The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 2025
Filed:
Feb. 15, 2022
Vitesco Technologies Gmbh, Regensburg, DE;
Gerhard Haft, Maxhütte-Haidhof, DE;
Carsten Bruns, Regensburg, DE;
Thomas Czarnecki, Sinsheim, DE;
Karl Gruenbeck, Kelheim, DE;
Vitesco Technologies GmbH, Regensburg, DE;
Abstract
The disclosure relates to a method for leakage diagnosis. The method includes influencing the introduction of gas along a crankcase aeration line into a crankcase of an internal combustion engine and acquiring a measurement signal profile by an exhaust-gas sensor arranged in an exhaust-gas tract of an internal combustion engine. The measurement signal profile is characteristic of at least one exhaust-gas property of the exhaust gas. The method includes providing an expected measurement signal profile which is characteristic of the exhaust-gas property of the exhaust gas in the exhaust-gas tract based on the influence on the introduction of gas into the crankcase. Additionally, the method includes comparing the acquired measurement signal profile with the expected measurement signal profile and identifying that the crankcase ventilation line has a leak if, during the comparison, the acquired measurement signal profile deviates from the expected measurement signal profile by a predetermined threshold value.