Patent · US Active

Device for variably adjusting the control times of gas exchange valves of an internal combustion device

US8763574B2 · kind B2 · utility

2Cited by

5References

10Claims

0Family size

Assignee

Schaeffler Technologies AG & Co. KG · DE

Inventors

Jurgen Plate · Gerhardshofen, DE
Jochen Auchter · Weisendorf, DE
Lutz Witthoft · Herzogenaurach, DE

Key dates

Filing date	Aug 23, 2010
Grant date	Jul 1, 2014
Priority date	—
Expiry date	Nov 18, 2030

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L2001/34446
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A device (11) for variably adjusting the control times of gas exchange vales (9, 10) of an internal combustion engine (1) having a hydraulic phase adjustment device (12) and at least one volume accumulator (31), wherein the phase adjustment device (12) can be brought into driving connection with a crankshaft (2) and a camshaft (6, 7) and at least one early adjustment chamber (24) and at least one late adjustment chamber (25) which can be supplied with pressure medium via pressure medium lines (26a, b, p. v), or from which pressure medium can be drained. A phase position of the camshaft (6, 7) can be adjusted relative to the crankshaft (2) in the direction of early control times by supplying pressure medium to the early adjustment chamber (24) while simultaneously draining pressure medium from the late adjustment chamber (25), wherein a phase position of the camshaft (6, 7) can be adjusted relative to the crankshaft (2) in the direction of late control times by supplying pressure medium to the late adjustment chamber (25) while simultaneously draining pressure medium from the early adjustment chamber (24), wherein pressure medium can be supplied to the volume accumulator(s) (31) dur…

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