Method and brake system for traction control
First Claim
1. A method for traction control for use in automotive vehicles wherein wheel rotation is continuously monitored, with the wheel slip being determined by comparing the rotation of the driven wheels with the rotation of the non-driven wheels and/or a reference quantity such as the vehicle reference speed, and wherein the driving slip is controlled by a braking action on the wheel tending to spin up, said method comprising the steps of:
- determining the accelerator desired value and/or the deviation therefrom by a logical combination of the signals reflecting the wheel rotation and derived measured quantities;
compensating for the driving slip control already initiated; and
, signaling the accelerator values to the vehicle operator.
1 Assignment
0 Petitions
Accused Products
Abstract
For traction control, the wheel slip is determined by comparing the rotational velocity of the driven wheels with the rotational velocity of the non-driven wheels or with a reference quantity. In a wheel tending to spin up, the driving slip is reduced by a braking action. By logically combining the signals reflecting the rotational velocity of the wheel and taking into account the control process already initiated, the desired accelerator value or the deviation therefrom is determined and signaled to the vehicle operator. By observing the indicating instrument (26, 31), the vehicle operator is in a position to actuate the accelerator pedal in such a manner that a mere braking action will produce an optimum driving and starting slip and thus an optimum traction of the vehicle, without the risk of a brake overload condition occurring.
53 Citations
15 Claims
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1. A method for traction control for use in automotive vehicles wherein wheel rotation is continuously monitored, with the wheel slip being determined by comparing the rotation of the driven wheels with the rotation of the non-driven wheels and/or a reference quantity such as the vehicle reference speed, and wherein the driving slip is controlled by a braking action on the wheel tending to spin up, said method comprising the steps of:
- determining the accelerator desired value and/or the deviation therefrom by a logical combination of the signals reflecting the wheel rotation and derived measured quantities;
compensating for the driving slip control already initiated; and
, signaling the accelerator values to the vehicle operator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- determining the accelerator desired value and/or the deviation therefrom by a logical combination of the signals reflecting the wheel rotation and derived measured quantities;
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9. A method for traction control for use in automotive vehicles wherein wheel rotation is continuously monitored, with the wheel slip being determined by comparing the rotation of the driven wheels with the rotation of the non-driven wheels and/or a reference quantity such the vehicle reference speed, said method comprising the steps of:
- determining the accelerator desired value and/or the deviation therefrom by a logical combination of the signals reflecting the wheel rotation and derived measured quantities; and
, signaling the determined accelerator values to the vehicle operator directly or indirectly.
- determining the accelerator desired value and/or the deviation therefrom by a logical combination of the signals reflecting the wheel rotation and derived measured quantities; and
- 10. A brake system with traction control with sensors to monitor wheel rotation, with electronic circuits for logically combining and processing the sensor signals and for generating brake pressure control signals by means of which brake pressure can be metered into the wheel brake of the wheel tending to spin up, wherein said system is equipped with circuits (22'"'"') and indicating instruments (26, 31) which determine the accelerator desired value and/or the instantaneous deviation therefrom during a driving slip control phase and including means for signaling the determined accelerator values to the vehicle operator.
- 14. An apparatus for traction control of an automotive vehicle comprising sensors for monitoring the wheel rotation and with electronic circuitries for logically combining and processing the sensor signals, and further comprising circuits (22'"'"') and indicating instruments (26, 31) which determine the accelerator desired value and the instantaneous deviation therefrom and signal these to the vehicle operator.
Specification