With the development of the automobile industry, automobiles have gradually become a must-have means of transportation for thousands of households, and their comfort has also attracted more and more attention to most car buyers. Among them, automobile air conditioners, as one of the important subsystems, are responsible for regulating the temperature and humidity in the passenger cabin, air quality management, windshield defrosting and defogging and other functions. Most automotive air conditioning systems use the engine as the power source. The engine directly drives the air conditioning compressor, and the generator generates electricity to drive the blower, cooling fan, actuator, etc., and uses engine cooling water as the heating source. It can be seen that the air conditioning system and the engine have a close connection. With the rapid development of information technology, electronics industry and chip industry, the demand for automatic air conditioners in automobiles has also increased rapidly. Automatic car air conditioning can greatly simplify passengers 'operation of the air conditioning system. It can be completed with one click of a user. The addition of smart sensors provides a foundation for the development of a more efficient and energy-saving air conditioning control system. On this basis, compressor control can be optimized based on engine status., combined with engine water temperature to optimize condenser control. The multi-temperature zone air conditioning system can adjust the comfort level individually for different seating areas to increase comfort. Through the development of this project, the following main scientific and technological innovations have been achieved: 1. The multi-temperature zone automatic air conditioning control algorithm supports independent air conditioning control in the four temperature zones of the passenger cabin. Physically, independent temperature, air volume, etc. are controlled at each air outlet in the passenger cabin; algorithmically, the comfort setpoint of the temperature zone is set by integrating passenger operations and environmental factors. During control, the comfort level of the temperature zone is evaluated by integrating air volume, temperature, sunshine, etc., so that each temperature zone can be controlled to achieve the comfort setting of the customer's experience. 2. When designing the core control algorithm, the energy algorithm is used as the basic control, and then the PID control is used for fine-tuning. The energy algorithm learns the state of the vehicle by collecting ambient temperature, vehicle speed, sunshine, etc., and obtains the air conditioning load through the energy algorithm, so that it can be controlled in advance when the load changes. 3. The energy algorithm is used as the basis for designing the algorithm of the externally controlled variable displacement compressor, and PID control is added to adjust the steady-state error. The energy algorithm uses the inlet and outlet air temperature of the evaporator to calculate the refrigeration system load, thereby obtaining the required compressor control displacement, and then adjusts the error between the actual evaporator air temperature and the set temperature through PID. At the same time, through the cooperation of compressor control and temperature damper, the evaporator set temperature can be changed to achieve the purpose of energy conservation. 4. The project adopts AUTOSAR software development architecture to conduct modular management and development of software and hardware, and organizes software development in accordance with the CMMI software and hardware development process. The development of multi-temperature zone automatic air conditioning control algorithm has obtained 1 authorized invention patent, 3 authorized new type patents, 1 software copyright, and 2 published papers. A control algorithm and software and hardware development process was established, algorithm and software and hardware technical documents were written, and intelligent air conditioning control system development was realized from algorithm, software, hardware, system integration verification, vehicle verification, environmental simulation wind tunnel calibration test, and all-weather road calibration test. It has replaced General Motors products, mastered the core technology of automatic air conditioning control, reached the domestic leading level, and was successfully applied to GL8, the new Yinglang and other models, saving more than 10 million yuan in technology transfer fees, project development fees and parts costs. Using local suppliers to replace the original GM suppliers has improved the industrial chain capabilities of China's automobile industry. The research and development of this product reflects the theme of the times of scientific and technological innovation, reflects the future development direction of green energy, and helps China become an innovative country. Through scientific and technological novelty search, it can be seen that there are no domestic documents and patents corresponding to the design and key technologies adopted by the project, and the development of the project is novel.