Patent · US Expired

Method for diagnosing the adjustment device of a swirl control valve

US6684689B2 · kind B2 · utility

3Cited by

4References

11Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Robert Fromm · Donaustauf, DE
Johann Graf · Eschborn, DE
Michael Henn · Lehre, DE
Hong Zhang · Tegernheim, DE

Key dates

Filing date	Apr 1, 2002
Grant date	Feb 3, 2004
Priority date	—
Expiry date	Apr 1, 2022

Classification

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

Abstract

The activation of a swirl control valve which is seated downstream of a throttle valve in the intake tract of an internal combustion engine is diagnosed. The swirl control valve is activated by a specific adjustment travel within a supercritical operating range of the intake pipe pressure in the intake tract downstream of the throttle valve. If a specific jump in pressure that is dependent on the adjustment travel does not take place in the intake tract downstream of the throttle valve, a defect in the actuation of the swirl control valve is diagnosed.

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