Lucas Automotive Gmbh

Ralf Kinder

Ralf Leiter

Gregor Poertzgen

Lorenz Maack

Franz-Josef Endres

Reza Shokoufandeh

Gerhard Klapper

Andreas Söns

Michael Keller

Gregor Godlewsky

Thomas Maur

Ralf Erben

Andreas Müller

Matthias Jumpertz

Andreas Mueller

A technique for controlling an electrically actuable parking brake of a motor vehicle in the event of failure of a first signal indicating a speed of the motor vehicle comprises the steps of continuously closing the parking brake as long as a second signal indicating a driver request to close the parking brake is detected, and opening the parking brake, provided that the parking brake is in a partially open state, as long as an absence of the second signal is detected.

Controlling an electrically actuable parking brake in the event of failure of a speed signal

A method for releasing an electric parking brake of a motor vehicle comprises detecting a release command and releasing the parking brake if a detected change in at least one signal precedes by maximally a predefined time interval, the change indicating capacity of a driver to act.

Method for releasing an electrical parking brake

In a method and system for controlling a braking system, equipped with an electric parking brake, for a motor vehicle, the electric parking brake is released in response to an identification of a moving-off operation. A release instant of the electric parking brake is defined in dependence on at least one measured parameter of a clutch engagement operation. In comparison with a method and system in which, for example, the electric parking brake is released in dependence on the actuation of the accelerator by a driver, the method and system permit a more precise coordination of the deactivation of the electric parking brake with the clutch engagement operation, and thus with the moving-off operation of the vehicle, particularly in the case of a vehicle equipped with a manual transmission.

Method and system for controlling a braking system equipped with an electric parking brake

The present invention provides a method and a system for controlling a braking equipment of a motor vehicle in order to activate the braking equipment at a standstill of the motor vehicle such that braking forces are built up which are necessary to keep the motor vehicle in a state of standstill. To this end it is established on the basis of vehicle movements whether the vehicle is at a standstill. If vehicle movements are detected that cannot occur during driving modes of the motor vehicle, the motor vehicle is in a state of standstill. Subsequently, the braking equipment, and in particular a holding brake mechanism included in the braking equipment, are activated. In order to provide braking forces keeping the motor vehicle at a standstill also when it is on a slope, the braking equipment, and in particular the holding brake mechanism, are controlled in response of the vehicle inclination present in the state of standstill.

Method and system for controlling brake equipment which can be activated when a motor vehicle is stationary

The present invention provides driveaway assistance for a motor vehicle having braking equipment which, in the standstill condition of the motor vehicle, automatically or under the control of a vehicle driver summons up braking forces needed for the standstill condition. To assist start-up (driveaway) of the motor vehicle through a reduction of the braking forces generated in the standstill condition, a driveaway request or a vehicle driver is determined when defined conditions, which are to be met for driveaway of the motor vehicle, exist in the standstill condition. Once a driveaway request has been recognized, the operating state of the motor vehicle is checked until an operating condition required for driveaway exists. Once such an operating condition is reached, the braking equipment of the motor vehicle is controlled in such a way that its braking forces generated in the standstill condition are reduced to allow driveaway of the vehicle.

Method and system for assisting the driveaway of a motor vehicle

A method for controlling an electrically actuable parking brake is described. In this method the cutoff current of the electric motor is varied to compensate for example for changes in the application force associated with aging or wear or for changes in the application force due to changes in the resistance and/or temperature of an electric motor.

Parking brake and method for controlling the same

An electrically driven vehicle brake comprises a brake piston, which acts on at least one friction lining and can be displaced out of an initial position into an actuation position, in which the brake piston abuts the friction lining against a rotating member of the vehicle brake which is to be connected, fixed against rotation, to a wheel of the motor vehicle, and a transmission unit, driven by an electric motor and acting on the brake piston to actuate the brake piston, wherein the electric motor is to be triggered by an electronic control unit, which is also set up to detect performance parameters of the vehicle, the electric motor and/or the vehicle brake. The electronic control unit is set up and programmed to trigger the electric motor by means of a control and evaluation program running in it in such a way that the brake piston is displaced in response to the detecting of at least one predetermined operating condition in a first direction into its actuation position, in which the at least one friction lining abuts against the rotating member, and the brake piston is then displaced by a path corresponding to a predetermined, desired brake release play in a second direction opposite the first direction, into its initial position. If the vehicle brake additionally comprises a device for fixing the initial position of the brake piston, which fixes the initial position of the brake piston in such a way that a predetermined, desired brake release play is kept constant during the operating life of the brake, the electronic control unit is set up and programmed to trigger the electric motor by means of a control and evaluation program running in it in such a way that an element of the transmission unit acting on the brake piston on electrical actuation of the brake is displaced in response to the detecting of at least one predetermined operating condition in a first direction into its actuation position, in which the brake piston actuated by the element abuts the at least one friction lining against the rotating member. The element is then displaced by a path corresponding to a sum made up of the predetermined, desired brake release play and a predetermined, desired distance between the element and the brake piston when the brake is not actuated in a second direction opposite the first direction into its initial position.

Electrically actuatable vehicle brake and method for controlling an electrically actuatable vehicle brake

The invention provides a solution, which makes it possible to determine brake surface temperatures for a vehicle brake system in dependence upon decelerations or accelerations acting on a vehicle in an activated state of the vehicle brake system and to control the vehicle braking system in dependence upon the brake surface temperatures.

Operation of a vehicle brake system in dependence upon brake surface temperatures

The present invention relates to a method and a device for controlling braking equipment of a motor vehicle. Here, an operating state of a motor vehicle is determined, in which the motor vehicle is to be brought from a state, in which its speed is not zero, into a state, in which the vehicle no longer moves. If such a transition from a traveling state into a state of standstill is determined, braking equipment of the motor vehicle is controlled such that braking forces are produced, which are capable of bringing the motor vehicle into the state of standstill and/or assisting a vehicle driver in doing this. It is also possible to produce braking forces in the state of standstill, which are capable of holding the motor vehicle in the state of standstill. The present invention additionally enables to assist a vehicle driver when starting a motor vehicle. In this case, an operating state of the motor vehicle is detected in which the motor vehicle is to be brought from a state of standstill into a traveling state. If such an operating state is present, the braking equipment of the motor vehicle is controlled such that the braking forces produced by the braking equipment in the state of standstill are reduced in such a way as to allow a transition into the traveling state and/or to assist the vehicle driver in this respect.

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Eitelborn, Germany

Ralf Kinder