CAN (Controller Area Network) bus topology structure and method for starting vehicle by using same

Abstract

The invention discloses a CAN (Controller Area Network) bus topology structure comprising a high-speed network and a low-speed network and also comprising a starting network, wherein the starting network respectively carries out CAN communication with the low-speed network and the high-speed network through a gateway; the starting network comprises a vehicle body control module, an intelligent key system controller and a steering wheel lock controller which are respectively connected to a CAN bus of the starting network; and the vehicle body control module is also connected with the CAN bus of the high-speed network. The invention also provides a method for starting a vehicle by using the topology structure. In the CAN bus topology structure and the method for starting the vehicle by using the topology structure, the vehicle body control module, the intelligent key system controller and the steering wheel lock controller relevant to entire vehicle burglary preventing, entire vehicle electrifying and entire vehicle starting are connected to the CAN bus of the starting network, therefore, the failure ratio of the entire vehicle burglary preventing, the entire vehicle electrifying and the entire vehicle starting is effectively reduced; and meanwhile, the vehicle body control module is also connected with the CAN bus of the high-speed network, thus, the failure ratio of the entire vehicle burglary preventing, the entire vehicle electrifying and the entire vehicle starting is further reduced.

Description

technical field [0001] The invention relates to a CAN bus topology and a vehicle starting method using the topology. Background technique [0002] With the rapid development of science and technology, there are more and more electronic devices on the car, and the connection is getting closer, from engine control to transmission control, from driving, braking, steering control to safety assurance system and instrument alarm system . Now many cars use CAN (Controller Area Network) bus to connect them, but each control unit has different requirements for system response time, and some units have high requirements for real-time performance. , Just may cause serious consequence even car crash, as ABS / ASR / ESP unit, safety air bag etc. Some units, such as lighting control and air conditioning control, have relatively low requirements on response time. [0003] Therefore, in order to solve the above problems, such as figure 1 The topological structure of the CAN bus is shown. Th...

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Problems solved by technology

[0005] In order to solve the technical problem of high failure probability of vehicle anti-theft, vehicle power-on and vehicle start-up when the existing CAN bus topology is adopted, the present invention provides a vehicle anti-theft, vehicle power-on and vehicle start-up CAN bus topology for failure probability and vehicle starting method using the topology

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