US 7,627,415 B2 · Device and method for securing the standstill of a motor vehicle

Abstract

In a device for securing the standstill of a motor vehicle with a distance-related longitudinal dynamic control module, which is contained in at least one electronic control unit and by which the motor vehicle is decelerated down to a standstill while maintaining a defined distance from a target object, at least until reaching the standstill, a nominal brake torque is defined by the longitudinal dynamic control module for a brake control module. At a defined first time after a detected standstill of the motor vehicle, the longitudinal dynamic control module transmits a transfer signal to the brake control module. Thereupon, independently of the predefinition of a nominal brake torque by the longitudinal dynamic control module, the brake control module alone builds up and/or holds a wheel brake torque in the sense of a parking brake function. At a defined second time after a start command, the longitudinal dynamic control module defines again, by itself, a nominal brake torque, starting at the actual brake torque that is on hand at this time, for the purpose of decreasing the wheel brake torque.

Claims18

Dependent claims

A device for securing a standstill of a motor vehicle, comprising:

a distance-related longitudinal dynamic control module by which the motor vehicle is capable of being decelerated down to the standstill while maintaining a defined distance from a target object;
a brake control module;
wherein at least until reaching the standstill, a nominal brake torque is defined by the longitudinal dynamic control module for the brake control module;
wherein at a defined first time after the standstill of the motor vehicle is detected, the longitudinal dynamic control module transmits a transfer signal to the brake control module, whereupon the brake control module alone effects a wheel brake torque in a manner of a parking brake function independently of a predefinition of the nominal brake torque by the longitudinal dynamic control module;
wherein at a defined second time after a start command, the longitudinal dynamic control module again defines, by itself, for the brake control module, a nominal brake torque, starting at an actual brake torque on hand at this time period, for decreasing the wheel brake torque, and
wherein the defined first time after the standstill of the motor vehicle is detected is defined upon reaching a safety-nominal brake torque, set by the brake control module through predefinition of the longitudinal dynamic control module after the detected standstill.

3 more elements

A method for securing a standstill of a motor vehicle having a distance-related longitudinal dynamic control module and a brake control module, the distance-related longitudinal dynamic control module being capable of decelerating the motor vehicle to a standstill while maintaining a defined distance from a target object, the method comprising the acts of:

defining a nominal brake torque for a brake control module via the longitudinal dynamic control module at least until a standstill of the motor vehicle is reached;
detecting the standstill of the motor vehicle;
at a defined first time after detecting the standstill of the motor vehicle, transmitting a transfer signal from the longitudinal dynamic control module to the brake control module whereby the brake control module effects a wheel brake torque in a manner of a parking brake function independent of a predefined nominal brake torque by the longitudinal dynamic control module;
detecting issuance of a start command;
at a defined second time after the detection of the start command, defining a nominal brake torque for the brake control module by the longitudinal dynamic control module, the nominal brake torque starting at an actual brake torque on hand at the defined second time and being used for decreasing the wheel brake torque, and
wherein the defined first time after the detecting of the standstill is defined upon reaching a safety-nominal brake torque set by the brake control module through predefinition of the longitudinal dynamic control module after the standstill is detected.

3 more elements

Dependencies are inferred from the claim text.

Device and method for securing the standstill of a motor vehicle

Life of this patent

Device and method for securing the standstill of a motor vehicle

Life of this patent

Abstract

Claims18