Patent · US Expired

Method of and device for supervising electrical fuel injection systems

US4502447A · kind A · utility

6Cited by

5References

8Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Hans Schn/u/ rle · Walheim, DE
Herbert Arnold · Eberdingen, DE
Michael Horbelt · Schwieberdingen, DE

Key dates

Filing date	Oct 14, 1983
Grant date	Mar 5, 1985
Priority date	—
Expiry date	Oct 14, 2003

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2041/228
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

Disclosed are a method and a device for indicating the malfunction of an apparatus for generating injection control pulses for a fuel injection system. The method compares relatively narrow trigger pulses derived from ignition pulses with the fuel injection control pulses. When the injection control pulses coincide with the trigger pulses, no indication is present. Only when an injection control pulse is missing does the trigger pulse prevail and trigger a bistable switching circuit which activates an optical or acoustical indicator.

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