Tight coupling type gas exhaust system assembly

Abstract

The invention relates to the field of gasoline engine gas exhaust systems, in particular to a tight coupling type gas exhaust system assembly. The tight coupling type gas exhaust system assembly comprises a gas exhaust manifold assembly, a three-way catalytic converter, a particle collector and a connecting barrel body, wherein one end of the three-way catalytic converter is connected with the gasexhaust manifold assembly, and the other end of the three-way catalytic converter is connected with the particle collector through the connecting barrel body; the gas exhaust manifold assembly, the three-way catalytic converter and the particle collector are arranged in an engine cabin. According to the tight coupling type gas exhaust system assembly disclosed by the invention, the tight couplingtype gas exhaust tube assembly, the three-way catalytic converter and the particle collector are connected oppositely to form barrel type catalytic purifying package, and therefore, fast light-off ofthe three-way catalytic converter is facilitated, the problems that a multi-stage catalyst pipeline is too long, is low in exhausted waste gas temperature, and is not beneficial for generating chemical reaction with a catalyst are solved, pollutant emission in tail gas can be effectively controlled, and encapsulating difficulty further can be reduced.

Description

technical field [0001] The invention relates to the field of gasoline engine exhaust systems, in particular to a close-coupled exhaust system assembly. Background technique [0002] As emission regulations become more stringent, the amount of particulate matter in the exhaust of gasoline engines is restricted even more stringently. It is difficult for the existing three-way catalytic converter to control the emission of particulate matter while controlling the emission of carbon monoxide, hydrocarbons, nitrogen oxides, and unburned gasoline vapor. In order to make the gasoline engine meet the National VI emission standard, it is necessary to introduce a particle filter (GPF) to achieve the purpose of controlling the emission of particulate matter. [0003] In the existing automobile engine exhaust system, each branch pipe of the exhaust manifold and the collecting pipe occupy a large space, and the corresponding catalytic converter space is relatively small. Usually, the ca...

AI Technical Summary

Problems solved by technology

The close-coupled exhaust pipe assembly provided by the present invention, the three-way catalytic converter and the particle trap are connected to the opposite sex to form a cylindrical catalytic purification package, which is conducive to the rapid light-off of the three-way catalytic converter and solves the problem of The pipeline of the multi-stage catalytic converter is too long, and the temperature of the exhaust gas is lowered, which is not conducive to the chemical reaction with the catalyst. It can effectively control the emission of pollutants in the exhaust gas and reduce the difficulty of packaging.

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