Research On Electronic Cooling System Of Formula Race Car

For the Formula SAE combustion race car,many teams are troubled by cooling problems such as engine overheating during endurance race,heat soak during shutdown,and too long warm-up time.The cooling system is very important to the reliability and economy of the engine.Therefore,it is necessary to study the cooling system of the car.This paper toke the 2017 Taiyuan university of Technology formula race car as the research object to optimize the cooling system.In this paper,engine performance parameters and race car's endurance racing operation parameters were obtained through engine bench test and racing track data acquisition test.After data analysis and processing,the endurance speed drive cycle model was established.And the one-dimensional race car drive system model and engine cooling system model were established by using GT-SUITE software to study the performance of the cooling system in the transient condition of endurance speed drive cycle,and the electronic cooling system of the formula racing car was studied based on the model.After systematically analyzing the race car's cooling system,this paper carried out relevant optimization studies from the aspects of the ultimate heat dissipation capacity of racing tracks,the normal temperature working stage of the engine,and the engine warm-up working stage.For the research of the race car's ultimate heat dissipation capacity,this paper studied the transient heat dissipation of the radiator that affects the race car's ultimate heat dissipation through simulation test.The optimized results showed that the radiator area of the car was reduced by 30% under the condition of meeting the ultimate heat dissipation demand,and the heat dissipation performance data of the optimized radiator was obtained.In the normal temperature working stage of the engine,the main factor affecting the performance of the cooling system is the control of coolant flow.On the premise of guarantee the accuracy and response,this paper adopted the intelligent MAP control mode to control electronic pumps,and according to heat balance principle,through the analysis and calculation,established the intelligent electronic pump control MAP with multiple signals input,such as speed,the engine speed,throttle position,engine temperature,environment temperature and so on.The simulation results showed that the engine temperature in the endurance race can ensure near the expected temperature,and effectively reduced the pump rotation speed.At the same time,the problem of engine heat soak was solved.In the engine warm-up stage,the cooling capacity of the cooling system is mainly related to the thermostat control.This paper designed an electronic rotary three-way valve structure for race car's engine,and predicted the application effect of the PID control of the rotary three-way valve through simulation test.The simulation test result showed that the engine warm-up speed of the application of electronic thermostat was significantly accelerated,and the temperature fluctuation of the engine was significantly reduced in the endurance race.Due to the variability of FSAE car's power unit,targeted engine power unit matching design of the intelligent electronic MAP type cooling control system need to be redesigned.In order to reduce the electronic cooling system research and development costs,from improving the car electronic cooling system's generality and good matching adaptability perspective,this paper studies the fuzzy control of the electronic cooling system of race car,and designed a Mamdani fuzzy controller with two inputs and two outputs.The feasibility of the universal design of fuzzy control was verified by simulation test and intelligent MAP control.