Method and device for controlling a transmission of a working machine

Patent metadata

Field	Value
Publication number	US-11015706-B2
Application number	US-202016869781-A
Country	US
Kind code	B2
Filing date	May 8, 2020
Priority date	May 9, 2019
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

A method for controlling the transmission of a working machine, by which, with at least one sensor of the working machine, at least one specific parameter is determined and transmitted to a control unit for controlling the transmission. The working machine has a lifting mechanism and the at least one specific parameter which characterizes an actuation condition of the lifting mechanism. A predetermined shifting strategy is adapted, by the method, as a function of the at least one specific parameter.

First claim

The invention claimed is:

1. A method of controlling a transmission of a working machine having a lifting mechanism, the method comprising:
determining and transmitting, with at least one sensor of the working machine, at least one specific parameter to a control unit for controlling the transmission, and the at least one specific parameter characterizes an actuation condition of the lifting mechanism, and the actuation condition being a relative position of the lifting mechanism and a load condition of the lifting mechanism, and
adapting a predetermined shifting strategy as a function of the at least one specific parameter.

2. A method of controlling a transmission of a working machine having a lifting mechanism, the method comprising:
determining and transmitting, with at least one sensor of the working machine, at least one specific parameter to a control unit for controlling the transmission, and the at least one specific parameter characterizes an actuation condition of the lifting mechanism,
adapting a predetermined shifting strategy as a function of the at least one specific parameter, and
adapting the predetermined shifting strategy when, from the characteristic of the specific parameter for carrying out an un-adapted transmission ratio change, a critical condition of the working machine appears to be likely.

3. The method according to claim 1 , further comprising adapting a shifting dynamic of a transmission ratio change to carry out a less pronounced transmission ratio change in comparison to the un-adapted transmission ratio change.

4. The method according to claim 1 , further comprising suppressing a transmission ratio change.

5. The method according to claim 2 , wherein the transmission ratio change is a downshift or an upshift.

6. The method according to claim 1 , further comprising inferring a current operating condition of the working machine based on the at least one specific parameter.

7. The method according to claim 1 , further comprising inferring a future operating condition of the working machine based on the at least one specific parameter.

8. The method according to claim 1 , further comprising activating a clutch-cut-off function.

9. A device for controlling a transmission of a working machine, comprising:
at least a control unit,
a lifting mechanism,
at least one sensor,
the control unit and the sensor being connected with one another for the transmission of signals,
the control unit being designed for carrying out a method of controlling the transmission of the working machine in which the at least one sensor of the working machine determines and transmits at least one specific parameter to the control unit for controlling the transmission, and the at least one specific parameter characterizes an actuation condition of the lifting mechanism, the actuation condition being a relative position of the lifting mechanism and a load condition of the lifting mechanism, a predetermined shifting strategy is adapted as a function of the at least one specific parameter, and the control unit is designed to emit a signal for adapting the shifting strategy.

10. A drive-train of a working machine comprising a drive element, and the transmission and the device according to claim 9 for controlling the transmission.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Bieber Sven
• Schwarz Andreas
• Kurz Thomas

Classifications

• B60W20/30

  Control strategies involving selection of transmission gear ratio {(control of change speed gearings, together with other vehicle sub-units B60W10/10; HEV transmission gearing B60K6/36; gearings and control thereof F16H)} · CPC title

• F16H61/0213 Primary

  characterised by the method for generating shift signals · CPC title

• B60Y2200/49

  Movable platforms, Load ramps, e.g. working platforms · CPC title

• F16H2061/0234

  Adapting the ratios to special vehicle conditions · CPC title

• B60W10/30

  including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps · CPC title