Continental Teves, Ag and Company Ohg

Robert Boschgmbh

Zf Friedrichshafen Ag

Bernd Ummer

Holger Esslinger

Thomas Kuzel

Reiner Marchthaler

Klaus-Peter Wagner

Gerhard Hermann Martin

Wilfrid Eberhard

Jürgen Kröber

Jürgen Krüber

Disclosed is a method for increasing the braking effect in a motor vehicle having a hydraulic brake system. An energy supply unit, which is used to increase the brake pressure in at least one wheel brake, is switched on when the brake pressure adjusted by the driver in a master brake cylinder exceeds a first activation threshold value, which is determined depending on a detected vehicle deceleration, and the energy supply unit is switched off when the brake pressure reaches a predetermined bottom threshold value at a specific instant. According to the method, within an interval beginning at that specific instant, it is checked whether the brake pressure (p) rises again using a comparison between the brake pressure and a second activation threshold (p) that is reduced compared to the first activation threshold (p) and/or using a comparison between a brake pressure gradient and a predetermined threshold value, and in that the energy supply unit is switched on again when a new rise of the brake pressure (p) has been detected. Also disclosed is a device that is suitable for implementing the method.

Method for supporting a brake system in case of reduced effectiveness of the vehicle brake system

A method of determining an applied actuation touch point pressure value of a frictionally engaged shift element of a transmission at which transmission, via the shift element, is approximately zero, and an increase in pressure relates to an increase of the power transmission via the shift element. The method includes supplying a predefined pressure to the shift element at which power transmission is zero. Increasing the target pressure by an offset pressure to transfer the shift element into a predefined operating state which initiates time monitoring. Determining a characteristic of the actual pressure. After a testing time, a monitoring period is compared with a reference period. When the monitoring period is less than or equal to the reference period, the applied pressure is set to be equivalent with the target pressure.

Determination method for actuation touch point pressure value of a friction shift element

Disclosed is a method for increasing the braking effect in a motor vehicle with a hydraulic brake system. In the method, in case of a reduced effectiveness of the brake system, a brake pressure in at least one wheel brake is increased by switching on an energy supply unit. A check is made whether a brake pressure (p) in a master brake cylinder () reaches a predetermined threshold value (p), and that the energy supply unit () is disabled upon expiry of a predetermined length of time (&#x394;t), which begins the instant it is detected that the brake pressure (p) has reached the predetermined threshold value (p). Also disclosed is a device that is appropriate to implement the method.

Method for supporting a brake system in case of reduced effectiveness

Disclosed is a method for increasing a braking effect in a motor vehicle with a hydraulic brake system. An energy supply unit, which is used to increase the brake pressure in at least one wheel brake, is switched on when the brake pressure adjusted by the driver in a master brake cylinder exceeds an activation threshold, which is determined depending on a detected vehicle deceleration. A check is made whether an unbraked trailer is coupled to the vehicle, and in that the activation threshold Pis raised, if the presence of an unbraked trailer that is coupled to the vehicle is detected.

A method is described for detecting moving and/or stationary objects in the path of a vehicle, where the distance and velocity of the reflecting object are determined by using a radar sensor, where the frequency of the signal transmitted is modulated in the shape of a ramp according to a multi-ramp method, and some ramps have a lower slope in the frequency curve. The higher spectral components of the mixed signals from the ramps having the lower slope, which are to be assigned to a distance range of the reflecting object which is greater than the distance range belonging to the ramps having the greater slope, are used to determine the distance, speed and angle of objects.

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Bodnegg, Germany

Bernd Ummer