Patent · US Active

Method and device for adapting an injection characteristic curve

US8374770B2 · kind B2 · utility

4Cited by

11References

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	Nov 19, 2008
Grant date	Feb 12, 2013
Priority date	—
Expiry date	Oct 30, 2029

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2200/1015
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

When the internal combustion engine is in an injection-free operating mode, a selected injector is open for injecting a small fuel amount, whereby at least one working cycle with injector control follows or precedes one cycle without control, a differential of two subsequent segment times of the cylinder associated with the selected injector or another variable, that reproduces a temporal crankshaft angle speed modification, is determined as a measurement value respectively for the cycle with and without control, and a relation is formed between the values of the cycles with or without control and used to correct the injection characteristic curve. The engine operates with active ignition and the value for the cycle with control is tested by taking into account ignition faults and the relation is only used to correct the curve if the value in the cycle with control significantly deviates from the one without control.

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