Method for regulating a predetermined modifiable brake pressure
First Claim
1. Method for regulating a predetermined modifiable brake pressure in the wheel brakes of a brake system which includes an actuating device and at least one hydraulic valve, the method comprising:
- monitoring a pressure associated with the actuating device;
determining a nominal pressure for the wheel brakes based on the monitored actuating device pressure;
providing a characteristic curve that correlates a valve current of the hydraulic valve with a pressure difference between the nominal pressure for the wheel brakes and the monitored actuating device pressure;
determining the pressure difference between the nominal pressure for the wheel brakes and the monitored actuating device pressure; and
comparing the determined pressure difference to the characteristic curve and determining a correcting variable of the hydraulic valve according to the characteritstic curvewherein the nominal pressure is determined according to the function Pnomnial=Ppoint of max. boosting+factor K ×
PTMC−
Ppoint of max. boosting) with Pnomnial=nominal pressure, Ppoint of max. boosting=pressure at the point of maximum boosting of an associated brake booster and PTMC=pressure of the actuating device.
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Abstract
The present invention relates to a method for regulating a predetermined modifiable brake pressure in the wheel brakes of a brake system, wherein input quantities determining the brake pressure in the individual wheel brakes are evaluated and correcting variables of hydraulic valves are defined in a control and/or data processing system. To obviate the need for additional pressure sensors which register the pressure in the wheel brakes, it is arranged for by the invention that a characteristic curve is stored in the control or data processing system, said curve correlating the valve characteristics of the hydraulic valve with a pressure difference of the hydraulic valve, and the correcting variable of the hydraulic valve is defined according to the characteristic curve.
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Citations
8 Claims
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1. Method for regulating a predetermined modifiable brake pressure in the wheel brakes of a brake system which includes an actuating device and at least one hydraulic valve, the method comprising:
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monitoring a pressure associated with the actuating device; determining a nominal pressure for the wheel brakes based on the monitored actuating device pressure; providing a characteristic curve that correlates a valve current of the hydraulic valve with a pressure difference between the nominal pressure for the wheel brakes and the monitored actuating device pressure; determining the pressure difference between the nominal pressure for the wheel brakes and the monitored actuating device pressure; and comparing the determined pressure difference to the characteristic curve and determining a correcting variable of the hydraulic valve according to the characteritstic curve wherein the nominal pressure is determined according to the function Pnomnial=Ppoint of max. boosting+factor K ×
PTMC−
Ppoint of max. boosting) with Pnomnial=nominal pressure, Ppoint of max. boosting=pressure at the point of maximum boosting of an associated brake booster and PTMC=pressure of the actuating device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification