IT1284327B1 - Diagnosis of leakage of internal combustion engine high-pressure injection system - generating pressure signal related to fuel pressure and comparing with reference pressure signal, and determining fuel leakage condition if pressure signal is less than reference signal - Google Patents

Diagnosis of leakage of internal combustion engine high-pressure injection system - generating pressure signal related to fuel pressure and comparing with reference pressure signal, and determining fuel leakage condition if pressure signal is less than reference signal

Info

Publication number
IT1284327B1
IT1284327B1 ITTO960029A IT1284327B1 IT 1284327 B1 IT1284327 B1 IT 1284327B1 IT TO960029 A ITTO960029 A IT TO960029A IT 1284327 B1 IT1284327 B1 IT 1284327B1
Authority
IT
Italy
Prior art keywords
pressure
signal
pressure signal
fuel
leakage
Prior art date
Application number
Other languages
Italian (it)
Inventor
Cristofaro Francesco De
Roberto Imarisio
Carlo Andrea Malvicino
Riccardo Buratti
Original Assignee
Fiat Ricerche
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fiat Ricerche filed Critical Fiat Ricerche
Priority to ITTO960029 priority Critical patent/IT1284327B1/en
Publication of ITTO960029A0 publication Critical patent/ITTO960029A0/en
Priority to EP97100612A priority patent/EP0785358B1/en
Priority to ES97100612T priority patent/ES2174137T3/en
Priority to DE69711250T priority patent/DE69711250T2/en
Priority to US08/786,438 priority patent/US5773716A/en
Publication of ITTO960029A1 publication Critical patent/ITTO960029A1/en
Application granted granted Critical
Publication of IT1284327B1 publication Critical patent/IT1284327B1/en

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Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Landscapes

  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

The method of diagnosing leakage in a high-pressure injection system of an IC engine having a number of cylinders (3) and a number of injectors (5) involves generating an operating signal (Sp: delta-Q) related to a physical quantity of the injection system. The operating signal is compared with a reference operating value )Po: delta-Qth1). A fuel leakage condition is determined in the event of a predetermined operating relationship between the operating signal and the reference operating value. The operating signal is a pressure signal related to a pressure of the fuel in the injection system and the reference operating value is a reference pressure value (Po).
ITTO960029 1996-01-19 1996-01-19 Diagnosis of leakage of internal combustion engine high-pressure injection system - generating pressure signal related to fuel pressure and comparing with reference pressure signal, and determining fuel leakage condition if pressure signal is less than reference signal IT1284327B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ITTO960029 IT1284327B1 (en) 1996-01-19 1996-01-19 Diagnosis of leakage of internal combustion engine high-pressure injection system - generating pressure signal related to fuel pressure and comparing with reference pressure signal, and determining fuel leakage condition if pressure signal is less than reference signal
EP97100612A EP0785358B1 (en) 1996-01-19 1997-01-16 Method and unit for diagnosing leakage of an internal combustion engine high-pressure injection system
ES97100612T ES2174137T3 (en) 1996-01-19 1997-01-16 METHOD AND LEAK DIAGNOSTIC UNIT OF A HIGH PRESSURE INJECTION SYSTEM OF AN INTERNAL COMBUSTION ENGINE.
DE69711250T DE69711250T2 (en) 1996-01-19 1997-01-16 Method and unit for leak diagnosis of a high-pressure injection system of a fuel machine
US08/786,438 US5773716A (en) 1996-01-19 1997-01-21 Method and unit for diagnosing leakage of an internal combustion engine high-pressure injection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTO960029 IT1284327B1 (en) 1996-01-19 1996-01-19 Diagnosis of leakage of internal combustion engine high-pressure injection system - generating pressure signal related to fuel pressure and comparing with reference pressure signal, and determining fuel leakage condition if pressure signal is less than reference signal

Publications (3)

Publication Number Publication Date
ITTO960029A0 ITTO960029A0 (en) 1996-01-19
ITTO960029A1 ITTO960029A1 (en) 1997-07-19
IT1284327B1 true IT1284327B1 (en) 1998-05-18

Family

ID=11414133

Family Applications (1)

Application Number Title Priority Date Filing Date
ITTO960029 IT1284327B1 (en) 1996-01-19 1996-01-19 Diagnosis of leakage of internal combustion engine high-pressure injection system - generating pressure signal related to fuel pressure and comparing with reference pressure signal, and determining fuel leakage condition if pressure signal is less than reference signal

Country Status (1)

Country Link
IT (1) IT1284327B1 (en)

Also Published As

Publication number Publication date
ITTO960029A1 (en) 1997-07-19
ITTO960029A0 (en) 1996-01-19

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TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19990128