METHOD FOR CONTROLLING AN AUTOMATIC TRANSMISSION OF A MOTOR VEHICLE
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Abstract
A method of controlling an automatic transmission of a vehicle in which a hold gear function is activated by a driver request and is deactivated independently of a return condition. To allow an effective, safe to operate, and comfortable use, the return condition depends on one of the following criteria or a useful combination of the same: a flexible time span, consideration of the vehicle stand still time; a rotational speed of the vehicle engine, or one or several parameters which correlate with the engine rotational speed, a new, the same, or a different drive request by the driver, a change in the operating condition of the vehicle, and a plausibility check occurring during the startup procedure.
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Citations
41 Claims
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1-25. -25. (canceled)
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26. A method of controlling an automatic transmission of a vehicle, in which a hold gear function is activated by a request from a driver and deactivated independently of a return condition, the method comprising the steps of:
determining the return condition by at least one of; a flexible time span which depends on a stand still time of the vehicle; either a rotational speed of an engine of the vehicle or at least one parameter correlated with the rotational speed of the engine; one of a new drive request, a same drive request, or a different drive request by the driver; a change in operating condition of the vehicle; and a plausibility check under consideration of a startup procedure. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A method of controlling an automatic transmission of a vehicle in which a hold gear function is activated by a request of a driver and, dependent on a return condition, being deactivated, whereby the return condition is one of determined depending on a rotational speed of the engine of the vehicle and at least one parameter which correlates with the rotational speed of the engine, the method comprising the step of:
deactivating the hold gear function if, under consideration of the request of the driver, the rotational speed or the at least one parameter either exceeds or falls below a prior determined upper or lower threshold value. - View Dependent Claims (37, 38, 39)
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40. A method of controlling an automatic transmission of a vehicle, in which a hold gear function is activated by a driver request, and deactivated depending on a return condition, the method comprising the step of:
determining the return condition by one of a new driver request and a different driver request, and deactivating the hold gear function, if the registered driver request is one of accompanied with a change of driving direction and leads to activation of a kick down switch.
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41. A method of controlling an automatic transmission of a vehicle, in which a hold gear function is activated by a driver request and deactivated depending on a return condition, the method comprising the step of:
determining the return condition by a change in operating state, and deactivating the hold gear function, if a temporary operating state for which the hold function is being requested, ends and a change takes place between one of uphill driving and downhill driving and between driving one of up and down a hill and driving on a same plane.
Specification