Robert Boschgmbh

Stefan Strengert

Michael Kunz

Dirk Drotleff

Herbert Vollert

Karl-Heinz Willmann

Werner Harter

Jens Kolarsky

Thorsten Maucher

Jochen Bodmann

Jochen Feinauer

Reinhard Weiberle

Thomas Friedrich

Dirk Hofmann

Matthias Kistner

Matthias Schanzenbach

Peter Blessing

Werner Quirant

Timo Jahnz

Urs Bauer

Heiko Druckenmueller

Ralf Kleemann

Oliver Leibfried

Yasutaka Nagakura

Xun Yao

Steffen Benzler

Dagobert Masur

Volkmar Schlotter

Ralf-Peter Jaime

Niccolo Haegele

Suekrue Senol

Tobias Leng

Gottfried Bauer

Michael Kotitschke

A multi-circuit hydraulically closed braking system includes at least two wheel brakes, which are each associated with a braking circuit, two multi-circuit pressure generators, which are connected hydraulically in series between a fluid container and the at least two wheel brakes, and a hydraulic unit for hydraulic connection of the pressure generators to the at least two wheel brakes and for individual brake pressure modulation in the at least two wheel brakes. A first pressure generator is configured as a plunger system and is associated with a primary system which comprises a first power supply and a first evaluation and control unit for controlling the first pressure generator. A second pressure generator is configured as a pump system and is associated with a secondary system, which comprises a second power supply, independent of the first power supply, and a second evaluation and control unit.

Multi-circuit hydraulically closed braking system

A braking system is described for a vehicle, including a master brake cylinder, a first brake circuit with a first storage chamber, a first wheel brake cylinder, and a second wheel brake cylinder, the first wheel brake cylinder being hydraulically connected to the first storage chamber via a first wheel outlet valve, and the second wheel brake cylinder being hydraulically connected to the first storage chamber via a second wheel outlet valve, and including a second brake circuit with a second storage chamber, a third wheel brake cylinder, and a fourth wheel brake cylinder, the third wheel brake cylinder being hydraulically connected to the second storage chamber via a third wheel outlet valve, and the fourth wheel brake cylinder being hydraulically connected to the second storage chamber via a fourth wheel outlet valve. The first wheel outlet valve and the third wheel outlet valve are in each case continuously adjustable valves. Moreover, also described is a method for operating a braking system of a vehicle.

Braking system for a vehicle and methods for operating a braking system of a vehicle

A control device for a brake system of a vehicle includes an electronic device configured to perform a method including determining, taking into account a specified braking of a driver of the vehicle or of an automatic control system of the vehicle, a first item of information regarding a current usability of a hydraulic device of the brake system and a second item of information regarding a current usability of a brake booster of the brake system, which first target portion of a brake pressure increase is to be provided by the hydraulic device, and which second target portion of the brake pressure increase is to be provided by the brake booster, and controlling the hydraulic device and/or the brake booster so that the first target portion of the brake pressure increase is provided by the hydraulic device and the second target portion is provided by the brake booster.

Control device and method for operating a brake system of a vehicle

A braking system for a vehicle includes: a front axle wheel brake cylinder; a rear axle wheel brake cylinder; and a control electronics system for controlling a first brake pressure in the front axle wheel brake cylinder and/or a second brake pressure in the rear axle wheel brake cylinder. A limiting value z-critical is defined for the braking system, which specifies a maximum braking action, at which a traction stress on the front axle of the vehicle and a traction stress on the rear axle of the vehicle are equal. The braking system is mechanically configured for a z-critical of at least 0.7 g, and the braking system is controlled by the control electronics system during operation using a z-critical value of at most 0.7 g.

Braking system for a vehicle, method for operating a braking system of a vehicle, and manufacturing method for a braking system for a vehicle

The present invention relates to a braking device and to a braking system, each having a master brake cylinder () having at least one first pressure chamber () that is subdivided or is able to be subdivided at least into a first partial volume () and a second partial volume (), which are hydraulically connectable or connected to a brake fluid reservoir (), a first brake circuit () being hydraulically connectable or connected to the first partial volume (), and having a valve device () that is mechanically designed in such a way that a pressure buildup up to a mechanically specified limit pressure may be brought about in the second partial volume (), brake fluid being transferable at least into the first brake circuit () via at least one subcomponent () of the valve device (), and an exceeding of the limit pressure in the second partial volume () being prevented.

Braking device for a braking system of a vehicle and braking system for a vehicle

A method for blending a generator braking torque of a generator of a recuperative brake system having two brake circuits, including: controlling one of the at least two brake circuits of the brake system in a blending mode, a hydraulic connection between a master brake cylinder of the brake system and a storage volume of the brake circuit controlled in the blending mode being at least temporarily enabled, so that brake fluid is transferred from the master brake cylinder into the storage volume of the brake circuit controlled in the blending mode; and controlling another of the at least two brake circuits in a non-blending mode, a hydraulic connection between the master brake cylinder and a storage volume of the brake circuit controlled in the non-blending mode being interrupted during the non-blending mode. Also described is a control device for a recuperative brake system having two brake circuits.

