Robert Boschgmbh

Helmut Wandel

Thomas Sauter

Jost Brachert

Norbert Polzin

Ulrich Hessmert

Christian Zimmermann

Oliver Lah

In a method for detecting the status of the clutch in the drive train of a motor vehicle, the engine speed and the speed are ascertained and a transmission ratio is formed as the quotient of the engine speed and speed. Furthermore, a reference value is determined, which is set equal to the transmission ratio from a first time step. In a subsequent time step, the difference between the instantaneous transmission ratio and the reference value is formed, a disengaged clutch status being detected if the difference exceeds a threshold value.

Method for detecting the status of the clutch in the drive train of a motor vehicle

A method of regulating at least one variable characterizing the vehicle dynamics,

Method and device for regulating at least one vehicle dynamics variable

A vehicle traction control system having capabilities for braking intervention and coefficient of friction detection is provided, a slipping wheel being braked by braking intervention if a slip threshold is exceeded. In order to improve the lateral stability of the vehicle when cornering on road surfaces having a low coefficient of friction, the slip threshold for the drive wheel on the outside of the curve is reduced independently of that of the drive wheel on the inside of the curve and is set to a lower value than that for the wheel on the inside of the curve.

Traction control system including individual slip threshold reduction of the drive wheel on the outside of the curve

A method and device for driving a pump of a brake system, in which a pump motor achieves full drive for a particular time following a braking request from the brake system. During the subsequent clocked driving action, a drive signal is subjected to a pulse width modulation based on a direct comparison between a motor voltage and a voltage threshold value. Due to a subsequent comparison between the motor voltage and a safety threshold, and the resulting full drive for the particular time, an increased load on the pump causes the pump to produce the necessary delivery capacity. In addition, a selectable maximum off-time of the pump motor guarantees a minimum pump on-time per drive cycle. The pump can be made to achieve full drive prematurely as a function of certain conditions which can be subjected to a preventive check, thereby avoiding an excessively high load. It is also possible to coordinate the way in which different control strategies access the pump.

Method and device for controlling a pump of a brake system

A method and an apparatus for an anti-spin regulation (ASR) for a vehicle are described. The method is characterized in that a slipping driven wheel ( ) is braked by braking means ( ). A further driven wheel ( ) is monitored by monitoring means, ( ). The further driven wheel ( ) is braked by braking means ( ) in case a slipping trend is determined by determination means ( ) for said further driven wheel ( ). The apparatus is in particular eligible for use with the inventive method and is characterized in that braking means ( ) are implemented for braking a slipping driven wheel ( ). Monitoring means ( ) are implemented for monitoring a further driven wheel ( ). Braking means ( ) are implemented for braking the further driven wheel ( ) in case a slipping trend is determined by further implemented determination means ( ) for said further driven wheel ( ).

Method and apparatus for an anti-spin regulation (ASR) for a vehicle

A system for determining the height of the center of gravity of a vehicle includes an arrangement configured to determine a difference between wheel contact forces, an arrangement configured to determine a transverse acceleration, an arrangement configured to determine comparison values which compares the change in the difference between wheel contact forces with the change in the transverse acceleration, and an arrangement configured to evaluate a roll model which determines the height of the center of gravity from the comparison values. Furthermore, a corresponding method is for determining the height of the center of gravity of a vehicle.

System and method for determining the height of the center of gravity of a vehicle

The present invention relates to a method and device for driving a brake system pump motor, which has the advantage of simultaneously allowing prioritized, individual braking strategies, using the present invention as a subsystem for intelligently driving the pump motor. The invention provides the additional advantage of reducing pump motor current requirements, allowing the use of a reduced size of pump motor. The invention provides for a predetermined period of full-on voltage at the initiation of a braking request, subsequent periods of variable pump motor voltage on-time, depending on pulse width modulation of a drive motor signal based on a comparison between the motor voltage and a threshold voltage, and subsequent periods of full-on voltage for a predetermined period based on a comparison between the motor voltage and a safety threshold voltage.

A device and method for determining values and/or generating signals, which can be used for closed-loop or open-loop controlling of the driving behavior of a vehicle equipped with a sensor system that detects wheel contact forces, includes determining the vehicle mass via the wheel contact forces that are detected, and further includes at least one of determining shifts in the wheel contact forces, and determining the required drive torque.

Determination of road gradient and determination of trailer load

A method and a system for limiting an engine torque of vehicles to a maximum value. In the method, signals representing wheel torques from wheel sensors at the drive train are acquired, the wheel torques, differentiated according to driving situations which can have a harmful influence on the transmission, differential or torque converter, then being checked for a wheel-torque value which is too high. If too high a value is found, the engine torque is limited or reduced.

Method and system for limiting the engine torque of vehicles

An arrangement for determining the temperature of valves in the brake circuit of a vehicle is described. The arrangement includes an arrangement to measure a longitudinal wheel force, an arrangement to determine a wheel braking pressure using the measured longitudinal wheel force, an arrangement to determine a pressure drop across a valve using the wheel braking pressure, an arrangement to determine a valve solenoid current using the pressure drop, an arrangement to determine the resistance of the valve solenoid from the valve solenoid current and an applied valve solenoid voltage, and an arrangement to determine the valve solenoid temperature using the temperature-dependence of the valve solenoid resistance. Moreover, a method for determining the temperature of valves in the brake circuit of a vehicle is provided.

Arrangement and method for determining the temperature of valves

A movement of a vehicle is detected, using tire sensors, by evaluating detected, measured signals in an evaluating unit in such a manner, that the polarity of the measured signals, starting from the measured signals at vehicle standstill, is used as an indicator of the vehicle moving direction.

Method and system for controlling the handling of a vehicle in response to a movement

A method and a system for operating a brake system of a motor vehicle having traction control are described. The brake system contains sensors which are assigned to the individual vehicle wheels and with which a quantity representing at least the driving and/or braking forces acting between the road surface and the vehicle wheel is detected for the respective vehicle wheel. For operation of the brake system having traction control, pressure quantities which describe the brake pressure established for the respective vehicle wheel are analyzed. The pressure quantities are determined as a function of the quantities detected by the sensors.

Method and system for operating a brake system of a motor vehicle having traction control

The present invention relates to a method and device for driving a brake system pump motor, which has the advantage of simultaneously allowing prioritized, individual braking strategies, using the present invention as a subsystem for intelligently driving the pump motor. The invention provides the additional advantage of reducing pump motor current requirements, allowing the use of a reduced size of pump motor. The invention provides for a predetermined period of full-on voltage at the initiation of a braking request, subsequent periods of variable pump motor voltage on-time, depending on pulse width modulation of a drive motor signal based on a comparison between the motor voltage and a threshold voltage, and subsequent periods of full-on voltage for a predetermined period based on a comparison between the motor voltage and a safety threshold voltage. The invention also provides for minimum on-time per clock cycle for safe braking operations.

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Markgroeningen, Germany

Helmut Wandel