Patent · US Active

Method and device for monitoring the functioning of a valve stroke adjusting device of an internal combustion engine during cold starts

US7269501B2 · kind B2 · utility

2Cited by

7References

14Claims

0Family size

Assignee

Dr. Ing. h.c. F. Porsche AG · DE

Inventors

Thomas Melzig · Leonberg, DE
Nils Nagel · Leonberg, DE

Key dates

Filing date	Jun 7, 2006
Grant date	Sep 11, 2007
Priority date	—
Expiry date	Jun 7, 2026

Classification

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

Abstract

A method and device for monitoring the functionality of a valve stroke adjusting device of an internal combustion engine in a cold start phase. The internal combustion engine includes an electronically controllable throttle, the control utilizing an integral component to control the throttle, and the functionality is monitored by determining the integral component in a cold start phase, comparing the integral component with at least one predetermined threshold value and evaluating the functionality of the valve stroke adjusting device on the basis of the comparison.

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