Patent · US Active

Method and control device for diagnosing a charge cycle valve stroke adjusting system of an internal-combustion engine

US7308355B2 · kind B2 · utility

0Cited by

12References

16Claims

0Family size

Assignee

Dr. Ing. h.c. F. Porsche AG · DE

Inventors

Dietmar Schwarzenthal · Ditzingen, DE
Nils Nagel · Leonberg, DE
Thomas Melzig · Leonberg, DE

Key dates

Filing date	Jun 22, 2006
Grant date	Dec 11, 2007
Priority date	—
Expiry date	Jun 22, 2026

Classification

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

Abstract

In a method for diagnosing a charge cycle valve stroke adjusting system of an internal-combustion engine having at least one exhaust gas sensor which supplies an output signal continuously varying with an exhaust gas constituent, the spread width of the output signal is determined, and compared with a reference value. Defects of the valve stroke adjusting system are detected on the basis of the comparison.

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