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A master-slave ECU power-off control method and system

A technology of power control and power-off, applied in the ECU field, can solve the problems that the master ECU cannot receive the message, the master-slave ECU message time-out fault, etc., and achieve the effect of avoiding the time-out fault

Active Publication Date: 2022-03-01
WEICHAI POWER CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, all power-off delay requests are mainly implemented in the master ECU. If there is no power-off delay request from the slave ECU, the slave ECU first performs a power-off operation, that is, the slave ECU enters a stop working state, so that the master ECU cannot receive For the message from the slave ECU, the master and slave ECUs cannot transmit control information through CAN communication, which causes the master ECU to report a master-slave ECU message timeout fault

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  • A master-slave ECU power-off control method and system
  • A master-slave ECU power-off control method and system
  • A master-slave ECU power-off control method and system

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Embodiment Construction

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0050] In this application, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none. other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "com...

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Abstract

The invention discloses a master-slave ECU power-off control method and system. The master ECU and the slave ECU in the power-off process state judge whether the engine has completed the power-off delay request operation. If so, the communication between the master ECU and the slave ECU is Under normal circumstances, the master ECU and the slave ECU respectively obtain the power-off delay request status message sent by the other party. The master ECU and the slave ECU determine whether the power-off delay request is completed based on the power-off delay request status message. If so, the master ECU and the Simultaneously power off the ECU. Through the above method, the master ECU and the slave ECU determine that the power-off delay request is completed based on the power-off delay request status message sent by the other party. The power-off operation avoids the occurrence of message timeout faults caused by the main ECU and the slave ECU not being powered off at the same time.

Description

technical field [0001] The invention relates to the technical field of ECUs, and more specifically, to a master-slave ECU power-off control method and system. Background technique [0002] In order to meet the hardware-driven requirements of large-bore engines and direct-injection engines in automobiles, the master-slave ECU (Engine Control Unit, ECU) engine control unit is used to power off, that is, the control strategy of dual ECUs entering the working state at the same time. [0003] In the prior art, all power-off delay requests are mainly implemented in the master ECU. If there is no power-off delay request from the slave ECU, the slave ECU first performs a power-off operation, that is, the slave ECU enters a stop working state, so that the master ECU cannot receive For the message from the slave ECU, the master and slave ECUs cannot transmit control information through CAN communication, which causes the master ECU to report a master-slave ECU message timeout fault. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/00F02D41/26H04L12/10H04L12/40
CPCF02D41/00F02D41/26H04L12/40H04L12/10H04L2012/40215H04L2012/40273
Inventor 孙晓鹏任宪丰卢朋珍杨帆
Owner WEICHAI POWER CO LTD