Self-Pumping Hydropneumatic Suspension Strut

摘要

A self-pumping hydropneumatic suspension strut includes a high pressure area and a low pressure area, wherein pressurized medium is exchanged between the high pressure area and the low pressure area via a passive pump device. At least two separate channel systems with connection orifices which determine level position and are controlled depending on the position of a piston rod are provided between the high pressure area and the low pressure area. One of the channel systems can be blocked by a valve device, and wherein the suspension strut has a displacing device with a spring seat for a supporting spring. The displacing device is operated via the working movement of the piston rod.

主权项

1. A self-pumping hydropneumatic suspension strut (1) comprising:
a high pressure area (11; 39); a low pressure area (30); a piston rod (7); a pump device (21; 23) for exchanging pressurized medium between said high pressure area (11; 39) and said low pressure area (30); at least two separate channel systems (47; 49) between said high pressure area (11; 39) and said low pressure area (30), said at last two channel systems comprising level position determining connection orifices (43; 45) which are controlled depending on the position of a said piston rod (7); a valve device (51) for blocking one of said at last two channel systems (49); a displacing device (55) comprising a spring seat (57) for a supporting spring (59); said displacing device (55) operated by a working movement of said piston rod (7).