Research on the Real-time Performance of CAN Bus Based on 4WID New Energy Bus Network

Abstract

In the process of urbanization development, air pollution caused by traditional fuel vehicles is getting more and more serious, which directly affects the level of urban construction and development. With the continuous improvement of my country's automotive electronic technology, in the current development of the automotive industry, people have relatively high requirements for the safety and comfort of vehicles. In the car design process, giving lull play to the positive role of electronic control devices and communication equipment can improve the safety of the car to a certain extent. In the application process of electronic control devices and communication equipment, the messages transmitted by the entire vehicle bus will continue to increase, and information exchange will become more and more frequent, which will cause the load rate of the vehicle bus network to continue to increase. The traditional message arbitration scheme can no longer meet the real-time requirements of current automobile communication. In the process of real-time research on the vehicle power bus, effective measures need to be taken to improve the real-time performance of the CAN bus. The main purpose is to increase the transmission rate of the bus. At the same time, the traditional CAN bus network should be optimized to ensure that it can increase the information transmission speed under the condition of the high load rate of the car. At this stage, the highest transmission rate of the CAN bus is 1Mbps, and the bus can reach a higher transmission speed in FlexRay, but it cannot be widely used in a short time because of the economic cost. When researching the real-time nature of the CAN bus, it is necessary to use the 4WID new energy bus network as a carrier to conduct an in-depth analysis of the CAN bus technology and the vehicle network. At the same time, it discusses related technologies to improve the real-time performance of CAN bus. And use the non-important period message trigger transmission scheme to improve the data transmission efficiency of the CAN bus and ensure its real-time performance.