Patent · US Active

Method for the diagnosis of engine misfires in an internal combustion engine

US11226264B2 · kind B2 · utility

1Cited by

9References

12Claims

0Family size

Assignee

VOLKSWAGEN AKTIENGESELLSCHAFT · DE

Inventors

Andre Shurkewitsch · Calberlah, DE
Heiko Sternberg · Wolfsburg, DE
Nikolaus Zimbalist · Edemissen, DE
Robert Wetten · Berlin, DE
Elmar Millich · Berlin, DE
Jan Vogelsang · Braunschweig, DE

Key dates

Filing date	Aug 31, 2020
Grant date	Jan 18, 2022
Priority date	—
Expiry date	Aug 31, 2040

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method for the diagnosis of engine misfires in an internal combustion engine having at least one cylinder, and includes the steps of: Determining exhaust back pressure values of the individual cylinders over at least two working cycles, correlating the exhaust back pressure values with the camshaft position and/or the working cycle, determining the exhaust back pressure maxima and/or exhaust back pressure minima per working cycle, comparing the exhaust back pressure maxima and/or exhaust back pressure minima between the individual cylinders—in the case of multiple cylinders—and/or to maximum and/or minimum values from previous working cycles and determining the deviations, comparing the deviations to a predetermined threshold value. The invention also relates to a control device for carrying out the method and a motor vehicle including such a control device.

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