Study On Energy Recovery Of Automobile Braking

With the development of automobile industry, three difficult problems which are safety, energy saving and environmental protection need to be solved. When a running automobile is put on the brake, its kinetic energy is changed into heat energy being consumed. The loss energy during vehicle braking can be regenerated and reused when the automobile starts or accelerats. Therefore, automobile fuel consumption and exhaust gases can be reduced. By the way,it can benefit the environment, and can prolong the life of vehicle's braking system.CPS(Constant Pressure Source) system is a hydraulic system working in constant pressure ,and can be used to replace traditional mechanical transmission. This system can replace energy transsion, energy transform and driving force control.The content of this thesis is as the follows: CPS model for a certain vehicle is set up; Main structure and parameters of spares and parts in the CPS is analysed. The methods for main function norm of the engine and main parameters determination of FFC(Fluid Force Couple) variable pump/motor are presented; The control tactics for recovery system of kinetic energy during vehicle braking is put forward; The control tactics for efficiency of recovery is analysed; By dynamic analysis and emulation research, steady state performance that is influenced by the various factors is discussed and evaluated; In order to forecast practical prospects and to provide related design basis for recovery system of kinetic energy during vehicle braking, the running circumstances of domestic city vehicles and the vehicles used in china-western mountain area are investigated; The performance of the model for a certain vehicle is analysed and calculated; In order to match all parametens of spare and parts rationally, parametens for all component of system are designed excellently; According to excellent result, utilization ratio of recovery system and effects of energy saving is discussed; effects of energy saving is demonstrated by means of Experiment.The rsearch results indicated that effects of energy saving for CPS system to vehicles running in city or in mountain area is very clear, and that it is very significant to reduce exhaust gases and to protect the environment against.