A method and system for torque compensation of an externally controlled variable displacement compressor

Abstract

The invention discloses an external control variable displacement compressor torque compensating method and system. The method includes enabling an electronic injection EMS to collect an engine revolution signal to determine the current engine revolution value, connecting an air conditioner electronic control unit (ECU) through controller area network (CAN) communication to determine current control current of an external control variable displacement compressor and refrigerant pressure value, utilizing an internal MAP to obtain current torque value through a table look up method, and achieving real-time compensation of the whole automobile torque by adjusting parameters like oil injection quantity according to torque value required to be compensated. By means of a whole automobile and bench test method, the refrigerant pressure, control current of the external control variable displacement compressor, the engine revolution and the compressor torque are correlated, real-time compensation is conducted on the external control variable displacement compressor torque of a whole automobile, the external control variable displacement compressor torque compensation accuracy can be improved, and power output of the whole automobile and driving and taking comfort can be ensured.

Description

technical field [0001] The invention relates to the technical field of automobile parts, and more specifically, relates to a method and system for torque compensation of an externally controlled variable displacement compressor. Background technique [0002] With the continuous development of society, cars, as a necessity of life, are slowly entering every family, and users have higher and higher requirements for cars, especially for performance and driving comfort. An important part of a car, its operating state directly affects the power output of the vehicle. [0003] As the key to the air conditioner, the compressor is the power source of the air conditioning system. In order to reduce the fluctuation of the output torque of the vehicle when the compressor is running, the EFI field of the vehicle needs to compensate the torque of the compressor. Therefore, in order to ensure the power of the vehicle Output, the measurement and processing of compressor torque is imperati...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a method and system for torque compensation of an externally controlled variable-displacement compressor to overcome the inconstant consumption of torque due to the variable displacement of the externally controlled variable-displacement compressor in the prior art This makes the torque compensation of the externally controlled variable displacement compressor more difficult to achieve high precision and cannot guarantee the comfort of drivers and passengers

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