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AssigneeMercedes-Benz AG
InventorsAdam Zomotor, Walter Klinkner, Erich Schindler, Frank-Werner Mohn, Thomas Wohland
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A method and apparatus prevents instabilities in vehicle handling by forming a desired value of the vehicle yaw angle rate .mu..sub.des from measured values (namely, vehicle speed, steering wheel angle), and forming the actual value of the vehicle yaw angle rate .mu..sub.act from at least one sensor signal. The difference between the desired value of the yaw angle rate .mu..sub.des and the actual value of the yaw angle rate .mu..sub.act is formed by subtracting the actual value of the yaw angle rate .mu..sub.act from the desired value of the yaw angle rate .mu..sub.des. At least one output signal is generated and emitted by the computer unit, from this difference. The output signal represents the detected driving situation with respect to the yaw behavior of the vehicle, with the brake pressure of individual wheels of the vehicle being varied as a function of this output signal, and the output signal being generated in the computer unit as a function of a time derivative of the difference. The output signal contains information on whether the vehicle has understeering or oversteering handling. In the case of oversteering handling, the brake pressure is increased for the vehicle front wheel on the outside of the turn; in the case of understeering handling, the brake pressure is increased for the vehicle rear wheel on the inside of the turn.
A method for preventing instabilities in handling of a vehicle, comprising the steps of
A method for preventing instabilities in handling of a vehicle, comprising the steps of
An apparatus for preventing instabilities in the handling of a vehicle, comprising a computer unit is configured such that a desired value of the vehicle yaw angle rate .mu..sub.des is formed from measured values, means for supplying at least one sensor signal to the computer unit from which the actual value of the vehicle yaw angle rate .mu..sub.act is formed, wherein the computer unit forms the difference between the desired value of the yaw angle rate .mu..sub.des and the actual value of the yaw angle rate .mu..sub.act, forms a time derivative of said difference and generates at least one output signal from said difference and as a function of said time derivative, said output signal containing information on whether the vehicle has oversteering or understeering handling, and means for varying brake slip of individual wheels of the vehicle as a function of said output signal, wherein in a case of oversteering handling, the brake slip is increased for a front wheel of the vehicle on an outside of a turn, and in a case of understeering handling, the brake slip is increased for a rear wheel of the vehicle on an inside of a turn.
Dependencies are inferred from the claim text.