Patent · US Active

Systems and methods to diagnose valve leakage in a vehicle

US8855898B2 · kind B2 · utility

4Cited by

6References

19Claims

0Family size

Assignee

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

Oliver Maier · Worms, DE
Michael Leykauf · Darmstadt, DE

Key dates

Filing date	Apr 29, 2011
Grant date	Oct 7, 2014
Priority date	—
Expiry date	Dec 10, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/30
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

Systems and methods to diagnose valve leakage in a vehicle storing gaseous fuel in two or more vessels. A valve regulating the flow of the gaseous fuel from one of the vessels is closed and reopened, while the other vessels are providing gaseous fuel during a full run. The pressure spike from reopening the valve is analyzed to determine the rate of pressure change. Pressure spikes having a rate of change lower than a threshold parameter are indicative of a leaking valve.

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