A system and method for controlling the torque of a hybrid-driven automobile air-conditioning compressor

Abstract

The invention discloses a control system and method for torque for hybrid driving of an automobile air conditioner compressor. A controller is formed by sequentially connecting a compressor rotation speed calculation module, a compressor dynamic load torque T <pressure> predicting neural network, a load T2 calculating module and a brushless DC motor controller in series, wherein the load T2 calculating module of a brushless DC motor is arranged at the compressor end; ten different BP weak predictors are established, the compressor dynamic load torque T <pressure> predicting neural network is obtained, the parameters including the air conditioner compressor rotation speed, the air conditioner system pressure and the air conditioner compressor aperture serve as the input amounts of a predicting BP neural network, the dynamic torque load of the air conditioner compressor serves as output, the influences that a traditional BP nerve network is prone to getting into the local minimum are effectively reduced, the air conditioner compressor torque predicting precision is improved, and a good hybrid driving effect is achieved; and stability of load bearing through an engine at the air conditioner compressor end is guaranteed, the engine output torque stability is improved, and the automobile running stability is guaranteed.

Description

Technical field [0001] The invention relates to a hybrid vehicle air-conditioning compressor drive system structure and a control method for controlling the torque of the vehicle air-conditioning compressor based on the structure. Background technique [0002] The automobile air-conditioning compressor is the core of the automobile air-conditioning system. The traditional automobile air-conditioning compressor is connected to the engine through a pulley, and the engine provides power for the air-conditioning compressor. With the development of hybrid electric vehicles, due to the differences in power source and structure between hybrid electric vehicles and traditional vehicles, compared with traditional vehicles, there are more types of air-conditioning compressors available for hybrid vehicles, and there are also multiple driving sources. A feasible solution, instead of simply being driven directly by the engine. The existing hybrid vehicle air-conditioning compressor drive sc...

AI Technical Summary

Problems solved by technology

[0003] 1. When the engine is working and the engine drives the air-conditioning compressor, due to the adjustment of the state of the automobile air-conditioning system, the torque load of the engine driving the air-conditioning compressor will change with the adjustment of the state of the air-conditioning system, thus The output speed and torque of the engine at the output end of the driving force are unstable, causing the body to vibrate, which in turn affects the driver's comfort and driving safety

[0004] 2. Under the existing control scheme, as long as the engine is working, the air conditioner compressor will be driven by the engine. When the car is running, the engine must drive both the motor and the air conditioner compressor, resulting in excessive load on the engine during driving, which affects the The output power of the engine at the power end

It often happens that the engine still needs to bear the load of the motor when the battery pack is fully charged, but the electric energy generated by the motor cannot be used reasonably

[0005] 3. In the existing air-conditioning compressor driving schemes, the air-conditioning compressor is mainly driven by the engine or the motor, and some schemes consider hybrid driving, but there is no control scheme that specifically proposes that the air-conditioning compressor can be realized in the hybrid driving mode Control scheme for good hybrid driving effect of engine and electric motor

Images