Patent · US Active

Injector calibration method for operating an internal combustion engine

US7765054B2 · kind B2 · utility

6Cited by

4References

20Claims

0Family size

Assignee

CONTINENTAL AUTOMOTIVE GMBH · DE

Inventors

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

Key dates

Filing date	May 25, 2007
Grant date	Jul 27, 2010
Priority date	—
Expiry date	May 25, 2027

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2200/1002
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method for operating an internal combustion engine has the steps: (a) during an overrun phase of the internal combustion engine, activating an injector of a first combustion chamber for a predetermined activation time τinj with a predetermined activation voltage Ui=1, (b) measuring a torque variation, (c) determining, from the torque variation, a fuel quantity mi=1 of the fuel injected by the injector during the activation time τinj, (d) varying the activation voltage to a value Ui+1 which differs from Ui, (e) repeating steps (a) to (d) with further incrementation of i until i has reached a preset value N or the internal combustion engine is no longer in the overrun phase, and (f) determining an injector characteristic value of the injector of the first combustion chamber from the fuel quantities m1, m2, . . . , mN and the activation voltages U1, U2, . . . , UN.

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