Lucas Automotive Gmbh

Lucas Industries Public Limited Company

Kelsey-hayes Company

Hl Mando Corporation

Zf Active Safety Gmbh

Lucas Armstrong Gmbh

Josef Knechtges

Carsten Knechtges

Frank Heller

Thomas Bach

Frank Einig

Helmut Heibel

Benedikt Ohlig

Wilfried T Giering

Leo Gilles

Andreas Marx

Thomas Baron

Andreas Passmann

Michael Schwarz

Karl-Heinz Schaust

Klaus Ullmer

Christian Chemnitz

Niko Naether

Stefan Grieser-Schmitz

Arnold H Spieker

Hubert E Schmitt

Josko Kurbasa

Elmar Hoffmann

Nicholas Alford

Michael Schog

Harald Thelen

Michael Bleser

Kenneth A Doll

Thomas Wagner

Bernd Schmitt

Werner Seibert

Markus Necknig

Stefan Helbing

Axel Kunkel

Ralf Raffauf

Steven Keen

Thorsten Valder

Thorsten Sopp

Jan Grundmann

The present disclosure relates to a wheel speed sensor system (), comprising: one or more first wheel speed sensors (), a first application specific integrated circuit (ASIC) () configured to receive one or more first wheel speed signals from the one or more first wheel speed sensors () and to convert the one or more first wheel speed signals to first wheel speed data, and a first electronic control unit (ECU) () configured to receive the first wheel speed data from the first ASIC () via a data link () between the first ECU () and the first ASIC (); and one or more second wheel speed sensors (), a second ASIC () configured to receive one or more second wheel speed signals from the one or more second wheel speed sensors () and to convert the one or more second wheel speed signals to second wheel speed data, and a second ECU () configured to receive the second wheel speed data from the second ASIC () via a data link () between the second ECU () and the second ASIC (). The first ECU () is further configured to receive the second wheel speed data from the second ASIC () via a data link () between the first ECU () and the second ASIC (), and the second ECU () is further configured to receive the first wheel speed data from the first ASIC () via a data link () between the second ECU () and the first ASIC (). The present disclosure further relates to a vehicle including said wheel speed sensor system and to a method of processing wheel speed signals.

Wheel speed sensor system, vehicle including said wheel speed sensor system and method of processing wheel speed signals

The present invention relates to an electrohydraulic braking-force generation device and to a method for operating an electrohydraulic braking-force generation device. The electrohydraulic braking-force generation device comprises: a power transmission assembly that is coupled to a brake pedal; a brake cylinder assembly that is to be actuated by the power transmission assembly, the brake cylinder assembly having a first cylinder-piston assembly and said first cylinder-piston assembly being designed to be fluidically coupled to at least one brake circuit; and a brake booster assembly comprising a second cylinder-piston assembly and at least one electromechanical actuator. The brake booster assembly is configured to apply hydraulic pressure to the brake cylinder assembly in order to boost the braking power and the power transmission assembly is configured to actuate the brake cylinder assembly, in each operating mode of the braking-force generation device, by means of a relative movement.

Electrohydraulic braking-force generation device for an electrohydraulic motor vehicle braking system

A hydraulic brake system for a land vehicle includes a brake pedal; a wheel brake; and a master brake cylinder connected to the brake pedal by a brake booster and a pump. The outlet of the pump is connected to the wheel brake by a supply line and the inlet is connected to the wheel brake by a return line. The pump moves hydraulic fluid to the wheel brake. A temporary store is connected to the inlet of the pump and the wheel brake by the return line. A pressure reduction valve, arranged in the return line of the wheel brake, has a throttling effect in the open state. A control unit compensates for the difference between a total braking torque specified by the brake pedal and a generating braking torque provided by an electric machine by setting the hydraulic braking torque during a regenerative braking process of the vehicle.

