Gear shift control device of automatic transmission for variable stage upshift against wheel slip
First Claim
1. A gear shift control device of an automatic transmission of a vehicle having a pair of drive wheels and a pair of driven wheels, comprising:
- a means for estimating slip angle of at least one of the pair of drive wheels;
a means for estimating slip ratio of said at least one drive wheel;
a means for determining an upshift of the automatic transmission when the absolute value of said estimated slip ratio is greater than a threshold value; and
a means for executing upshift of the automatic transmission according to said upshift determined by said upshift determination means;
wherein said upshift determination means determines said upshift to be of a greater number of stage within an available range against the absolute value of said estimated slip ratio according as the absolute value of said estimated slip angle is greater.
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Accused Products
Abstract
A gear shift control device of an automatic transmission of a vehicle, including a slip angle estimator for estimating a slip angle of at least one of a pair of drive wheels; a slip ratio estimator that estimates the slip ratio of the one drive wheel; a determiner that determines an upshift of the automatic transmission when the absolute value of the estimated slip ratio is greater than a threshold value; and a upshift executor for executing the upshift automatic transmission according to the upshift determined by the determiner, wherein the determiner determines the upshift to be of a greater number of stage within an available range against the absolute value of the estimated slip ratio according as the absolute value of the estimated slip angle is greater.
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Citations
3 Claims
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1. A gear shift control device of an automatic transmission of a vehicle having a pair of drive wheels and a pair of driven wheels, comprising:
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a means for estimating slip angle of at least one of the pair of drive wheels; a means for estimating slip ratio of said at least one drive wheel; a means for determining an upshift of the automatic transmission when the absolute value of said estimated slip ratio is greater than a threshold value; and a means for executing upshift of the automatic transmission according to said upshift determined by said upshift determination means; wherein said upshift determination means determines said upshift to be of a greater number of stage within an available range against the absolute value of said estimated slip ratio according as the absolute value of said estimated slip angle is greater. - View Dependent Claims (2, 3)
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Specification