A three-way catalytic converter thermal management system

Abstract

The invention discloses a thermal management system of a three-way catalytic converter, which is applied to a natural gas engine, comprising an exhaust tailpipe for discharging exhaust gas produced by the combustion of the natural gas engine, and a turbine and a three-way catalytic converter are arranged on the exhaust tailpipe The exhaust tailpipe is provided with a burner for heating the exhaust gas in the exhaust tailpipe, and the burner is located upstream of the three-way catalytic converter; the gas intake port of the burner is connected with the intake manifold of the natural gas engine through the gas intake pipe , the air intake pipe is provided with an air storage tank, a first one-way valve located upstream of the air storage tank, a solenoid valve and a second one-way valve located downstream of the air storage tank. The thermal management system increases the temperature of the exhaust gas upstream of the three-way catalytic converter by igniting and burning the igniter in the burner, thereby avoiding the problem of low-temperature emission of the three-way catalytic converter; through high temperature and constant temperature control of the exhaust gas temperature and The increase of the exhaust gas flow can speed up the aging simulation of the three-way catalytic converter and reduce the occupation of resources.

Description

Technical field [0001] The present invention relates to the field of thermal management, and more particularly to a three-way catalyst heat management system. Background technique [0002] With the implementation of the Six emission regulations, the durability of emission limits and emission control devices has clear requirements, how to control emissions and how to develop effective emission control devices have become an important topic of enterprises. For Six equivalent natural gas engines, the ternary catalyst is the only emission control device, and its catalytic efficiency directly determines the level of emissions of the engine, and the durable assessment of the three-way catalyst is to ensure the most effective measures for emissions. At present, in order to reduce the amount of precious metal dosage of the ternary catalyst to reduce the cost, it has been greatly adjusted in transient control strategies, but the minimum precious metal is still limited to low temperature e...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a three-way catalytic converter thermal management system to solve the problems of three-way catalytic converter low-temperature emission and durability assessment occupying many resources and inaccurate simulation

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