Robert Boschgmbh

Jens Wagner

Stefan Zahariev

Bertram Foitzik

Matthias Kistner

Klaus Winkler

Dirk Foerch

Eberhard Schnaibel

Lothar Diehl

Herbert Vollert

Andreas Roth

Dirk Hartmann

Andreas Kufferath

Daniel Frank

Otmar Bussmann

Alfred Strehle

Torsten Handler

Claudius Bevot

Andreas Koring

Andreas Krautter

Karsten Kroepke

Detlef Heinrich

Thomas Seiler

Thomas Wenzler

Goetz Reinhardt

Peter Kaltenbrunn

Timo Haible

Helge Schichlein

Matthias Kranich

Ralf Daeubel

Christian Michael Praetorius

Beate Rittmann

Christian Woerz

Bjoern Alexander Schuetz

Rainer Weigand

Oliver Marquardt

Verena Barske

Sujay Sirur

Holger Bellmannn

Nicholas Taubitz

Reid Collins

A braking system includes an actuating unit for specifying a braking intention, and multiple braking devices. A first braking device includes a wheel brake, onto which a drivable pressure generator is able to apply a pressure medium, which is under braking pressure, the pressure generator being contactable with a pressure medium reservoir via a supply line. A second braking device, for converting kinetic energy of the motor vehicle into electric energy, is equipped with a drivable electric machine. The two braking devices jointly contribute to the generation of the braking power of the braking system, the respective proportion of a braking device in the braking power being variable. A connection is established, through which pressure medium is able to flow, from the wheel brake to the pressure medium reservoir using an electronic control unit, when the second braking device is able to itself generate the braking power.

Method for controlling an electronic slip-controllable braking system for a motor vehicle

Wheel brakes of one vehicle axle of a dual-circuit hydraulic-power vehicle brake system for an electric or hybrid vehicle are connected to one brake circuit. Brake pressure is applied by a power brake-pressure generator to the two brake circuits with a time offset. It is thereby possible to compensate for a deceleration effect of an electric motor of the vehicle, which is operated as a generator during a braking.

Service brake application utilizing a multi-circuit hydraulic-power vehicle brake system

A method for controlling an electronically slip-controllable power braking system and a braking system. This power braking system has a brake circuit and a pressure generator including a plunger piston for applying a circuit pressure to the brake circuit. The plunger piston delimits a pressure chamber of the pressure generator and is drivable by an activatable drive unit into a forward or reverse movement. During its forward movement, pressure medium is displaced by the plunger piston out of the pressure chamber into the brake circuit, while during the reverse movement, pressure medium flows out of a reservoir of the power braking system via a flow path into the pressure chamber of the pressure generator. The speed of the reverse movement of the plunger piston is adapted by the electronic control unit so that cavitation at the pressure generator of the power braking system, is avoided or at least minimized.

Method for controlling an electronically slip-controllable power braking system and electronically slip-controllable power braking system

In a method for monitoring the operational reliability of a braking system in a vehicle. A brake pedal actuation is monitored via a brake light switch. An error signal is generated if the brake light switch generates a switch signal, without a braking intent of the driver being registered via a sensor signal of a sensor.

Method for monitoring the operational reliability of a braking system in a vehicle

A method for determining a start time for a recharging procedure for a plunger device of an electronically slip-controllable power brake system, and an electronically slip-controllable power brake system having a plunger device. Plunger devices have a plunger cylinder, a plunger piston, and a plunger working space and are operable by a drive motor. A recharging procedure of the plunger device is required from time to time. The start time for a recharging procedure of the plunger device is ascertained as a function of characteristic values that describe the driving state of a vehicle equipped with the power brake system, and/or the operating state of the plunger device when an actual position of the plunger piston lies within a specifiable working range of the plunger device.

Method for determining a start time for a recharging procedure for a plunger device of an electronically slip-controllable power brake system, and electronically slip-controllable power brake system having a plunger device

A method for operating a brake system. A brake request signal is generated, and a setpoint brake pressure required in an active circuit is ascertained. An actual brake pressure is set according to the setpoint brake pressure. A wheel brake actuated by the active circuit is hydraulically decoupled from the pressure generation device by closing an isolation valve, which is situated between the pressure generation device and the wheel brake, the isolation valve is preloaded to a closed state counter to an inflow direction of a volume flow into a brake-side section between the isolation valve and the wheel brake. A hydraulic recoupling of the wheel brake takes place by opening the isolation valve in that the actual brake pressure is set according to the setpoint brake pressure and an opening force is simultaneously applied to the isolation valve such that a compensation of a closing force takes place.

Method for operating a brake system, and brake system

A method for controlling an electronically slip-controllable power braking system of a motor vehicle. Power braking systems are equipped with a plunger unit, which includes a plunger piston accommodated in a plunger cylinder and delimiting a working chamber, for generating brake pressure in brake circuits. This plunger piston is actuatable by an electronically activatable drive in a pressure buildup direction or in the opposing spatial direction thereto in a pressure reducing direction. A time-limited drive of the plunger piston takes place in the pressure reducing direction as soon as an actual brake pressure generated by the plunger unit has reached a predefinable setpoint brake pressure and a decoupling of a wheel brake and the plunger unit from an associated brake circuit has taken place.

