Power Performance Analyze And Optimize For DA468QL1 Gasoline Engine

The institute of Chinese develop and innovate defined the scope of the economy cars in 2005, which displacement is equal or less than 1.4 liter, and length dimension of vehicle is equal or less than 4 meter, and engine volume power is equal or less than 45kW per liter. They said they will issue a series of policy of auto tax of buying cars which courage the custom to buy the economy cars. The car which DA468QL1 engine equipped with belongs to mini car. The dimensions of mini car are meet the requirement about vehicle mentioned above, but the volume power of DA468QL1 engine is less than 45kW per liter.By collecting a lot of data used in this article about the engine performance and parts structure parameter which is at home and abroad, and using the AVL BOOST to simulation calculate and analyze of engine performance, then got the main direction of optimize is increase engine compress ratio and decrease the inlet pressure drop and increase the diameter of intake and exhaust air passage and increase the engine speed and so on, at last the result be proved by performance test and durability test in test bench, the volume power of DA468QL1 engine improve more than 45kW per liter, that is to say the DA468QL1 engine meet the basic requirement issue by the institute of Chinese develop and innovate.The information about the engine performance and parts structure parameter counted in the article is well worth using in the new engine design and used engine. By succeeding optimizing the DA468QL1 engine, the result may provide a better thought, at the same time can provide to use for reference about DongAn series engine performance meeting the economy car's requirement.