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AssigneeVolkswagen Aktiengesellschaft
InventorsPatricio van Cayzeele, Martin Fischer, Norbert Fischer
Estimating the term…
In a method and a device of a motor vehicle, including regulating units for adjusting the level position of a motor vehicle, at least one control unit for activating the regulating units, at least one sensor mechanism for recording the actual level position of the motor vehicle and a device for setting a setpoint level position of the motor vehicle, the actual level position being adapted to the actual speed of the motor vehicle regarding driving dynamics, whereby a set setpoint level position is able to be fixed, a limiting speed Vlimit regarding driving dynamics is able to be assigned to the setpoint level position, and this limiting speed is not able to be exceeded.
A device for ride height control of a motor vehicle, comprising:
A device for ride height control of a motor vehicle, comprising:
A device for ride height control of a motor vehicle, comprising:
A method for ride height control of a motor vehicle in accordance with regulating units configured to adjust a level position of the motor vehicle, at least one control unit configured to activate the regulating units, at least one sensor mechanism configured to record an actual level position of the motor vehicle and a device configured to set a setpoint level position of the motor vehicle, comprising:
A method for ride height control of a motor vehicle in accordance with regulating units configured to adjust a level position of the motor vehicle and compensate for level differences caused by riding surface unevenness, at least one control unit configured to activate the regulating units, at least one sensor mechanism configured to record an actual level position of the motor vehicle and a device configured to set a setpoint level position of the motor vehicle, comprising:
A device for ride height control of a motor vehicle, comprising:
A method for ride height control of a motor vehicle, comprising:
Dependencies are inferred from the claim text.
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Characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input: mainly during…
The regulating means comprising electric or electronic elements: characterised by the regulation being combined with other vehicle control systems
Speed: vehicle speed
Stroke; Height; Displacement: vertical
Term ended 6 Jan 2023 (estimated)
The present application claims priority from Application No. 101 62 172.8, filed in the Federal Republic of Germany on Dec. 13, 2001.
The present invention relates to a method and a device for ride height control of a motor vehicle.
Modern motor vehicles, and particularly off-highway vehicles, are designed using automatic ride height controls, so as, for instance, to compensate for level differences caused by street or terrain unevenness. To do this, the ride height control includes regulating units, for adapting the level position of a motor vehicle, which, for example, are designed as air springs and are driven by a compressor. In addition, the ride height control includes inclination and/or distance sensors for recording the distance to the roadway foundation. The data of this sensor technology are evaluated by a control unit, and the compressor is driven such that it activates the air springs so that a level position set as the setpoint value is adjusted to. At higher level positions the problem arises that the center of gravity of the motor vehicle is shifted upwards. At higher motor vehicle speeds, this in turn leads to a stability problem, so that there is the danger of rollover of the motor vehicle. To avoid this problem, the automatic ride height control records the motor vehicle speed, and when a boundary speed is exceeded, it automatically adjusts to a lower level, in order to achieve again a sufficient stability.
FIG. 1 is a schematic block diagram of a device for automatic ride height control.
FIG. 2 is a schematic view of an exemplary display of a set level position.
The device for automatic ride height control includes an input and output unit 1, a control unit 2, a compressor 3, an engine control unit 4, the vehicle wheels 5, 6 having associated air springs 7, 8, and position sensors 9, 10 associated with vehicle wheels 5, 6.
The driver is able to set and possibly fix a desired setpoint level position via input and output unit 1, which will be explained in greater detail below. In addition, the driver may have the set level position displayed to himself. The set setpoint level position is transmitted to control unit 2 via input and output unit 1. Control unit 2 ascertains from the data of position sensors 9, 10 the actual level position and activates compressor 3 accordingly, which inflates air springs 7, 8 accordingly or is caused to inflate them, so that the desired setpoint level position is reached. In order to give the driver the possibility of loading compressor 3 less strongly or to rely situationally on a certain ground clearance, he may fix or lock a selected setpoint level position.
In FIG. 2, an exemplary display 20 for indicating the set setpoint level position is illustrated, the display 20 being able to be designed, e.g., as a touch screen, thus simultaneously acting as an input unit.