Optimal Design Of Three-cylinder Engine Mounting System In One Mini Car

In response to the four phase of the national fuel consumption regulations, more and more automobile manufacturers show their interests in small-displacement engine, and the three-cylinder engine with small displacement is one of the most choice in manufacturing Mini car industry. Compared to four-cylinder engine, three-cylinder engine has the advantages of simplicity, portability and convenient maintenance, therefore, become more and more popular in Mini car manufactures. Among the various components of the car, the engine is the most noisy part, the vibration will be passed to the body when it works through the engine mounting system. The stiffness of engine mounting system is lower, the impact of vibration to body is less, if the stiffness of mounting system is low excessively, the powertrain will be so unlimited that shifts on various operating conditions, accordingly, the stiffness of mounting system must be enough to limit movement of the powertrain. The vibration of three-cylinder engine is more serious than four-cylinder engine, so it is more important to design a better mounting system.Three cylinder engine is particularly important for the FAW Mini car, the vehicle with three-cylinder engine improve the dynamic property slightly and fuel economy substantially,Compared with the four cylinder reduction of fuel consumption reached more than 10%, had met the standard of national energy subsidies, each consumer would receive 3000 yuan from state subsidies, that is a huge amount of profit for large-sale and low-budget Mini car. To improve the vibration and noise level, extend the service life of powertrain, meet the needs of consumers, make three-cylinder engine accepted by the market, the optimal design of the mounting system is an important part.This dissertation deals with the optimal design of mounting system and the parametric analysis of mounting system. Including objective function modeling, mounting system stiffness optimum designing by Energy decoupling method, which improve the vehicle vibration.