Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Indication or control of braking – acceleration – or deceleration
Reexamination Certificate
1999-02-19
2001-06-19
Cuchlinski, Jr., William A. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Indication or control of braking, acceleration, or deceleration
C701S022000, C303S068000, C303S191000, C303S116100, C303S122050, C303S115200
Reexamination Certificate
active
06249736
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a method and device for controlling a braking system in open loop.
BACKGROUND INFORMATION
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, 1996, pp. 105-112 describes a conventional method and device for an electrohydraulic braking system. A driver braking input of the electrohydraulic braking system is derived from the actuation of the brake pedal by the driver. This braking input is converted, possibly in view of further operating variables, into setpoint brake pressures for the individual wheel brakes.
The setpoint braking pressures are adjusted for each wheel by closed pressure-control loops on the basis of the predefined setpoint pressure, and of the actual brake pressure measured in the area of the wheel brake. Since the brake pressure in the wheel brakes in such an electrohydraulic braking system is adjusted and modulated by electrical means via valve arrangements, dependent upon the driver's braking input, it is necessary to monitor the correct functioning of the pressure modulation, and suitable measures in case of a fault are necessary to ensure the performance reliability of the braking system.
SUMMARY OF THE INVENTION
An object of the present invention is to provide measures, with whose aid the adjustment of the braking pressure in the wheel brakes can be reliably monitored, and which ensure a secondary braking operation in the case of a fault.
The present invention provides for reliable monitoring of the components regulating the pressure at the individual wheel brakes. It is particularly advantageous that various fault representations can be distinguished, so that in the event of a fault, in each case the suitable secondary braking operation is initiated depending on the fault representation occurring. These measures substantially improve the performance reliability and availability of the braking system.
It is particularly advantageous that the electrical braking control does not have to be switched off in response to every occurring fault, but rather that only partial shut-downs of the electrical system are carried out depending on the fault condition.
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Jonner et al., “Electrohydrau lic 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.
Binder Jurgen
Gottwick Ulrich
Schmidt Gunther
Winner Hermann
Cuchlinski Jr. William A.
Kenyon & Kenyon
Robert & Bosch GmbH
To Tuan C
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