Systems and methods for brake regulation of motor vehicles

Abstract

A brake regulating system for motor vehicles is provided having an electronic control unit, by which an automatic parking brake function is activatable at a standstill of the motor vehicle, whose deactivation is performed as a function of the instantaneous drive torque, is implemented in such a way that in the event of activated parking brake function, a deactivation of the parking brake function may be suppressed if, on the basis of a function executed at a standstill of the motor vehicle, an automatic increase of the drive torque which does not result from a starting command of the driver is necessary.

Description

BRIEF DESCRIPTION OF THE DRAWING

FIG. 1 is a flow chart illustrating the method for brake regulation of a motor vehicle according to the present invention.

Claims

1. A method for brake regulation of motor vehicles having an electronic control unit, by which an automatic parking brake function is activatable at a standstill of the motor vehicle, whose deactivation is performed as a function of an instantaneous drive torque, the method comprising the acts of: in the event of an activated parking brake function, a deactivation of the parking brake function becomes suppressable if, on the basis of a function executed at a standstill of the motor vehicle, an automatic increase of the drive torque which does not result from a starting command of the driver is necessary.

2. The brake regulating method according to claim 1, wherein state changes of internal vehicle consumers causing an increase of the drive torque are monitored to detect an automatic increase of the drive torque.

3. The brake regulating method according to claim 1, wherein at least one of a corresponding absolute value, relative value, and a corresponding gradient value, of the drive torque increase is concluded as a function of the state change of a consumer.

4. The brake regulating method according to claim 2, wherein at least one of a corresponding absolute value, relative value, and a corresponding gradient value, of the drive torque increase is concluded as a function of the state change of a consumer.

5. The brake regulating method according to claim 3, wherein a base drive torque condition for deactivating the automatic parking brake function is corrected as a function of at least one of said absolute value, said relative value, and as a function of said gradient value, of the drive torque increase.

6. The brake regulating method according to claim 4, wherein a base drive torque condition for deactivating the automatic parking brake function is corrected as a function of at least one of said absolute value, said relative value, and as a function of said gradient value, of the drive torque increase.

7. The brake regulating method according to claim 3, wherein the brake torque required for activating the automatic parking brake function for the retention phase is compared to the drive torque, and the brake torque is increased if the automatic increase of the drive torque exceeds at least one of a defined absolute threshold value, a relative threshold value, and a defined gradient threshold value such that secure retention of the motor vehicle at a standstill may not be ensured.

8. The brake regulating method according to claim 4, wherein the brake torque required for activating the automatic parking brake function for the retention phase is compared to the drive torque, and the brake torque is increased if the automatic increase of the drive torque exceeds at least one of a defined absolute threshold value, a relative threshold value, and a defined gradient threshold value such that secure retention of the motor vehicle at a standstill may not be ensured.

9. The brake regulating method according to claim 5, wherein the brake torque required for activating the automatic parking brake function for the retention phase is compared to the drive torque, and the brake torque is increased if the automatic increase of the drive torque exceeds at least one of a defined absolute threshold value, a relative threshold value, and a defined gradient threshold value such that secure retention of the motor vehicle at a standstill may not be ensured.

10. A brake regulation system for a motor vehicle, comprising: means for activating an automatic parking brake function at a standstill of the motor vehicle;means for deactivating the automatic parking brake function as a function of an instantaneous drive torque; andmeans for suppressing the deactivation of the parking brake function based on a function executed at the standstill of the motor vehicle when an automatic increase of the drive torque is not a result of a starting command by a driver of the vehicle.