Traction-slip control method with theoretical transversal acceleration and control circuit for carrying out such a traction-slip control method
First Claim
1. A traction slip control method for an automotive vehicle wherein a traction slip control phase for a respective drive wheel is activated by way of a control strategy when the traction slip of said wheel exceeds a predeterminable slip threshold value comprising the steps of:
- determining a reference transverse acceleration for a cornering maneuver to be expected;
determining an actual transverse acceleration;
calculating a difference between the reference transverse acceleration (ay-ref) and the actual transverse acceleration (ay-ist); and
determining whether the amount of the difference exceeds a limit value, and wherein in the case that the amount of the difference exceeds the limit value, modifying the control strategy so that a higher torque can be achieved at least on two wheels than in the case that the amount of the difference does not exceed the limit value.
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Accused Products
Abstract
The invention relates to a traction slip control method for an automotive vehicle wherein a traction slip control phase for a respective drive wheel is activated by way of a control strategy when the traction slip of said wheel exceeds a predeterminable slip threshold value This method includes a reference transverse acceleration that is recorded for a cornering maneuver to be expected, then an actual transverse acceleration is determined, a difference between the reference transverse acceleration (ay-ref) and the actual transverse acceleration (ay-ist) is calculated, and it is determined whether the amount of the difference exceeds a limit value, and wherein in the case when the amount of the difference exceeds the limit value, the control strategy is modified so that a higher torque can be achieved at least on two wheels than in the case that the amount of the difference does not exceed the limit value. Further, the invention provides a control circuit that implements the above method.
25 Citations
17 Claims
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1. A traction slip control method for an automotive vehicle wherein a traction slip control phase for a respective drive wheel is activated by way of a control strategy when the traction slip of said wheel exceeds a predeterminable slip threshold value comprising the steps of:
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determining a reference transverse acceleration for a cornering maneuver to be expected;
determining an actual transverse acceleration;
calculating a difference between the reference transverse acceleration (ay-ref) and the actual transverse acceleration (ay-ist); and
determining whether the amount of the difference exceeds a limit value, and wherein in the case that the amount of the difference exceeds the limit value, modifying the control strategy so that a higher torque can be achieved at least on two wheels than in the case that the amount of the difference does not exceed the limit value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A control circuit for controlling the driving stability of a vehicle, wherein defining input quantities for fixing a course are sensed and processed so that traction slip control can be performed by influencing a transmission of engine torques to individual wheels, comprising:
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a control circuit having a means for determining and/or storing a reference transverse acceleration for a cornering maneuver to be expected and a comparator;
wherein the comparator compares the reference transverse acceleration (ay-ref) with a determined actual transverse acceleration, and it is determined whether the amount of the difference exceeds a limit value; and
wherein in the case that the amount of the difference exceeds the limit value, the slip control is modified so that a higher torque can be achieved at least on two wheels than in the case that the amount of the difference does not exceed the limit value. - View Dependent Claims (10)
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11. A traction slip control method for an automotive vehicle wherein a traction slip control phase for a respective drive wheel is activated by way of a control strategy when the traction slip of said wheel exceeds a predeterminable slip threshold value comprising the steps of:
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determining a reference transverse acceleration for a cornering maneuver to be expected;
determining an actual transverse acceleration;
calculating a difference between the reference transverse acceleration (ay-ref) and the actual transverse acceleration (ay-ist); and
determining whether the amount of the difference exceeds a limit value, and wherein in the case that the amount of the difference exceeds the limit value, modifying the control strategy so that a higher torque can be achieved on all driven wheels than in the case that the amount of the difference does not exceed the limit value. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification