Method for operating a gearbox and gearbox control device

By determining output-side speed and sustainability size, the method addresses the challenge of detecting inadmissible speed gradients in vehicles without sensors, ensuring safe gearbox operation by transferring to a defined state only when significant and sustainable changes are detected.

DE102012211021B4Active Publication Date: 2025-01-30ZF FRIEDRICHSHAFEN AG
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Patent Information

Application Number
DE102012211021
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2012-06-27
Publication Date
2025-01-30
Estimated Expiration
2032-06-27

AI Technical Summary

Technical Problem

Existing vehicles, particularly mobile work machines lacking wheel speed sensors and electronic control systems, face challenges in reliably detecting inadmissible negative output speed gradients, leading to potential personal injury due to high noise shares in speed signal differentiation and difficulty in setting appropriate threshold values.

Method used

A method to determine output-side speed and its sustainability size, using formulas to assess gradient and sustainability, ensuring the gearbox is transferred to a defined state only when significant and sustainable changes occur, thereby avoiding personal injury.

Benefits of technology

This approach allows safe and reliable differentiation between operating states requiring gearbox intervention and those that do not, enhancing safety by accurately identifying hazardous speed gradients and preventing injuries.

✦ Generated by Eureka AI based on patent content.

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Abstract

Method for operating a vehicle transmission, wherein an output-side rotational speed (6) is determined, wherein a severity parameter (8) which is determined depending on the current output-side rotational speed (6) is determined, and wherein, depending on the severity parameter (8), at least one control signal for the transmission is determined in order to bring the transmission into a defined state, characterized in that the control signal or signals for the transmission are further determined depending on a sustainability parameter (10) which is determined depending on past output-side rotational speeds (8).
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Citation Information

Patent Citations

  • Control for a two-degree-of-freedom electromechanical transmission and associated method therefor

    DE10110965A1

  • drive system for vehicles with at least two driveable vehicle axles

    DE102007021732A1

  • Hydromechanical transmission

    DE102010053012A1

  • Control device for an automatic transmission

    DE112008002063T5

  • Method for braking and braking system of an externally braked device

    EP2384941A1