Three-way catalyst heat management system

Abstract

The invention discloses a three-way catalyst heat management system applied to a natural gas engine. The three-way catalyst heat management system comprises an exhaust tail pipe for exhausting waste gas generated by burning of the natural gas engine, a turbine and a three-way catalyst are arranged on the exhaust tail pipe, a burner for heating the waste gas in the exhaust tail pipe is arranged onthe exhaust tail pipe, and the burner is located on the upstream of the three-way catalyst. A gas taking port of the burner is connected with a gas inflow main pipe of the natural engine through a gastaking pipe, a gas storage tank, a first one-way valve located on the upstream of the gas storage tank, an electromagnetic valve and a second one-way valve are arranged on the gas taking pipe, and the electromagnetic valve and the second one-way valve are located on the downstream of the gas storage tank. According to the heat management system, through ignition burning of an igniter in the burner, the temperature of the waste gas on the upstream of the three-way catalyst is increased, and then the problem of low-temperature exhaust of the three-way catalyst is avoided; and through high-temperature and constant-temperature control over the exhaust temperature and increase of the flow of the waste gas, aging simulation of the three-way catalyst can be accelerated, and occupation of resources is reduced.

Description

technical field [0001] The invention relates to the technical field of thermal management, in particular to a thermal management system of a three-way catalytic converter. Background technique [0002] With the implementation of the National VI emission regulations, there are clear requirements for emission limits and the durability of emission control devices. How to control emissions and how to formulate effective emission control device durability tests has become an important issue for enterprises. For the national six-equivalent natural gas engine, the three-way catalytic converter is the only emission control device, and its catalytic efficiency directly determines the emission level of the engine. The durability assessment of the three-way catalytic converter is the most effective measure to ensure the durability of emissions. At present, in order to reduce the amount of precious metals used in three-way catalytic converters to cut costs, great adjustments have been m...

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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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