Brake system for a land vehicle and method for controlling the brake system

The invention relates to an electrohydraulic motor vehicle braking system and to a method for operating an electrohydraulic motor vehicle braking system. Said electrohydraulic braking system comprises a first brake circuit with at least one wheel brake, a second brake circuit with at least one wheel brake, a first cylinder-piston assembly being designed to be fluidically coupled to at least one of the first or second brake circuits and which is used to produce hydraulic pressure in at least one of the first or second brake circuits; the first cylinder-piston assembly comprises at least one first piston, a second piston-cylinder assembly comprises at least one second piston, and a electromechanical actuator which acts on the second piston of the second cylinder-piston assembly; the second cylinder-piston assembly is designed to be fluidically coupled to the first cylinder-piston assembly in order to provide hydraulic pressure for actuating the first piston-cylinder assembly and generated in the second piston-cylinder assembly when actuating the electromechanical actuator; and the second piston-cylinder assembly is designed to be fluidically coupled to the first brake circuit and/or to the second brake circuit such that when actuating the electromechanical actuator in the second piston-cylinder assembly, the first and/or the second brake circuit can be impinged upon with hydraulic pressure generated in the second piston-cylinder assembly.

Electrohydraulic motor vehicle braking system

An electrohydraulic vehicle brake system includes an electromechanical actuator for actuating at least one hydraulic piston to build hydraulic pressure at wheel brakes. The brake system provides a set of electrically activatable valve arrangements having a first valve arrangement between a cylinder accommodating the at least one hydraulic piston and each of the wheel brakes, and at least one second valve arrangement between a receptacle device for hydraulic fluid and at least one of the wheel brakes. The second valve arrangement is provided in parallel with the first valve arrangement which is associated with the same wheel brake as the second valve arrangement. A control device or system activates the first valve arrangements and the electromechanical actuator, in order to build up a hydraulic pressure at at least one of the wheel brakes and via the opened first valve arrangement associated with that wheel brake and to reduce a built-up hydraulic pressure via the opened first valve arrangement. The activation of the first valve arrangements can take place in a time multiplex operation.

Electrohydraulic vehicle brake system having an electromechanical actuator and method for operating the brake system

A hydraulic brake system for a land vehicle including a hydraulic connection between a master cylinder and wheel brakes that is established or blocked by valve arrangements in dependence upon trigger signals from an electronic control with the electronic control unit devised and programmed in such a way that, in order to set a brake pressure characteristic required for a specific vehicle behavior, the electronic control unit supplies trigger signals through which the setting of a respective brake pressure characteristic in two brake circuits in predefined pressure stages (delta-p) is staggered in terms of time by a substantially predefined time stage (delta-t).

Hydraulic braking system for a land craft

An electro-hydraulic motor vehicle brake system is provided, having a first cylinder-piston device, which can be fluidically coupled to at least one wheel brake of the brake system, for generating hydraulic pressure on the at least one wheel brake, wherein the first cylinder-piston device comprises at least one first piston. The brake system further has a second cylinder-piston device, which comprises at least one second piston, and an electromechanical actuator which acts on the second piston of the second cylinder-piston device. The second cylinder-piston device is or can be fluidically coupled at the output side to the first piston of the first cylinder-piston device in order to provide a hydraulic pressure, which is generated in the second cylinder-piston device upon actuation of the electromechanical actuator, for actuating the at least one first piston of the first cylinder-piston device.

Electro-hydraulic motor vehicle brake system and method for the operation thereof

The invention relates to a technique for operating an electrohydraulic motor vehicle brake system comprising a master cylinder (or any other cylinder-piston arrangement) that can be supplied with a hydraulic fluid from a reservoir, an electromechanical actuator for actuating a piston accommodated in the master cylinder, a wheel brake that can be coupled to the master cylinder, and a stop valve provided between the master cylinder and the wheel brake. According to an aspect of this technique, the method comprises the steps of: controlling the electromechanical actuator to build up hydraulic pressure on the wheel brake; controlling the stop valve to hold the hydraulic pressure already built up on the wheel brake; controlling the electromechanical actuator to take in hydraulic fluid from the reservoir while monitoring a time response of a pressure drop in the master cylinder associated with the take-in; and interrupting the take-in depending on a result of the monitoring.

Electrohydraulic motor vehicle brake system and method for operating the same

The invention relates to a technique for boosting the brake force of an electrohydraulic motor vehicle brake system in a mode in which, as a result of a mechanical push-through, an actuating force onto a brake pedal acts upon a master cylinder of the brake system. According to an aspect of this technique, the method comprises the steps of: determining a value of a first variable indicating a current deceleration of the vehicle; determining, based on the first variable, a value of a second variable indicating the actuating force; determining, based on the second variable, a required brake boost; and controlling an electromechanical actuator acting upon the master brake cylinder to obtain the required brake boost.

