Method for controlling an automatic transmission of a motor vehicle in the braking phase
First Claim
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1. A method for controlling an automatic transmission of a motor vehicle in a braking phase, comprising:
- determining a value of transmission ratio or rpm demanded based on pre-established rules;
determining, on the basis of a value and of parameters representative of a situation of the vehicle, a corrected value of transmission ratio or rpm capable of inducing early downshifting of the automatic transmission;
wherein the corrected value is determined on the basis of an estimate of the primary rpm desired for the automatic transmission.
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Abstract
A method for controlling an automatic gearbox pertaining to a motor vehicle in a braking phase. According to the method, a gear ratio or speed value of the gearbox, requested on the basis of pre-established laws, is determined; and, on the basis of the value and parameters representative of the situation of the vehicle, a corrected gear ratio or speed value of the gearbox, able to trigger an anticipated downshifting of the automatic gearbox, is determined. The corrected gear ratio value of the gearbox is determined on the basis of an estimation of the desired primary speed for the automatic gearbox.
8 Citations
12 Claims
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1. A method for controlling an automatic transmission of a motor vehicle in a braking phase, comprising:
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determining a value of transmission ratio or rpm demanded based on pre-established rules; determining, on the basis of a value and of parameters representative of a situation of the vehicle, a corrected value of transmission ratio or rpm capable of inducing early downshifting of the automatic transmission; wherein the corrected value is determined on the basis of an estimate of the primary rpm desired for the automatic transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification