Patent Number: 6,167,853

Title: Hydraulic control device for at least one lifting valve

Abstract: The invention relates to a hydraulic control device for a lifting valve, the said device comprising a valve stem capable of being moved by two spring means acting in opposition to one another, the valve stem being capable of being activated hydraulically in the region of its end positions. According to the invention, the hydraulic control device contains a hydraulically regulatable spring means which is assigned a hydraulically acting auxiliary control member, by means of which the working fluid of the hydraulically regulatable spring means can be relieved of pressure.

Inventors: Letsche; Ulrich (Stuttgart, DE)

Assignee: DaimlerChrysler AG

International Classification: F01L 9/00 (20060101); F01L 9/02 (20060101); F01L 009/02 ()

Expiration Date: 01/02/2018