Method for blending a generator braking torque of a generator of a recuperative brake system having two brake circuits, and a control device for a recuperative brake system having two brake circuits

A method for operating a regenerative braking system of a vehicle includes: applying control to at least one valve of a brake circuit, before and/or during operation of a generator of the braking system, so that brake fluid is displaced out of a brake master cylinder and/or out of the at least one brake circuit into at least one reservoir volume; defining a target force difference variable regarding a booster force exerted by a brake booster in consideration of at least one of a generator braking torque information item, a brake master cylinder pressure variable, and an evaluation variable derived from at least the generator braking torque information item or the brake master cylinder pressure variable; and controlling the brake booster in consideration of the defined target force difference variable.

Method for operating a regenerative brake system of a vehicle, control device for a regenerative brake system of a vehicle, and regenerative brake system

A control device is provided for a hydraulic braking system of a vehicle, including an actuating device which is designed for outputting, at least temporarily, at least one first control signal and at least one second control signal in at least a first operating mode, taking into account at least one sensor signal. A known hydraulic braking system may be controlled with the aid of the control signals, output by the actuating device, in such a way that during an activation of a brake actuating element, at least one blending valve of a first brake circuit which is connected to the master brake cylinder via a first changeover valve is controlled into an at least partially open state in such a way that brake fluid is displaceable into at least one storage chamber.

Control device for a hydraulic braking system of a vehicle, hydraulic braking system for a vehicle, and method for operating a hydraulic braking system of a vehicle

In a method for operating a braking system of a vehicle by limiting brake pressure buildup during an activation of a brake actuating element, the rear wheel outlet valves of the rear wheel brake cylinders, which are respectively associated with a rear wheel of the vehicle, are controlled, at least temporarily, into an open state during the activation of the brake actuating element, and the front wheel inlet valves of the front wheel brake cylinders, which are respectively associated with a front wheel of the vehicle, are controlled, at least temporarily, into a closed state during the control of the rear wheel outlet valves into the open state.

Method for operating a braking system of a vehicle, and control device for a braking system of a vehicle

A method for operating a braking system includes: limiting a brake pressure buildup in a brake circuit of the braking system to a response pressure of a storage volume of the brake circuit by controlling a first wheel outlet valve of a first wheel brake cylinder of the brake circuit into an opened state at least temporarily during an increasing activation intensity of an activation of a brake actuating element connected to a master break cylinder; providing an additional reduction of a brake pressure in the brake circuit to below the response pressure during a constant activation intensity by controlling the first wheel outlet valve into a closed state; and activating a brake booster in such a way that an internal pressure present in the master brake cylinder is reduced with the aid of the activated brake booster.

A method for checking an isolation valve of a braking system of a vehicle includes the steps of: operating at least one pump of a brake circuit of the braking system which is hydraulically connected via the isolation valve to a brake master cylinder of the braking system for a predefined pump running time; measuring at least one value regarding a pressure present in the brake circuit; and determining, in consideration of the at least one measured value, whether the isolation valve is mechanically blocked.

Method for checking an isolation valve and monitoring device for an isolation valve

A control device for a recuperative braking system of a vehicle includes: an actuating device configured to (i) select the maximum value of a front axle generator braking torque and of a rear axle generator braking torque, taking into account at least one provided default variable concerning a setpoint total braking torque which is predefined by a driver, (ii) control an electric motor, and (iii) control a hydraulic front axle brake circuit component and a hydraulic rear axle brake circuit component in such a way that a front axle brake pressure and a rear axle brake pressure are settable in such a way that a difference between a predefined setpoint braking torque distribution and an actual braking torque distribution present between the front axle and the rear axle is minimized.

Control unit for a recuperative brake system of a vehicle and method for braking a vehicle

A method for dimensioning a component of a braking system; the braking system having at least two brake-circuit partial circuits; each brake-circuit partial circuit having at least one pump element for building up a brake-circuit pressure and/or for returning brake-circuit fluid in an ABS case, the pump elements of the at least two brake-circuit partial circuits being operable using a motor element; and the at least two brake-circuit partial circuits being separable using a separating element, so that different brake-circuit pressures may be created in the at least two brake-circuit partial circuits.

Braking system and method for dimensioning a braking system

A control device for a vehicle regenerative braking system, having an engine control device, with which a setpoint engine braking torque variable for a setpoint engine braking torque to be imparted by an electric motor, useable in generator mode, is defineable, considering a setpoint overall braking torque variable for a predefined setpoint overall braking torque, and considering an actual friction braking torque variable for an imparted/impartable actual friction braking torque of at least one additional friction brake, wherein if the setpoint variable is below a threshold, the setpoint variable is defineable according to a difference between the setpoint overall braking torque to be imparted and the imparted/impartable braking torque, and if the setpoint variable is above the threshold, the setpoint variable is defineable according to a sum of a predefined additional braking torque and the difference. Also described are a regenerative braking system and method.

Control device for a regenerative braking system of a vehicle, and method for operating a regenerative braking system of a vehicle

A control device for a brake system of a vehicle includes a valve control device, using which, while taking into account a provided information signal with respect to a currently exerted or to be exerted generator braking torque of a generator, at least one high-pressure switching valve of a brake circuit of the brake system is able to be controlled into an at least partially opened state such that a brake fluid volume is able to be displaced from a main brake cylinder of the brake system into a storage chamber of the brake circuit via the at least one high-pressure switching valve that has been controlled into the at least partially opened state. Furthermore, a method for operating a brake system of a vehicle is described.

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Stuttgart, Germany

Stefan Strengert