Patent · US Expired

Hydraulic play compensating element

US4881499A · kind A · utility

11Cited by

7References

8Claims

0Family size

Assignee

Mercedes-Benz Group AG · DE

Inventors

Markus Dietrich · Regensburg, DE
Frank Berger · Leutenbach, DE

Key dates

Filing date	Jan 13, 1989
Grant date	Nov 21, 1989
Priority date	—
Expiry date	Jan 13, 2009

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L1/245
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A hydraulic play compensating element adapted to be positioned in the valve train of an internal-combustion engine is described which comprises a cylinder part closes at one end and a piston part slidable longitudinally in the latter. The piston part contains a supply chamber which is pressurized by lubricating oil from the lubricating oil circuit and which is separated from a pressure chamber by a connecting duct controlled by a valve. In order to switch off the play compensating function of the play compensating element during engine braking service, a shut-off valve is provided in the supply chamber for closing or opening the connecting duct as a function of the lubricating oil pressure in the supply chamber.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.