Patent · US Active

Method for testing the fuel quantity balance in a common rail system, corresponding engine control system, and corresponding diagnostic device

US8849547B2 · kind B2 · utility

0Cited by

0References

10Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Michael Hackner · Erbach, DE
Stefan Hoerenberg · Stuttgart, DE

Key dates

Filing date	Mar 14, 2012
Grant date	Sep 30, 2014
Priority date	—
Expiry date	Mar 30, 2033

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M63/025
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In a common rail system having two electrically controlled actuating elements, e.g., a metering unit at the input side of a high-pressure pump and a pressure regulating valve on the common rail, different fuel delivery quantities are able to be set in the common rail system while the vehicle is stationary, independent of the current engine load, by controlling operating points via one of the actuating elements and subsequently regulating the other actuating element. Control currents of the actuating elements correspond to the operating points. These control currents, or differences of control currents, are compared to target values to enable an evaluation of the common rail system.

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