A method for calibrating vehicle instrument configuration parameters

A technology for parameter calibration and instrument configuration, which is applied in motor vehicles, vehicle components, digital transmission systems, etc., can solve the problems of easy assembly errors, increased management costs, and cumbersome after-sales maintenance, and achieves the effect of reducing the number and improving the generalization rate.

Active Publication Date: 2021-08-13
DONGFENG AUTOMOBILE COMPANY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it is generally necessary to increase the part number to adapt to the changing needs of the whole vehicle, which results in more and more part numbers, especially for commercial vehicles, the number of instruments of the same model may be dozens or even hundreds, resulting in error-prone assembly. Increased management costs and cumbersome after-sales maintenance

Method used

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  • A method for calibrating vehicle instrument configuration parameters
  • A method for calibrating vehicle instrument configuration parameters

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

[0022] Such as figure 1 The vehicle meter configuration parameter calibration method shown is characterized in that it includes the following steps:

[0023] Step 1: Power on the ignition switch of the whole vehicle, the calibration device sends a request to the vehicle instrument to enter the extended mode, and the vehicle instrument replies to enter the extended mode;

[0024] Step 2: The calibration device sends a random number request to the vehicle instrument, and the vehicle instrument returns the random number information to the calibration device after receiving the request;

[0025] Step 3: The calibration device assembles the random number information into plaintext (plaintext = random number + fixed value, such as: the random number is 0xFAFB1245, the fixed value is 0xACBF1146, then the plaintext = 0xFAFB1245 ACBF1146) and performs encryptio...

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Abstract

The invention discloses a method for calibrating configuration parameters of a vehicle instrument, which comprises the following steps: 1: the calibration device sends a request to the vehicle instrument to reply to enter the extended mode; 2: the calibration device sends a seed request to the vehicle instrument, and the vehicle Use the instrument to reply the corresponding seed information to the calibration device according to the seed request; 3: The calibration device assembles the seed information into plaintext and encrypts and calculates it to form ciphertext, and replies to the vehicle instrument; 4: The vehicle instrument decrypts the ciphertext into plaintext, And compare and verify the plaintext with the seed information; 5: If the verification is successful, the calibration device will write the calibration parameters to the vehicle instrument; 6: The calibration device will read the calibration parameters from the vehicle instrument; 7: The vehicle instrument will calibrate The device returns the calibration parameters; 8: the calibration device compares the calibration parameters; 9: if the comparison is successful, the calibration device continues to write the next calibration parameter to the vehicle instrument. The invention can form the instruments required by various instantiated vehicle models.

Description

technical field [0001] The invention belongs to the technical field of automobile electronics, and in particular relates to a method for calibrating configuration parameters of a vehicle instrument. [0002] technical background [0003] With the change of vehicle configuration and functional requirements, there are more and more instrument part numbers on the car. There are two types of instrument changes. One is hardware changes, which involve internal PCB circuit boards and components. Changes must be given different part numbers to distinguish them; the other is software changes, which mainly involve changes in vehicle configuration parameters and functions, such as: rolling radius, drive axle speed ratio, engine type, vehicle configuration changes, Communication protocol changes, etc. In this case, only the software of the instrument has changed, and the hardware has not changed. At present, it is generally necessary to increase the part number to adapt to the changing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D65/14B60K35/00H04L9/08
CPCB60K35/00B62D65/14H04L9/0869H04L2209/84
Inventor 董庆大孔灵吴明瞭黎新付智俊李红涛
Owner DONGFENG AUTOMOBILE COMPANY
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