Method and device for controlling a braking system in open loop

Details Method and device for controlling a braking system in open loop Method and device for controlling a braking system in open loop

1999-02-19

2000-12-19

Mar, Michael

Fluid-pressure and analogous brake systems

Speed-controlled

With failure responsive means

30312204, B60T 888

Patent

active

061619043

ABSTRACT:
A method and a device for controlling a braking system of a motor vehicle in open loop, in which a driver's braking input is converted into setpoint wheel-brake pressures for the individual wheel brakes, and the wheel-brake pressure is adjusted to the setpoint wheel-brake pressure in view of the measured wheel-brake pressure. Various secondary braking operations are initiated as a function of the type of fault. In response to a serious fault such as failure of the electrical energy supply, of the pressure supply, or an electrical fault in the control unit of the braking system, the valve arrangements controlling the wheel-brake pressures are switched over into a currentless state, and in response to a fault in detecting the driver's braking input, only the valve arrangements allocated to the front axle are switched into a currentless state. Furthermore, in response to a fault affecting the ability to build up or reduce pressure at only one wheel, an electrical open-loop control is implemented at only three wheel brakes, and in response to a fault which affects the ability to build up or reduce pressure at only one wheel of an axle without impairing the ability to build up and reduce pressure at this wheel, a shared control of one axle is carried out within the framework of a closed pressure-control loop.

REFERENCES:
patent: 5201573 (1993-04-01), Leiber et al.
patent: 5707117 (1998-01-01), Hu et al.
patent: 5752748 (1998-05-01), Schramm et al.
patent: 6003961 (1998-05-01), Binder et al.
Jonner et al., "Electrohydraulic Brake System--The First Approach to Brake-By -Wire Technology," SAE (Society of Automotive Engineers) Technical Paper Series, Paper No. 960991, International Congress & Exposition, Detroit, Michigan, Feb. 26-29, 1996, pp. 105-112.

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