Method and apparatus for controlling a brake system of a vehicle
AssigneeRobert Bosch GmbH
InventorWerner Stumpe
Life of this patent
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Abstract
The pressure in the brake system is adjusted by an electronic control unit to conform to a nominal value, and the onset of the braking action is derived from the detection of the reaction of the vehicle body during the braking operation. The nominal value is determined based on the driver's command and the measured pressure in the brake system at the onset of braking.
Claims10
Method for controlling a brake system of a motor vehicle having a body which reacts to a braking action, said vehicle further comprising at least one axle which is mounted to said body by spring means, and wheels having brakes on each said at least one axle, said method comprising
- determining a nominal value of a variable representing braking action at at least one wheel as a function of a command from the driver,
- controlling the braking action at said at least one wheel on the basis of said nominal value,
- measuring the reaction of the vehicle body to said braking action,
- determining the onset of braking action at said at least one wheel based on the reaction of the vehicle body to said braking action,
- detecting the value of said varisable when the onset of braking action is determined, and
- correcting said nominal value at each said at least one wheel as a function of the value of said variable when the onset of braking is determined.
Apparatus for controlling a brake system of a motor vehicle having a body which reacts to braking action, said vehicle further comprising at least one axle which is mounted to said body by spring means, and wheels having brakes on each said at least one axle, said apparatus comprising
- a transmitter which transmits a signal representing the driver's command,
- means for determining a nominal value of a variable representing braking action at said at least one wheel,
- means for measuring the reaction of the vehicle body to braking action,
- an electronic control unit which determines onset of braking action at at least one wheel based on the reaction of said vehicle body to said braking action, and which corrects the nominal value of said variable based on said driver's command and said reaction of the vehicle body to said braking action, and
- control valve means which adjusts the variable to conform to said corrected nominal valve of said variable.
Dependencies are inferred from the claim text.