignition temperature of the catalytic converter is about 280°C, and the working temperature is not less than 400°C. Therefore, the purification effect is not good at cold start, and it is difficult to reach the National IV. Especially in China V, all cars must adopt manifolds with three-way catalysis, and the manifolds are completely converted from cast iron manifolds to thin-walled manifolds (assemblies) with three-way catalysis

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