Fluid-pressure and analogous brake systems – Speed-controlled – Braking pressure demand or braking force desire
Patent
1996-10-30
1998-11-17
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Speed-controlled
Braking pressure demand or braking force desire
303125, B60T 706
Patent
active
058366601
ABSTRACT:
The invention provides a method for determining a threshold value for triggering an automatic brake application wherein a braking pressure greater than that corresponding to the position of the brake pedal is developed when the actuating speed of the brake pedal exceeds a triggering threshold value determined from a preset threshold value and a vehicle-specific correction factor. According to the invention, a standard curve is stored representing the relationship between the vehicle deceleration and the pedal travel, said standard curve having a pedal travel value sP0 for a vehicle deceleration aFZG0=0 m/s.sup.2. During a brake application, pairs of values for pedal travel and vehicle deceleration are determined several times, with a pedal travel value sPi0 being determined for a vehicle deceleration of 0 M/s.sup.2 corresponding to each value pair, based on a curve that is the same as the standard curve. A sliding average sPm is then calculated from the values of sPi0 obtained, and the relative deviation ABW=sPm/sP0 is then determined from the value sP0 as a vehicle-specific correction factor ABW. The triggering threshold value is then determined as a function of the product of the preset threshold value VS and the vehicle-specific correction factor ABW.
REFERENCES:
patent: 5575542 (1996-11-01), Tanaka et al.
patent: 5584542 (1996-12-01), Klarer et al.
patent: 5590937 (1997-01-01), Heibel
Brugger Franz
Eckl Albrecht
Kiesewetter Wolfgang
Knoff Bernd
Steiner Manfred
Graham Matthew C.
Mercedes-Benz AG
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