Slip control system for vehicle
First Claim
1. A slip control system for a vehicle comprising a traction control means for effecting traction control in which the amount of slip of the driving wheels of the vehicle relative to the road surface is detected and the engine output is controlled with a predetermined control variable so that the amount of slip of the driving wheels converges on a target value wherein the improvement comprisesa first determining means which determines that the friction coefficient μ
- of the road surface is high,a limiting means which limits the control variable for said traction control when the first determining means determines that the friction coefficient μ
of the road surface is high and the engine speed is not higher than a predetermined value while the traction control is being effected, anda limitation releasing means which releases the limitation of the control variable when the engine speed increases by a predetermined value from a minimum engine speed to which the engine speed fell as a result of the traction control before limitation of the control variable.
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Accused Products
Abstract
Attraction control system for a vehicle detects the amount of slip of the driving wheels of the vehicle relative to the road surface and controls the engine output with a predetermined control variable so that the amount of slip of the driving wheels converges on a target value. The control variable for the traction control is limited when it is determined that the friction coefficient μ of the road surface is high and the engine speed is not higher than a predetermined value while the traction control is being effected. The limitation of the control variable is released when the engine speed increases by a predetermined value from a minimum engine speed to which the engine speed fell as a result of the traction control before limitation of the control variable.
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Citations
19 Claims
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1. A slip control system for a vehicle comprising a traction control means for effecting traction control in which the amount of slip of the driving wheels of the vehicle relative to the road surface is detected and the engine output is controlled with a predetermined control variable so that the amount of slip of the driving wheels converges on a target value wherein the improvement comprises
a first determining means which determines that the friction coefficient μ - of the road surface is high,
a limiting means which limits the control variable for said traction control when the first determining means determines that the friction coefficient μ
of the road surface is high and the engine speed is not higher than a predetermined value while the traction control is being effected, anda limitation releasing means which releases the limitation of the control variable when the engine speed increases by a predetermined value from a minimum engine speed to which the engine speed fell as a result of the traction control before limitation of the control variable. - View Dependent Claims (2, 3, 4, 5)
- of the road surface is high,
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6. A slip control system for a vehicle comprising a traction control means for effecting traction control in which the amount of slip of the driving wheels of the vehicle relative to the road surface is detected and the engine output is controlled with a predetermined control variable so that the amount of slip of the driving wheels converges on a target value wherein the improvement comprises
a reverse detecting means which detects that the vehicle once reversed before it began to run forward upon start on an ascending slope, and a first limiting means which limits the control variable for said traction control when the reverse detecting means detects that the vehicle once reversed before it began to run forward upon start on an ascending slope.
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14. A slip control system for a vehicle comprising a traction control means for effecting traction control in which the amount of slip of the driving wheels of the vehicle relative to the road surface is detected and the engine output is controlled with a predetermined control variable so that the amount of slip of the driving wheels converges on a target value wherein the improvement comprises
a friction coefficient determining means which determines whether the friction coefficient μ - of the road surface is high or low,
a limiting means which more limits the control variable for said traction control when the friction coefficient determining means determines that the friction coefficient μ
of the road surface is high than when the friction coefficient determining means determines that the friction coefficient μ
of the road surface is low, and an inhibiting means which inhibits the friction coefficient determining means from determining that the friction coefficient μ
of the road surface is high after it determines that the friction coefficient μ
of the road surface is low until the current traction control is terminated. - View Dependent Claims (15, 16, 17, 18, 19)
- of the road surface is high or low,
Specification