Patent · US Expired

Arrangement for controlling a device for changing the valve timing of an internal combustion engine

US6055950A · kind A · utility

7Cited by

2References

2Claims

0Family size

Assignee

INA Wälzlager Schaeffler oHG · DE

Inventors

Jens Schafer · Herzogenaurach, DE
Bernd Reuter · Arnstorf, DE
Martin Scheidt · Höchstadt an der Aisch, DE
Dirk Heintzen · Hagen, DE

Key dates

Filing date	Aug 21, 1998
Grant date	May 2, 2000
Priority date	—
Expiry date	Aug 21, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/2102
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An arrangement for controlling a device for changing the control times of gas exchange valves of an internal combustion engine is provided. The device includes a hydraulic pressure cylinder with an axially movable piston the setting motions of which are transformed into relative rotation of a drive part of the pressure cylinder connected to the crankshaft in relation to a drive part of the pressure cylinder connected to the camshaft. the hydraulic pressure cylinder is subdivided by the piston into two pressure chambers (3, 4), with each being provided with a pressure medium connection (5, 6) to which a hydraulic pump (7) is connected upstream and a pressure medium reservoir (8) is connected downstream, and whose pressure medium inflow or pressure medium outflow is controlled by a hydraulic valve arrangement controlled by a motor controller (9).

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