The paper reviews the development status and trend of low emission cars and low emission mixed driving cars and new trend of the world car emission standards.

This paper expounds on the outlines of the automobile emission control theory in contrast with the other countries.

Catalytic converters have been widely used in automobile emission control.

It has been proved that using electric-control fuel-injection gasoline engine and three-way catalyst was the main method to control automobile emission.

Traffic environment assessment based on automotive emission estimation;

This paper briefly introduces the present situation of the automobile exhaust control in China, analyzes on the main components of the exhaust pollutants and their generating mechanism and their harmfulness for the human health, and puts forward some methods for controlling the pollution of the petrol engine exhaust from two aspects of the purification inside the engine and outside the engine.

The theory, means, classification and application of the simple performance test method used for testing automobile exhaust was expounded, and an applicable way to Beijing's automobile exhaust test was provided.