Automotive Thermal Management System
The automotive thermal management system is a system that coordinates the relationship between heat, the engine and the vehicle, and uses comprehensive means to control and optimize heat transfer from the perspective of system integration. It can automatically adjust the cooling intensity according to the driving conditions and environmental conditions to ensure that the cooled object works in the optimal temperature range, thereby optimizing the environmental performance and energy saving effect of the vehicle, while improving the vehicle's operating safety and driving comfort.
The automotive thermal management system is mainly used for cooling and temperature control, such as cooling of the engine, engine oil, lubricating oil, charge air, fuel, electronic devices and exhaust gas recirculation (EGR), and temperature control of the engine compartment and cab, etc.
Through the above introduction, everyone knows that automotive thermal management technology is mainly used in automobiles. The following is a detailed introduction to which types of automobiles are specifically applied:
1. Fuel vehicles
The thermal management system of a fuel vehicle consists of an air intake intercooler circuit, an engine cooling circuit, an air conditioning system circuit, and a heater core circuit. The circuit is connected to the radiator at the front of the vehicle to release excess heat to maintain the normal operating temperature of the circuit. Traditional automobiles are driven by the engine. Affected by the properties of the engine, more than 30% of the heat in the automobile system needs to be released by the engine cooling circuit to prevent the engine from overheating under high load conditions. The engine cooling circuit includes cooling pipes, water tanks, water pumps, radiators and other structures, which use cooling water to complete heat transfer and circulation, and stabilize the engine operating temperature at around 90°C.
2. Electric vehicles
The electric vehicle replaces the engine with a motor, and its thermal management system consists of a motor circuit, a battery circuit, an air conditioning system circuit and a heater core circuit. The cooling circuit of an electric vehicle is similar to that of a gasoline vehicle, but its working purpose and working conditions are different. For example, the reasonable operating temperature of the motor circuit should not exceed 80°C, while the reasonable operating temperature of the battery circuit should be 20-35°C. Typically, the air conditioning system loop cools the car interior, but it also cools the battery loop. After the engine is replaced, the waste heat of the engine cannot be obtained for heating in cold weather, and the positive temperature coefficient thermistor (PTC) of the heater core circuit is used to convert electrical energy into heat energy.
