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Abstract: With the rapid development of automobile industry and the increasing standard of living, cars began to households. People in the consistent pursuit of the motor vehicle safety, reliability at the same time, and now also more emphasis on comfort requirements. Thus, the air conditioning system as the basic equipment of modern cars, it has become inevitable.
In recent years, environmental and energy issues become the focus of world attention, affecting the automobile industry has become a key factor in the development of various alternative energy powered vehicles appear, for the automotive air conditioning industry, has raised new issues and challenges.
20 years of this century since the birth of automotive air conditioning, car air conditioning system along with the popularization and development, the development of automotive air conditioning has gone through five general phases: a single heating stage, single stage air-conditioning, heating and integration phase, automatic control, the computer control stage. Air conditioning control method also experienced from simple to complex, then complex to the simple process. The circuit of a vehicle air conditioning systems also do not control section updated to improve at the same time, the installation of automotive air conditioning with the development of automobile industry in order to achieve 100% universal, air conditioning has become the basic equipment of modern cars has always been. To the use and maintenance of automotive air conditioning brings new challenges. Finally the method of automotive air conditioning troubleshooting, air conditioning system on the car we will discuss, in order to achieve understanding of the automotive air conditioning systems, and use in practical work.
Key words: automobile air conditioning compressor repair

Presently,automobile security system can be divided into "automobile active security system" and "automobile passive security system" these two categories.This essay is to analyze these two categories...

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