Method for control of a gearbox
AssigneeScania CV AB
InventorsFredrik Swartling, Mikael Wågberg
Life of this patent
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Abstract
A method for control of a gearbox intended to be installed in a motor vehicle, which method effects a downshift of the gearbox from a first gear (G1) for which the acceleration a of the vehicle is negative to a second gear (G2) for which the acceleration a is positive or substantially equal to nil. The downshift involves at least one intermediate gear step between the first gear (G1) and the second gear (G2). Each intermediate step lasts a longer time than a threshold value Ti. A system, a motor vehicle, a computer program and a computer program product, which perform the method is also disclosed.
Claims18
A method for control of a gearbox in a motor vehicle, wherein the vehicle comprises an engine, the gearbox being connected to the engine, and at least one control unit controlling the gearbox to change gears;
- the method comprising the step of:
- the at least one control unit effecting a downshift of the gearbox from a first gear for which acceleration a of the vehicle is negative to a second gear for which the acceleration a is positive or equal to nil, wherein the downshift involves at least one intermediate gear step between the first gear and the second gear, and each of the at least one intermediate gear step lasts a longer time than a threshold value.
A system for control of a gearbox, the system comprising at least one control unit for controlling a gearbox in a motor vehicle, the at least one control unit being configured for effecting a downshift of the gearbox from a first gear for which the acceleration a of the vehicle is negative to a second gear for which the acceleration a is positive or equal to nil, wherein the downshift involves at least one intermediate gear step between the first gear and the second gear, and each of the at least one intermediate step lasts a longer time than a threshold value.
Dependencies are inferred from the claim text.