Method and assembly for boosting the brake force of an electrohydraulic motor vehicle brake system

An electrohydraulic brake system includes an electromechanical actuator for actuating at least one hydraulic piston to provide a hydraulic pressure at one or more of a plurality of wheel brakes. The brake system further includes electrically activatable valve arrangements having a first valve arrangement between a cylinder accommodating the at least one hydraulic piston and each of the plurality of wheel brakes, and at least one second valve arrangement. The second valve arrangement is provided between a receptacle device for hydraulic fluid and at least one of the wheel brakes. The second valve arrangement is provided in parallel with the first valve arrangement associated with the same wheel brake as the second valve arrangement. The brake system also includes a control device or system that opens one of the first valve arrangements and the second valve arrangement connected in parallel therewith, in order to release a hydraulic pressure built up in the cylinder.

The invention relates to a technique for operating an electrohydraulic motor vehicle brake system comprising a master cylinder, an electromechanical actuator for generating a hydraulic pressure at a plurality of wheel brakes and a set of electrically actuable valve arrangements. The set of valve arrangements comprises a first valve arrangement between the master cylinder and every wheel brake. The first valve arrangements can be controlled in the multiplex operation to generate, by means of the electromechanical actuator, the respective brake pressure intended for each of the wheel brakes. According to an aspect of this technique, the method comprises the steps of: generating a feedback current during the multiplex operation by operating an electric motor of the electromechanical actuator as a generator and supplying the feedback current to at least one electrical load.

The invention relates to a technique for operating a regenerative electrohydraulic motor vehicle brake system comprising a master cylinder that can be supplied with a hydraulic fluid from a reservoir, an electromechanical actuator for actuating a piston accommodated in the master cylinder and a stop valve provided between the master cylinder and the reservoir. According to an aspect of this technique, the method comprises the step of controlling the electromechanical actuator when the stop valve is closed to generate a hydraulic pressure on a wheel brake that is fluidically connected to the master cylinder. The method further comprises the step of activating a regenerative brake operation and of controlling the stop valve to open, the master cylinder remaining fluidically connected to the wheel brake and the electromechanical actuator being controlled to maintain the hydraulic pressure on the wheel brake at least to some extent.

A technique for determining an actuating force applied to a vehicle brake is described, wherein the vehicle brake is equipped with an electromechanical brake actuator, and wherein a first actuating-force component is generated mechanically by actuating the electromechanical brake actuator and a second actuating-force component is generated hydraulically by actuating a hydraulic pressure source. A method aspect comprises the steps of detecting a first parameter relative to the electromechanical brake actuator and indicating the first actuating-force component, determining a second parameter indicating the second actuating-force component from a progression of the detected first parameter, and determining the actuating force applied to the vehicle brake from the first and the second parameters.

Technique for determining an actuating force applied to a vehicle brake that can be actuated hydraulically and mechanically

A sensor assembly for use with a master cylinder is described. The master cylinder comprises an input-side activation element to which a signal transmitter element is coupled. The sensor module comprises a travel sensor for sensing travel carried out by the activation element, and a position sensor for sensing when a predefined position of the activation element is reached.

Sensor module for a master cylinder

Proposed is a technique for operating a hydraulic motor vehicle brake system in an operating situation which requires the formation of a hydraulic pressure difference at opposite wheel brakes of a vehicle axle. Here, each wheel brake is assigned a first slip regulating valve device for decoupling the respective wheel brake from a hydraulic pressure generator, and a second slip regulating valve device for dissipating hydraulic pressure at the respective wheel brake. A method implementation of this technique comprises the steps of building up a hydraulic pressure at the opposite wheel brakes during the course of a braking process, detecting a requirement for forming a hydraulic pressure difference at the opposite wheel brakes, actuating one or more of the slip regulating valve devices assigned to the opposite wheel brakes so as to form the hydraulic pressure difference by virtue of different hydraulic pressures being set at the opposite wheel brakes, and, in reaction to a driver demand, increasing the hydraulic pressure at the opposite wheel brakes, including the wheel brake at which a relatively low hydraulic pressure is to be set, while maintaining the hydraulic pressure difference by transferring hydraulic fluid from the hydraulic pressure generator via the first slip regulating valve devices to the opposite wheel brakes.

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Mayen, Germany

Josef Knechtges