METHOD FOR THE CONTROL OF AN AUTOMATIC TRANSMISSION OF A MOTOR VEHICLE, CONTROL DEVICE FOR AN AUTOMATIC TRANSMISSION OF A MOTOR VEHICLE AND MOTOR VEHICLE
First Claim
1. A method for control of an automatic transmission of a motor vehicle at least during downhill driving of the motor vehicle in a coasting mode, comprising:
- setting a desired speed vset of the motor vehicle for a cruise control system of the motor vehicle;
determining a nominal acceleration aset of the motor vehicle and a current acceleration aactual of the motor vehicle;
comparing the nominal acceleration aset with the current acceleration aactual;
activating a downhill driving mode of a control device of the automatic transmission if aactual is ≧
(aset+Δ
a), where Δ
a is a predetermined value and Δ
a>
0;
determining a first position of an accelerator pedal of the motor vehicle, the first position indicative of a possible actuation of the accelerator pedal;
determining a first current speed vactual-1 of the motor vehicle;
comparing the first current speed vactual-1 with the desired speed vset; and
downshifting from a currently engaged gear of the automatic transmission into a next lower gear if vactual-1 is ≧
(vset+Δ
v), where Δ
v is a predetermined value and Δ
v is >
0, and if the first position of the accelerator pedal identifies a non-existent actuation of the accelerator pedal.
2 Assignments
0 Petitions
Accused Products
Abstract
A method is provided for the control of an automatic transmission of a motor vehicle at least during downhill driving of the motor vehicle in coasting mode. The method includes, but is not limited to setting of a desired speed vset of the motor vehicle for a cruise control system of the motor vehicle, determining of a nominal acceleration aset of the motor vehicle and a current acceleration aactual of the motor vehicle and comparing of the nominal acceleration aset with the current acceleration aset takes place. In addition, activating of a downhill driving mode of a control device of the automatic transmission if anactual is ≧(aset+Δa) and determining of a first position of an accelerator pedal of the motor vehicle takes place. In addition, determining of a first current speed vactual-1 of the motor vehicle and comparing of the first current speed vactual-1 with the desired speed vset takes place. In addition, downshifting from the currently engaged gear of the automatic transmission into the next lower gear if v vactual-1 is ≧(vset+Δv) and if the determined first position of the accelerator pedal identifies a non-existent actuation of the accelerator pedal takes place.
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Citations
20 Claims
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1. A method for control of an automatic transmission of a motor vehicle at least during downhill driving of the motor vehicle in a coasting mode, comprising:
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setting a desired speed vset of the motor vehicle for a cruise control system of the motor vehicle; determining a nominal acceleration aset of the motor vehicle and a current acceleration aactual of the motor vehicle; comparing the nominal acceleration aset with the current acceleration aactual; activating a downhill driving mode of a control device of the automatic transmission if aactual is ≧
(aset+Δ
a), where Δ
a is a predetermined value and Δ
a>
0;determining a first position of an accelerator pedal of the motor vehicle, the first position indicative of a possible actuation of the accelerator pedal; determining a first current speed vactual-1 of the motor vehicle; comparing the first current speed vactual-1 with the desired speed vset; and downshifting from a currently engaged gear of the automatic transmission into a next lower gear if vactual-1 is ≧
(vset+Δ
v), where Δ
v is a predetermined value and Δ
v is >
0, and if the first position of the accelerator pedal identifies a non-existent actuation of the accelerator pedal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A control device for an automatic transmission of a motor vehicle, comprising:
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a first determination unit adapted to determine a nominal acceleration aset of the motor vehicle and a current acceleration aactual of the motor vehicle; a first comparison unit adapted to compare the nominal acceleration aset with the current acceleration aactual; an activation unit adapted to activate a downhill driving mode of the control device if aactual is ≧
(aset+Δ
a), where Δ
a is a predetermined value and wherein Δ
a is >
0;a second determination unit adapted to determine a first position of an accelerator pedal of the motor vehicle, where the first position of the accelerator pedal is indicative of a possible actuation of the accelerator pedal; a second comparison unit adapted to compare a first determined current speed vactual-1 of the motor vehicle with a set desired speed vset of the motor vehicle; a shifting unit adapted to downshift from a currently engaged gear of the automatic transmission into a next lower gear if vactual-1 is ≧
(vset+Δ
v), where Δ
v is a predetermined value and wherein Δ
v is >
0, and if the first position of the accelerator pedal identifies a non-existent actuation of the accelerator pedal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A computer readable medium embodying a computer program product, said computer program product comprising:
a program for controlling of an automatic transmission of a motor vehicle, the program configured to; determine a nominal acceleration aset of the motor vehicle and a current acceleration aactual of the motor vehicle with a first determination unit; compare the nominal acceleration aset with the current acceleration aactual by means of a first comparison unit; activate a downhill driving mode of a control device with an activation unit if aactual is ≧
(aset+Δ
a), where Δ
a is a predetermined value and wherein Δ
a is >
0;determine a first position of an accelerator pedal of the motor vehicle with a second determination unit, where the first position of the accelerator pedal identifies a possible actuation of the accelerator pedal; compare a first determined current speed vactual-1 of the motor vehicle with a set desired speed vset of the motor vehicle with a second comparison unit; and initiate a downshift from a currently engaged gear of the automatic transmission into a next lower gear with a shifting unit, if vactual-1 is ≧
(vset+Δ
v), where Δ
v is a predetermined value and wherein Δ
v is >
0, and if the first position of the accelerator pedal identifies a non-existent actuation of the accelerator pedal.
Specification