Finished automobile controller monitoring system and its implementing method

Abstract

The invention provides a monitoring system with a double-CPU structure for a whole vehicle controller and an implement method thereof, and designs a safety line monitoring circuit. A master CPU is in charge of whole vehicle control. A slave CPU is in charge of monitoring of the master CPU. When the master CPU appears abnormal, the slave CPU can replace the master CPU in time, and make the whole vehicle system in a safe mode through the safety line, therefore, the reliability of the system is increased. The present invention has a beneficial effect that a slave CPU is added to greatly reduce system security questions caused by that programs of a master CPU lose control because of system interference; the present invention has another beneficial effect that a system crash question caused by CAN bus failure can be avoided by adding the safety line monitoring circuit in the whole vehicle controller and connecting the safety line monitoring circuit with a peripheral controller directly through the safety line.

Description

technical field [0001] The invention relates to the field of automobile controllers, in particular to a vehicle controller monitoring system and an implementation method thereof, which are suitable for a vehicle controller of a fuel cell vehicle or a vehicle controller of a hybrid electric vehicle. Background technique [0002] In fuel cell or hybrid electric vehicles, the vehicle controller is the core control unit in the development of new energy vehicles. The reliability and safety of the vehicle controller system are directly related to the safety performance of the vehicle. However, the vehicle controller on domestic new energy vehicles generally uses a single CPU to control the vehicle system. If the CPU program runs out of control due to external interference or other factors, it will directly lead to system safety problems and reduce system reliability. [0003] In addition, the vehicle controller and other controllers (motor controller or battery controller) general...

AI Technical Summary

Problems solved by technology

The establishment of the traditional automobile "CAN" network is to connect all controllers through a bus. This method has a simple structure, but since all controller information transmission depends on a bus, the probability of "blocking" of communication data increases. And once a bus failure occurs, the controllers on the bus will not be able to work, resulting in "paralysis" of the vehicle control

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