Automotive Air-conditioning Control System Design, Based On The Can / Lin Bus

Automobile air-condition has attracted more and more attention of automobile manufacturers with the rapid development of domestic automobile industry. Recently,the network connection of the automobile has developed fast.The CAN bus is the main network connection system.In this topic,we introduced the LIN bus into the automobile network system.The LIN bus is the complementarity of the CAN bus.It is mainly used in the low speed signal so that the cost can be reduced with the similar network performance.We also introduce the new sensor in the circuit to get more data about the environment in the car,such as air quality, temperature and humidity.Firstly,this dissertation refers to volumes of relevant documents and introduces the history of automobile air-condition network system.In addition,the dissertation talks about the development inside of the country and outside of the country.Secondly,this dissertation introduces the theory of the CAN bus and LIN bus. In this section,it mainly talk about some foundational concepts of CAN/LIN and its physical construction.Furthermore,this dissertation details on protocol and rules of the CAN/LIN.Thirdly,this dissertation disserts the real application of the automobile air-condition system based on CAN/LIN in this few years.This dissertation analyses the working principle of the automobile air-condition system,especially the system structure of the refrigeration and warm all in one type automobile air-condition.In addition,this dissertation ascertains the network of the automobile air-condition system.Fourthly,this dissertation researches the newer automobile air-condition controller system based on CAN/LIN bus and designs the DEMO model.In this dissertation,the air-quality sensor is introduced into the air-condition system.It is replaced the temperature sensor.In this case,the sensor not only gets the data of the temperature inside of the car,but also gets the air quality(such as the thickness of the CO,CO₂) and humidity.This dissertation respective researches the hardware circuit frame of the whole air-condition system and the circuit of the Intelligent Node,the software for the initialization of the CAN controller,the network construction of the newer air-condition.At the end of this chapter,a simple DEMO of the newer air-condition system is given.Lastly,this dissertation prospects the further development of the automobile air-condition control system in the future.Especially,it forecasts the network system in the automobile control system.