Process for influencing the parameters of a car's dynamic behavior
First Claim
1. A method of influencing dynamic parameters of a vehicle equipped with one wheel sensor for each vehicle wheel to determine individual rotational wheel speeds, the method comprising the step of:
- upon malfunction of a wheel sensor, applying a two-operation-point control on the frictional-value-over-slip curve to the wheel with the malfunctioning wheel sensor, wherein the two operation points on the curve are independent of the rotational speed of the wheel with the malfunctioning wheel sensor.
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Accused Products
Abstract
To set the brake or traction slip of a wheel at the maximum of the frictional value/slip curve, it is necessary that the wheel sensor associated with each wheel to sense its rotational speed is in a state of operation. Otherwise it is not possible to ascertain the slip of the respective wheel. In order to ensure an emergency function for influencing driving dynamics parameters even in the event of malfunction of a wheel sensor, the present invention discloses performing a two-point control when a wheel sensor is defective. A first operating point (A) lies at a longitudinal slip equal to zero, and a second operating point (B) lies at a longitudinal slip of 100%. Without a longitudinal slip, lateral forces can be transmitted to their maximum, whereas at 100% longitudinal slip longitudinal forces can still be transmitted almost to their maximum.
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Citations
13 Claims
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1. A method of influencing dynamic parameters of a vehicle equipped with one wheel sensor for each vehicle wheel to determine individual rotational wheel speeds, the method comprising the step of:
upon malfunction of a wheel sensor, applying a two-operation-point control on the frictional-value-over-slip curve to the wheel with the malfunctioning wheel sensor, wherein the two operation points on the curve are independent of the rotational speed of the wheel with the malfunctioning wheel sensor. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method which provides braking pressure control for the purpose of yaw torque control of a body in motion, the method comprising the steps of:
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receiving wheel sensor output signals; and
determining from the wheel sensor output signals whether a wheel sensor for a wheel has malfunctioned;
wherein if the wheel sensor has malfunctioned, applying a two-operation-point control having a first operating point and a second operating point on a friction-value-over-slip curve for the wheel with the malfunctioning wheel sensor to determine a brake pressure for the wheel with the malfunctioning wheel sensor for the purpose of yaw torque control of the body in motion. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification