Patent · US Active

Method and device for detecting the idle stroke of injectors

US7406861B2 · kind B2 · utility

5Cited by

6References

14Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Uwe Jung · Hungersacker, DE
Janos Radeczky · Wenzenbach, DE
Michael Wirkowski · Regensburg, DE

Key dates

Filing date	Mar 14, 2007
Grant date	Aug 5, 2008
Priority date	—
Expiry date	Mar 14, 2027

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M65/005
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In a method and device for characterising the return stroke of injectors, in particular piezo-injectors of an internal combustion engine provided with a common rail system, when the internal combustion engine is switched off, a constant pressure is dropped in the rail, thereby making it possible to measure the rail pressure and to adjust the injectors by corresponding power. The actuating power is increased until a discontinuity in a temporal progression of rail pressure occurs. The actuating energy applied for the state and a pressure available in the make it possible to measure the return stroke of corresponding injector.

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