Adsorption and desorption system and control method for automobile cold start emission

Abstract

The invention provides an adsorption and desorption system and a control method for cold start of an automobile engine. The system includes a first air filter device (1), an engine intake pipe (2) and an engine (3), and the first air filter device (1) is connected to the engine (3) through the engine intake pipe (2); The device (4) is connected in series with the secondary three-way catalytic converter (6) and connected with the engine through the front exhaust pipe (5); the front Y-shaped pipe (7) is connected in series with the front exhaust pipe (5), and the main exhaust The pipeline (10) and the adsorption pipeline (11) are connected in parallel through the front Y-shaped pipeline (7). Control each valve so that the exhaust gas in the cold start phase of the automobile engine passes through the adsorption device (19) and then is discharged through the rear exhaust pipe (14), and after the cold start phase ends, the adsorption device (19) is in a bypass state, and After the engine speed is increased, the pollutants adsorbed on the adsorption device (19) are blown into the engine (3) by using the negative pressure generated by the vacuum of the engine intake pipe (2) and the air entering from the desorption intake line (16). Combustion, so as to achieve the purpose of energy saving and emission reduction.

Description

technical field [0001] The invention provides an adsorption and desorption system and a control method for automobile cold start emission, which belong to the field of internal combustion engines. Background technique [0002] With the rapid increase in the number of automobiles, automobile emissions have aggravated air pollution and environmental degradation. Automobile emissions have become the main source of urban air pollution. Reducing pollutant gas emissions during engine cold start has become one of the important issues to be solved for the continued development of internal combustion engines. The latest national standards, the country will implement the fifth phase of national motor vehicle emission standards on January 1, 2018, and Beijing will implement the fifth phase of national motor vehicle emission standards ahead of schedule on January 1, 2016. The National V standard is equivalent to the Euro V standard of the European Union. The European Union has implement...

AI Technical Summary

Problems solved by technology

But so far, there are very few products that really apply adsorption technology to the control of automobile cold start emissions, mainly due to the poor temperature resistance of the adsorption material, the complexity of the desorption control strategy, and the impact of the adsorption and desorption system on the economy of the vehicle. etc

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