Method for shifting an electrically shiftable transmission for a vehicle, in particular a commercial vehicle

Patent metadata

Field	Value
Publication number	US-12460719-B2
Application number	US-202418406560-A
Country	US
Kind code	B2
Filing date	Jan 8, 2024
Priority date	Jan 11, 2023
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

A method ( 100 ) for shifting an electrically shiftable transmission ( 230 ) for a vehicle ( 200 a ), such as a commercial vehicle, is provided. The method ( 100 ) includes ascertaining ( 110 ) a constraint ( 310 ) relating to a shifting element ( 235 ) of the transmission ( 230 ) and determining ( 120 ) a motion profile ( 300 ) for the shifting element ( 235 ). The motion profile ( 300 ) defines a position (P) of the shifting element ( 235 ) as a function of time (t). The method further includes outputting ( 130 ) a regulation signal ( 255 ) for regulating the position of the shifting element ( 235 ) on the basis of the motion profile ( 300 ).

First claim

The invention claimed is:

1 . A method ( 100 ) for shifting an electrically shiftable transmission ( 230 ) for a vehicle ( 200 a ), wherein the method ( 100 ) comprises the steps of:
ascertaining ( 110 ) a constraint ( 310 ) relating to a shifting element ( 235 ) of the transmission ( 230 ); determining ( 120 ) a motion profile ( 300 ) for the shifting element ( 235 ) on the basis of the constraint, wherein the motion profile ( 300 ) defines a position (P) of the shifting element ( 235 ) as a function of time (t); and outputting ( 130 ) a regulation signal ( 255 ) for regulating the position of the shifting element ( 235 ) on the basis of the motion profile ( 300 ); wherein the constraint ( 310 ) comprises an impact velocity ( 315 ) at a constraint position (P 2 , P 3 ).

2 . The method according to claim 1 , wherein a value of the impact velocity ( 315 ) at the constraint position (P 2 , P 3 ) satisfies a threshold condition ( 318 ).

3 . The method according to claim 1 , wherein the constraint ( 310 ) relates to a force ( 316 ) characteristic of shifting the transmission ( 230 ).

4 . The method according to claim 1 , wherein the motion profile ( 300 ) has a polynomial relationship ( 301 ) between the position (P) of the shifting element ( 235 ) and time (t).

5 . The method according to claim 1 , wherein the motion profile ( 300 ) has a variable velocity (v) between constraint positions (P 1 , P 2 , P 2 ′, P 3 ) defined by the constraint ( 310 ).

6 . The method according to claim 1 , wherein the constraint ( 310 ) relates to a plurality of shifting elements ( 235 , 236 ), and the motion profile ( 300 ) is determined for the plurality of shifting elements ( 235 , 236 ).

7 . A computer having a non-transitory computer-readable medium having instructions stored thereon, the instructions comprising commands which, when executed by a processor, cause the computer to carry out the method ( 100 ) according to claim 1 .

8 . A control device ( 250 ) configured to carry out the method according to claim 1 for the vehicle ( 200 a ) with the electrically shiftable transmission ( 230 ).

9 . The electrically shiftable transmission ( 230 ) with the shifting element ( 235 ) and the control device ( 250 ) according to claim 8 , wherein the transmission includes a motor for actuating the shifting element.

10 . The electrically shiftable transmission ( 230 ) according to claim 9 , wherein the motor of the transmission ( 230 ) is an electronically commutated synchronous motor ( 232 ) for actuating the shifting element ( 235 ).

11 . The vehicle ( 200 a ) with the electrically shiftable transmission ( 230 ) according to claim 9 , wherein the vehicle is a commercial vehicle.

12 . A method ( 100 ) for shifting an electrically shiftable transmission ( 230 ) for a vehicle ( 200 a ), wherein the method ( 100 ) comprises the steps of:
ascertaining ( 110 ) a constraint ( 310 ) relating to a shifting element ( 235 ) of the transmission ( 230 ); determining ( 120 ) a motion profile ( 300 ) for the shifting element ( 235 ) on the basis of the constraint, wherein the motion profile ( 300 ) defines a position (P) of the shifting element ( 235 ) as a function of time (t); and outputting ( 130 ) a regulation signal ( 255 ) for regulating the position of the shifting element ( 235 ) on the basis of the motion profile ( 300 ); wherein the constraint ( 310 ) defines a tooth-to-tooth position ( 231 ) of the transmission ( 230 ).

13 . The method according to claim 12 , wherein the constraint ( 310 ) relates to a plurality of shifting elements ( 235 , 236 ), and the motion profile ( 300 ) is determined for the plurality of shifting elements ( 235 , 236 ).

14 . The method according to claim 12 , wherein the constraint ( 310 ) relates to a force ( 316 ) characteristic of shifting the transmission ( 230 ).

15 . The method according to claim 12 , wherein the motion profile ( 300 ) has a polynomial relationship ( 301 ) between the position (P) of the shifting element ( 235 ) and time (t).

16 . The method according to claim 12 , wherein the motion profile ( 300 ) has a variable velocity (v) between constraint positions (P 1 , P 2 , P 2 ′, P 3 ) defined by the constraint ( 310 ).

17 . A computer having a non-transitory computer-readable medium having instructions stored thereon, the instructions comprising commands which, when executed by a processor, cause the computer to carry out the method ( 100 ) according to claim 12 .

18 . A control device ( 250 ) configured to carry out the method according to claim 12 for the vehicle ( 200 a ) with the electrically shiftable transmission ( 230 ).

19 . The electrically shiftable transmission ( 230 ) with the shifting element and the control device ( 250 ) according to claim 18 , wherein the transmission ( 230 ) has an electronically commutated synchronous motor ( 232 ) for actuating the shifting element ( 235 ).

20 . A method ( 100 ) for shifting an electrically shiftable transmission ( 230 ) for a vehicle ( 200 a ), wherein the method ( 100 ) comprises the steps of:
ascertaining ( 110 ) a constraint ( 310 ) relating to a shifting element ( 235 ) of the transmission ( 230 ); determining ( 120 ) a motion profile ( 300 ) for the shifting element ( 235 ) on the basis of the constraint, wherein the motion profile ( 300 ) defines a position (P) of the shifting element ( 235 ) as a function of time (t); and outputting ( 130 ) a regulation signal ( 255 ) for regulating the position of the shifting element ( 235 ) on the basis of the motion profile ( 300 ); wherein the constraint ( 310 ) relates to a plurality of shifting elements ( 235 , 236 ), and the motion profile ( 300 ) is determined for the plurality of shifting elements ( 235 , 236 ); wherein the constraint ( 310 ) comprises impact velocities ( 315 ) at a constraint position (P 2 , P 3 ), and a value of each of the impact velocities ( 315 ) at the constraint position (P 2 , P 3 ) satisfies a threshold condition ( 318 ).

Assignees

• Zf Cv Systems Global Gmbh

Inventors

• Callesen Matthias
• Winkelholz Uwe

Classifications

• F16H2061/2823

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• F16H2061/047

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• F16H61/32

  Electric motors  {, actuators or related electrical control means}  therefor · CPC title

• F16H59/68

  Inputs being a function of gearing status · CPC title

• B60Y2200/14

  Trucks; Load vehicles, Busses · CPC title