A kind of internal combustion engine cold start gas circulation system and automobile

Abstract

The invention provides a cold start air circulation system of an internal combustion engine and an automobile. The cold start air circulation system of the internal combustion engine comprises a mainair inlet, a main air inlet pressure stabilization chamber connected with the main air inlet, a sub air inlet and a sub air inlet pressure stabilization chamber connected with the sub air inlet, wherein the main air inlet pressure stabilization chamber is connected with an air inlet pipeline of a combustion chamber through a first connecting pipeline; an exhaust pipeline of the combustion chamberis connected with a main catalyst through a second connecting pipeline; a main exhaust port is formed in the main catalyst; a sub catalyst is arranged in the sub air inlet pressure stabilization chamber; and the sub air inlet pressure stabilization chamber is connected with the air inlet pipeline of the combustion chamber through a third connecting pipeline. According to the cold start air circulation system of the internal combustion engine and the automobile provided by the invention, the intake air temperature during the cold start stage is increased, so that the fuel atomization effect isimproved, and atmospheric pollution caused by emissions is reduced.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to an internal combustion engine cold start gas circulation system and the automobile. Background technique [0002] With the gradual strictness of national regulations on automobile engine emissions, it is necessary to adopt corresponding technical means to significantly reduce the level of exhaust emissions. Gasoline internal combustion engines have poor atomization effect of fuel droplets due to low cylinder and combustion chamber temperatures during cold start, resulting in incomplete combustion of more fuel at this stage, resulting in high levels of hydrocarbons, carbon monoxide and particulate matter emissions. In the cold start stage, the catalyst temperature is low, and the exhaust gas cannot be effectively catalyzed before the catalyst reaches the light-off temperature. The catalytic light-off temperature of the catalyst is generally around 350°C, so how to improve the efficiency...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a cold start gas circulation system of an internal combustion engine and an automobile, the purpose of which is to solve the problem of air pollution caused by tail gas generated in the cold start stage

Images