Patent · US Active

Monitoring the ventilation of a crankcase of an internal combustion engine

US12264634B2 · kind B2 · utility

0Cited by

3References

9Claims

0Family size

Assignee

VITESCO TECHNOLOGIES GMBH · DE

Inventors

Paul Rodatz · Landshut, DE
Gerhard Haft · Munich, DE
Michael Nienhoff · Regensburg, DE
Fabian Fink · Reichenschwand, DE

Key dates

Filing date	Nov 28, 2022
Grant date	Apr 1, 2025
Priority date	—
Expiry date	Nov 28, 2042

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2250/08
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

Various embodiments include a method for monitoring the ventilation of a crankcase of an internal combustion engine with combustion chambers and a nitrogen oxide sensor arranged in an exhaust system, the sensor configured to detect an amount of nitrogen oxide in exhaust gas of the internal combustion engine. An example method includes: determining a predefined operating mode of the internal combustion engine defined by substantially no combustion of an air/fuel mixture taking place inside the combustion chambers; determining an amount of nitrogen oxide in the exhaust gas during the predefined operating mode of the internal combustion engine using the exhaust gas sensor; and identifying functional ventilation of the crankcase if the detected nitrogen oxide level exceeds a predefined nitrogen oxide threshold or identifying a malfunction if the detected nitrogen oxide level is below the predefined nitrogen oxide threshold.

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