A method for calibrating vehicle instrument configuration parameters

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 ...

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

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