Height and inclination control of a wagon body
AssigneeKnorr-Bremse GmbH
InventorsStefan Holzl, Winfried Hommen, Ralf-Christian Oberthur, Georg Stauble
Life of this patent
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Abstract
The present invention is a process and system for controlling the wagon body of a vehicle which can be used alone or in combination with a steel spring system. The control system has comparatively small geometrical dimensions and requires relatively little energy and includes a pressure accumulator connected in parallel to delivery pump 8 of the hydraulic pressure medium. The two devices working together against the pressure of the hydropneumatic pressure accumulator of the body height system. Thus, the pressure accumulator can be charged during the travel of the vehicle so that the pump does not have to be designed according to the peak load in the case of a fast load change.
Claims20
Process for controlling height and inclination of a wagon body for vehicles, having at least one hydropneumatically controlled suspension--damping system which includes a hydropneumatic suspension accumulator, a hydraulic spring strut, a pump, a supply accumulator for a pressure medium, sensors sensing height and inclination of the wagon body and signals of the sensors being fed to an electronic control unit, the process comprising operating the pump to work directly against the hydropneumatic pressure of the hydropneumatic suspension accumulator and pressure medium is removed from the supply accumulator only when delivery volume of the pump is not sufficient for keeping the height of the wagon body constant.
Arrangement for controlling height of a wagon body of a vehicle including at least one hydropneumatically controlled suspension-damping system comprising
- a sensor which senses height of the wagon body and feeds signals of the sensor to an electronic control unit,
- a hydropneumatic suspension accumulator,
- at least one supply accumulator for a pressure medium,
- at least one spring strut which causes vertical height control and is connected to the hydropneumatic suspension accumulator,
- a pump in parallel to the supply accumulator, and
- valves controlled by the control unit for selectively connecting the pump and the supply accumulator to the spring strut to work against the hydropneumatic pressure of the hydropneumatic suspension accumulator.
Dependencies are inferred from the claim text.