Method for controlling an electronically slip-controllable power braking system

A control device for a vehicle hydraulic braking system, including an electronic device for transferring brake fluid into at least one wheel brake cylinder without a force transmission connection to the brake actuating element, or that is hydraulically decoupleable from the brake actuating element, with a motorized brake pressure buildup device; ascertaining whether wheel locking of at least one wheel of the vehicle that is braked with the at least one wheel brake cylinder is present or at risk; temporarily effectuating, at least at times, a counterforce on the brake actuating element acting against the actuation of the brake actuating element by the driver when it is ascertained that wheel locking is present or at risk and/or when the electronic brake force distribution function and/or the antilocking function are/is executed. Also described is a hydraulic braking system for a vehicle, and a method for operating such a braking system.

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

A control device and a method for operating a hydraulic braking system of a vehicle, a volume supplementation in a motorized plunger device being effectuatable by moving a plunger of the motorized plunger device at a maximum movement speed by a maximum movement travel in a pressure reduction direction, at least one setpoint variable regarding the maximum movement speed and/or the maximum movement travel of the plunger during the subsequent volume supplementation being established, before the volume supplementation, with consideration of at least one provided variable regarding current driving situation information and/or surroundings information, and the motor of the motorized plunger device is activated during the subsequent volume supplementation with consideration of the at least one established setpoint variable.

Control device for at least one motorized plunger device and method for operating a hydraulic braking system of a vehicle

A power brake system having electronic slip regulation, and a method for controlling a power brake system having electronic slip regulation. A return line is equipped with a pressure medium storage unit for storing pressure medium with a pressure that is greater than an ambient atmospheric pressure, and is equipped with a blocking device that is controllable and that is situated between the pressure medium storage device and the reservoir. In addition, there is a pressure medium connection between the pressure medium storage unit and the plunger working space. A controlling of a power brake system takes place using the blocking device in such a way that the return line is blocked relative to the reservoir as soon as a plunger piston, driven by a drive unit, has traveled a definable path in the forward direction.

Power brake system having electronic slip regulation, and method for controlling a power brake system having electronic slip regulation

A method for diagnosing a sensor element for detecting at least one fraction of a gas component of a gas in a measuring gas chamber, in particular a sensor element for detecting oxygen in an exhaust gas of an internal combustion engine. The sensor element includes at least one first electrode, to which the gas may be applied, and at least one second electrode, the first electrode and the second electrode being connected via at least one solid electrolyte. A diagnostic signal is applied between the first electrode and the second electrode, a response signal being detected between the first electrode and the second electrode.

Method and device for diagnosing electrodes in sensor elements

A method for operating an exhaust gas probe, in particular a lambda probe, in the exhaust gas of an internal combustion engine, where at least one heating element for achieving the operating temperature in the exhaust gas probe and determination of the temperature of the exhaust gas probe is performed by measuring the internal resistance. Measurement of the internal resistance occurs by the superimposition of discrete bipolar test pulses that include a pulse and a counter pulse, and by acquisition of the Nernst voltage.

Method for operating a heatable exhaust gas probe

A method for heating up a catalytic converter in internal combustion engines having gasoline direct injection is presented and has the steps: shifting the ignition toward retard; checking whether the charge of the cylinders with air exceeds a pregiven threshold; and, dividing the fuel injection into two component quantities which are injected in advance of the ignition when the air charge exceeds the threshold.

Method for heating up a catalyst in combustion engines with direct fuel injection

The invention relates to a method for operating an internal combustion engine, especially for motor vehicles, the engine having a catalytic converter; in the method, for heating up the catalytic converter, there is a switchover between a homogeneous operating mode with a one-time injection of fuel into a combustion chamber of the engine and an operating mode with subdivided injection of fuel at at least two injection time points into the combustion chamber of the engine; wherein, for subdivided injections, both injection time points lie ahead of an ignition of an air/fuel mixture, the first injection time point essentially corresponds to the injection time point of the homogeneous operating mode during the switchover operation from the homogeneous operating mode to the operating mode with subdivided injection, and the second injection time point of the subdivided injection takes place at first so early that the mixture arising during operation with subdivided injection corresponds approximately to a homogeneous mixture and, after the completed switchover, the second injection time point is shifted toward late until a pregiven mixture preparation is present and, for a switchover from the operating mode with the subdivided injection to the homogeneous operating mode, the shift of the second injection time point takes place in the opposite direction. Furthermore, the invention relates to a computer program which is suitable to carry out the method when the method is carried out on a computer.

Method for operating an internal combustion engine especially for motor vehicles

A method for influencing the exhaust gas temperature of an internal combustion engine is described in which measures can be carried out for increasing, lowering and limiting exhaust gas temperature. Depending on temperature requirements, and in which method these temperature requirements are prioritized, the temperature limitation having the highest priority for ensuring protection of the component parts, the resulting temperature requirement may be achieved by heating measures or cooling measures in such a way that heating measures and cooling measures are not applied at the same time.

Growing community of inventors

Stuttgart, Germany

Jens Wagner