Patent · US Active

Monitoring deviations occurring in the valve drive of an internal combustion engine, and electronic engine control units for executing such methods

US11143126B2 · kind B2 · utility

0Cited by

7References

10Claims

0Family size

Assignee

VITESCO TECHNOLOGIES GMBH · DE

Inventors

Tobias Braun · Undorf, DE
Matthias Delp · Bad Abbach, DE
Frank Maurer · Skokie, US

Key dates

Filing date	Oct 9, 2017
Grant date	Oct 12, 2021
Priority date	—
Expiry date	Oct 9, 2037

Classification

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

Abstract

Various embodiments include a method for detecting deviations occurring in the valve drive of an internal combustion engine comprising: measuring dynamic pressure oscillations of intake air in an air intake tract of respective internal combustion engine during operation; calculating an inlet valve stroke phase difference and/or an outlet valve stroke phase difference based on the measured dynamic pressure oscillation; calculating a valve stroke phase deviation value with respect to a valve stroke phase reference value based on the calculated phase difference; and calculating a first valve drive deviation value based on the valve stroke phase deviation value.

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