Shift monitoring method and device based on main gearbox speed ratio, equipment, medium and product

By monitoring the gear ratio of the main gearbox to determine the position of the shift actuator and the gear selector actuator, the difficulty in judging the success of gearbox shift caused by sensor failure is solved, and accurate shift judgment is achieved in fault conditions.

CN118499459BActive Publication Date: 2026-07-10WEICHAI POWER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WEICHAI POWER CO LTD
Filing Date
2024-05-10
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

If the position sensors of the shift actuator and the gear selector malfunction during the shifting process of an automatic mechanical transmission, their positions cannot be directly obtained, making it impossible to determine whether the transmission has successfully shifted gears.

Method used

By acquiring the main gear ratio and continuously monitoring it when the sensor fails, it is determined whether the main gear ratio is within the preset range, and whether the positions of the shift actuator and the selector actuator have reached the preset positions, thereby determining whether the gearbox has successfully shifted gears.

Benefits of technology

In the event of sensor failure, it can accurately determine whether the transmission has completed a gear shift, ensuring the success and reliability of the gear shift operation.

✦ Generated by Eureka AI based on patent content.

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    Figure CN118499459B_ABST
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Abstract

This application provides a shift monitoring method, apparatus, device, medium, and product based on the main gearbox ratio. The method includes: during shifting in an automatic mechanical transmission, acquiring a first operating state of a first position sensor for monitoring the position of a shift actuator, and a second operating state of a second position sensor for monitoring the position of a gear selector actuator; if the first operating state and / or the second operating state is a first abnormal state, then continuously acquiring the main gearbox ratio of the automatic mechanical transmission after a first preset time period following the shifting action; if the main gearbox ratio remains within a target preset range for a second preset time period, determining that the positions of the shift actuator and the gear selector actuator have both reached their respective preset positions, and then generating a first command. This method solves the problem of how to determine the positions of the shift actuator and the gear selector actuator based on the main gearbox ratio, and thus determine whether the shift was successful, when the position sensor malfunctions.
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