Patent · US Active

Device and method for monitoring a fuel metering system

US8191411B2 · kind B2 · utility

2Cited by

2References

5Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Hans Georg Bossemeyer · Stuttgart, DE
Michael Hackner · Erbach, DE

Key dates

Filing date	Sep 11, 2006
Grant date	Jun 5, 2012
Priority date	—
Expiry date	Apr 8, 2028

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2041/225
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method and device for monitoring a fuel metering system, in which fuel is pumped from a low-pressure zone into a high-pressure zone. The pressure in the high-pressure zone is detected. An error is recognized on the basis of the pressure variation in the high-pressure zone. The type of error is recognized on the basis of the shape of a pressure drop curve. The variation of the pressure quantity over time is approximated using a function such as the hyperbolic function. The type of error is recognized on the basis of the quantity characterizing the function.

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