Patent · US Active

Method and control device for operating an internal combustion engine

US11208961B2 · kind B2 · utility

0Cited by

1References

10Claims

0Family size

Assignee

MAN Energy Solutions SE · DE

Inventors

Armin Weber · Mindelheim, DE
Martin Karg · Uhingen, DE

Key dates

Filing date	Jan 13, 2020
Grant date	Dec 28, 2021
Priority date	—
Expiry date	Jan 13, 2040

Classification

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

Abstract

A method for operating an internal combustion engine having at least one fuel injector that is activated for opening and closing via a solenoid valve of a respective fuel injector. Commencing with the activation of the fuel injector for opening, structure-borne sound waves emitted by the fuel injector over the time are detected by measurement. A structure-borne sound wave signal detected by measurement over the time is evaluated such that dependent on the amount of at least one maximum of the structure-borne sound wave signal and/or dependent on the number of the maximums of the structure-borne sound wave signal and/or in the presence of multiple maximums dependent on the time sequence and/or on the amount of the maximums, an operating state of the respective fuel injector is deduced.

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