Method and system for judging abnormal power-off of ECU
A technology of abnormality and judging unit, which is applied in the field of judging abnormal power-off of ECU, which can solve the problems that data cannot be stored normally, it is difficult to know abnormal power-off, and it is impossible to effectively avoid abnormal power-off
Active Publication Date: 2020-04-17
WEICHAI POWER CO LTD
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Problems solved by technology
When the ECU is running, it needs to be powered off normally to store some important data, such as time and mileage. It is difficult to know the specific reasons for abnormal power off, and it is impossible to effectively avoid abnormal power off
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[0028] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0029] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.
[0030] As described in the background technology, when the ECU is running, it needs to be powered off normally to store some important data, such as time, mileage, etc. T15) After power off, when the ECU has not been powered off, the total power of the ECU is directly cut off, resulting in the failure of normal...
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The invention provides a method and a system for judging abnormal power-off of an ECU. After an ECU is powered on, the power-on frequency, the power-off frequency and the complete power-off frequencyare recorded; whether the power-off frequency is the same as the complete power-off frequency or not is judged; when the power-off frequency is the same as the complete power-off frequency, whether the power-off frequency after the power-on operation is increased or not compared with the power-off frequency before the power-on operation is judged; if the power-off frequency is increased, it is indicated that there is no abnormal power-off; if the power-off frequency is not increased, it is indicated that abnormal power-off occurs in the power-on process, and the abnormal power-off is power-offof main power of the ECU in the power-on process; when the power-off frequency is different from the complete power-off frequency, whether there is a situation of multiple times of power-on or multiple times of power-off is detected; if there is multiple times of power-on or multiple times of power-off, it is indicated that there is no abnormal power-off situation; and if there is no multiple times of power-on or multiple times of power-off, it is indicated that there is abnormal power-off situation, then the state of an engine is detected, and a specific abnormal power-off fault situation isobtained according to the state of the engine.
Description
technical field [0001] The invention relates to the technical field of automobiles, in particular to a method and system for judging that an ECU is powered off abnormally. Background technique [0002] As one of the core components of electronically controlled engines, ECU (Electronic control unit) stores different control program codes and various types of data, and is increasingly prominent in the use of various electronic control technologies for engines. When the ECU is running, it needs to be powered off normally to store some important data, such as time and mileage. It is difficult to know the specific reason for abnormal power off, and it is impossible to effectively avoid abnormal power off. Contents of the invention [0003] In view of this, the object of the present invention is to provide a method and system for judging abnormal power-off of an ECU, which can know the specific fault and its cause, and effectively avoid the situation of abnormal power-off. [...
Claims
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Login to View More IPC IPC(8): G05B23/02
CPCG05B23/0221
Inventor 秦涛孙明峰许帅辛英
Owner WEICHAI POWER CO LTD