Thermal management system of hybrid power heavy truck and control method

Abstract

The invention discloses a thermal management system of a hybrid power heavy truck and a control method. According to the thermal management system, components with different thermal demands are integrated in different cooling subsystems respectively, and the thermal management system can be divided into a high-temperature-level cooling system, a low-temperature-level cooling system and an air conditioner cooling system, wherein the high-temperature-level cooling system comprises an engine water circulation cooling device and an engine oil circulation cooling device, the low-temperature-level cooling system comprises a power battery and a motor, and the air conditioner cooling system is provided with a double-drive air conditioner compressor. The provided thermal management system of the heavy truck provides a control method for vehicle warming, driving and post-cooling and can achieve distribution of heat dissipation amount of each component under various working conditions as required, reasonably utilize waste heat and reduce the energy consumption of accessories of the thermal management system, so that the cost-effectiveness of a whole vehicle is improved.

Description

technical field [0001] The invention belongs to the field of thermal management of hybrid electric vehicles, and in particular relates to a new intelligent control method for accessories of a thermal management system of a hybrid electric heavy-duty truck. Background technique [0002] The thermal management system of the vehicle is an important auxiliary system to ensure the normal and stable operation of all components of the vehicle. In order to keep the vehicle engine, motor, battery, etc. The heat is within the optimum range to ensure that the engine will not be unreliable due to overheating, such as the decrease of the air charge coefficient, abnormal combustion, knocking, early combustion, etc., due to deterioration and burning of the engine oil, and also to avoid heat dissipation caused by excessive cooling The consequences of excessive loss, increased effective work loss, and increased friction and wear of parts lead to increased mechanical loss. Compared with the ...

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Problems solved by technology

[0004] 1. The cooling circuit of high-voltage components does not take into account the unnecessary heat loss caused by the radiator passively facing the wind during the vehicle warm-up process in winter in the north. At the same time, the power battery does not have a pre-heating scheme for the pre-heater

[0005] 2. The supercharged intake air intercooler is still arranged in the high-temperature coolant circuit where the engine is located, which has limited cooling effect on the intake air; the consideration of engine heat load components is not detailed enough, and the use of EGR cooler is not considered;

[0006] 3. The air-conditioning compressor adopts an electric compressor, which does not have the characteristics of flexible, adjustable and high-efficiency dual-drive air-conditioning compressors;

[0007] 4. The cooling circuit of the engine cylinder block and the engine cylinder head adopts a series type, which cannot well meet the corresponding heat demand of the cylinder block and cylinder head;

[0008] 5. It is impossible to flexibly control the flow rate of the oil coolant, that is, it is impossible to effectively control the temperature of the oil, and it is difficult to reduce the mechanical efficiency and the power consumption of the oil pump;

[0010] 1. The heat load of the engine's supercharged air intake intercooler and EGR cooler is not considered. The power battery is air-cooled, there is no preheating scheme, and the important influence of the thermostat on the flow distribution in the cooling circuit is not highlighted.

[0011] 2. The thermal management scheme of the cooling circuit of the air conditioner is not considered; the system structure is complex, using multiple radiators and multiple sets of cooling fans

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