Network frame loss processing method of CAN (Controller Area Network) bus

A CAN bus and processing method technology, which is applied in the field of automobile manufacturing to achieve the effect of improving driving safety and ensuring normal driving.

Inactive Publication Date: 2011-04-13
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the bus has made corresponding regulations on its frame format sending and receiving mechanism, so that the frame sending and receiving mechanism on the bus is quite perfect (that is, the underlying processing mechanism of CAN is already perfect), but each frame signal is sent through each node. It is realized by the software, and it cannot guarantee the correctness of the software operation, so there will be frame signal loss.

Method used

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  • Network frame loss processing method of CAN (Controller Area Network) bus
  • Network frame loss processing method of CAN (Controller Area Network) bus

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Embodiment

[0014] 3. View the threshold T corresponding to the node that has not received the frame signal N Whether the value is exhausted, if it is not exhausted, execute 4, if it is exhausted, execute 5;

[0015] 4. Use the recently received frame signal data of the node for the input of the node and continue to execute the internal program of the node normally, and return one;

[0016] Five, the node that needs this frame signal will adopt invalid signal as the input of this node and close the program output of this node, execute six, in this embodiment, if the ESP node does not receive the steering wheel angle sensor signal for a long time, then the ESP node is closed ESP function output;

[0017] 6. Record the corresponding diagnostic fault code and return one.

[0018] The above embodiment is only one of the best solutions of the present invention, and does not limit the present invention in any form, and there are other variations and modifications on the premise of not exceedi...

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Abstract

The invention relates to a network frame loss processing method of a CAN (Controller Area Network) bus, in particular to a network frame loss processing method of the CAN bus aiming at the condition that a frame signal is lost when transmitted in a fixed cycle. The network frame loss processing method comprises a long loss processing method and a short loss processing method which can be decided by the state of a preset time threshold TN (Twisted Nematic). According to the invention, different processing methods can be selected according to different frame loss conditions, so that the CAN bus of an automobile engine has certain capabilities of fault tolerance and deviation rectification when transmitting and receiving the frame signal, the normal driving of the vehicle can be ensured and the safety for driving can be also improved.

Description

technical field [0001] The present invention relates to the field of automobile manufacturing, more specifically, the present invention relates to a CAN bus network frame loss processing method for bus failure processing of an in-vehicle controller (a node requiring CAN communication, such as an engine). Background technique [0002] The controller in the car (the node that needs CAN communication, such as the engine) CAN bus is the medium for transmitting signals of each node, and the sending and receiving of each signal are controlled by each node; the signals transmitted on the CAN bus are required by the corresponding nodes For the input signal, the signal is sent and received in frame format. [0003] Each signal (that is, the frame transmitted on the bus) is sent on the bus in a corresponding way, generally in the following three types: fixed-period transmission, that is, the node sends a certain frame signal at a fixed period; event-triggered transmission, that is, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L12/26H04L12/40
Inventor 朱祝阳蔡伟杰熊想涛陈文强由毅李书福杨健赵福全
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
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