Bayerische Motoren Werke Aktiengesellschaft

Muhr Und Bender Kg

Serge Vos

Roland Schmidt

Markus Wimmer

Marcus Jautze

Gerhard Zeller

Holger Klein

Daniel Schröder

Thomas Schrüllkamp

Wolfgang Zimprich

Andreas Gersmeier

A stabilizer assembly for a two-track vehicle comprises: a first and a second stabilizer section; a spring element between the stabilizer sections; a hydraulic actuator having an actuator outer part and an actuator inner part, each of which is non-rotatably connected to one of the stabilizer sections, and an intermediate element connected to the actuator outer part and actuator inner part respectively via outer and inner engagement means, wherein one of the engagement means has a pitch component in the axial direction and the other runs parallel to the longitudinal axis, so that a relative rotational movement of the actuator parts is converted into an axial movement of the intermediate element, wherein the intermediate element pressurises a first and second hydraulic chamber respectively; the hydraulic chambers being hydraulically connected to one another with interposition of a control element.

Stabilizer assembly with actuator for a two-track vehicle

A vehicle wheel suspension has a hydraulic adjustment system for the base of a support spring provided between a wheel-guide component and the vehicle structure. The suspension includes a piston pump which is driven via a relative movement of the vehicle structure in relation to a wheel-guiding component and intended for conveying hydraulic medium through a return valve into a hydraulic chamber provided at the spring base, as well as a pressurized compensation volume for providing hydraulic medium. Preferably, the piston pump has a pump cylinder and a pump piston guided such that it can move relative to the former and a return channel connected to the hydraulic chamber feeds into the pump cylinder in such a way that the feed opening is blocked or released by the pump piston in a position-dependent manner, wherein hydraulic medium can flow via the released feed opening, out of the hydraulic chamber, through the pump cylinder and into the compensation volume.

Vehicle wheel suspension having an adjustment system for the base of a structure support spring

A vehicle wheel suspension is provided having a hydraulic vibration damper, which is connected in parallel to a suspension spring which proportionally supports the vehicle body. A rebound spring is provided, which preferably and typically becomes effective in the event of larger spring deflection distances. The support point of the rebound spring is displaceable in relation to the damper housing by way of a spring support piston, which is provided therein and is displaceable by fluid externally supplied with pressure via pump. In this case, the pump is connected to a pressure accumulator for the fluid and delivers fluid out of the pressure accumulator into the damper housing or out of the damper housing back into the pressure accumulator. The absolute value of the spring constant of the pressure accumulator is at least in the order of magnitude of the spring constant of the associated suspension spring or springs, or is greater.

Vehicle wheel suspension with a hydraulic vibration damper

In a method and apparatus for detecting shock absorber damage, features of a shock absorber are determined by analyzing a signal of an antilock braking system rotational wheel speed sensor.

Process and apparatus for detecting damper damage

A process and device for monitoring the state of a wheel of a motor vehicle in which an output signal of a sensor is converted into an essentially rectangular pulse signal. A respective duration of the pulse is measured; and an especially weighted average between the duration of a current value and a preceding value is determined, wherein a current value and a preceding value exhibit a time interval and/or lie a specific step size apart. A correction factor is determined from each deviation between the duration of a current value and a respective mean value. A step size of the correction method is matched to an error order of a fault. Preferably the step size with a periodic deviation of the morder that is to be eliminated is determined according to the formula j=1/m&#xd7;n/4; for motor vehicles in particular according to the formula j=1/m&#xd7;12.

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Munich, Germany

Serge Vos