Levelling valve for automatically keeping constant the vehicle h

Details Levelling valve for automatically keeping constant the vehicle h Levelling valve for automatically keeping constant the vehicle h

1997-02-20

1999-02-16

English, Peter C.

Land vehicles

Body elevation or tilt

Establishing riding or trim height

28012416, 267 6416, 13762568, 251 635, B60G 17056

Patent

active

058712178

ABSTRACT:
A levelling valve is provided for automatically keeping constant the vehicle height of a commercial vehicle with air suspension. The levelling valve comprises a spring loaded double valve body (17), an inlet seat (18), a hollow control rod (20) having an outlet seat (19) for the double valve body (17) and movable toward sealed engagement with the double valve body (17), an actuation drive (6) having a guiding member (27) and an eccentric follower (10) responsive to the change in vehicle height for moving the control rod (20) towards or away from sealing engagement with the double valve body (17). A first vehicle height according to a closing position may be controlled by the actuation drive (6). A control piston (28) is located in a control chamber (31) in alignment with the axis (3) of the control rod (20) and is provided for the attainment for setting of a second vehicle height. The control chamber (31) is located in the guiding member (27) of the actuation drive (6). The control piston (28) is slidingly and sealingly arranged in the guiding member (27) so that the eccentric follower (10) is not loaded by a force acting on the control piston (28) during the adjusted second vehicle height. The control rod (20) is supported on the control piston (28).

REFERENCES:
patent: 3006657 (1961-10-01), Augustin

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