Patent · US Expired

Method for cylinder equalization in an internal combustion engine operating by direct injection

US6302083A · kind A · utility

6Cited by

2References

8Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Andreas Karcher · Weingarten, DE
Achim Przymusinski · Regensburg, DE
Ralf Schernewski · Stuttgart, DE

Key dates

Filing date	Oct 2, 2000
Grant date	Oct 16, 2001
Priority date	—
Expiry date	Oct 2, 2020

Classification

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

Abstract

The values for the speed of the crankshaft are corrected by means of an acausal mean-value filter, and the change in the kinetic energy of the crankshaft in the expansion interval of a cylinder is calculated from the dynamically corrected speed values and referred to the maximum fuel quantity which can be fed in this interval. The dimensionless residue obtained therefrom represents for the cylinder under consideration a measure of too much or too little injected fuel. Correction terms are derived from the calculated residues for the injection times of the individual cylinders. This renders adaptation possible in the overall region of the characteristic diagram, in particular also in the case of speed transitions.

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