WO1999039094A3 - Driver circuit for fuel vapor leak detection system - Google Patents

Driver circuit for fuel vapor leak detection system Download PDF

Info

Publication number
WO1999039094A3
WO1999039094A3 PCT/CA1999/000068 CA9900068W WO9939094A3 WO 1999039094 A3 WO1999039094 A3 WO 1999039094A3 CA 9900068 W CA9900068 W CA 9900068W WO 9939094 A3 WO9939094 A3 WO 9939094A3
Authority
WO
WIPO (PCT)
Prior art keywords
space
pump
driver circuit
detection system
vent
Prior art date
Application number
PCT/CA1999/000068
Other languages
French (fr)
Other versions
WO1999039094A2 (en
Inventor
John E Cook
William J Boucher
Raymond Rasokas
Original Assignee
Siemens Canada Ltd
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
Priority claimed from US09/238,192 external-priority patent/US6301955B1/en
Application filed by Siemens Canada Ltd filed Critical Siemens Canada Ltd
Publication of WO1999039094A2 publication Critical patent/WO1999039094A2/en
Publication of WO1999039094A3 publication Critical patent/WO1999039094A3/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M25/0809—Judging failure of purge control system
    • F02M25/0818—Judging failure of purge control system having means for pressurising the evaporative emission space
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M25/0836—Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M2025/0845—Electromagnetic valves

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)

Abstract

An on-board evaporative emission leak detection system has a module (22) for detecting leakage from an evaporative emission space of a fuel system of an automotive vehicle. Interior space (103) of the module's enclosure (102) is communicated to atmosphere. A pump (50) is disposed within space (103) and has an inlet (56) communicated to the interior space and a flow passage (70, 72) at its outlet (58) to allow the pump to create pressure in the evaporative emission space suitable for performance of a leak test. A vent valve (52) is disposed within space (103) and is selectively operable to vent and not vent the flow passage to space (103). An electromagnet actuator (104) has a single electric coil (116) that operates both the pump and the vent valve. A driver circuit (1000) to the coil provides a first current component for operating the pump and a second current component for operating the vent valve.
PCT/CA1999/000068 1998-01-28 1999-01-28 Driver circuit for fuel vapor leak detection system WO1999039094A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US7284298P 1998-01-28 1998-01-28
US60/072,842 1998-01-28
US09/238,192 US6301955B1 (en) 1999-01-27 1999-01-27 Driver circuit for fuel vapor leak detection system
US09/238,192 1999-01-27

Publications (2)

Publication Number Publication Date
WO1999039094A2 WO1999039094A2 (en) 1999-08-05
WO1999039094A3 true WO1999039094A3 (en) 2000-01-06

Family

ID=26753820

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA1999/000068 WO1999039094A2 (en) 1998-01-28 1999-01-28 Driver circuit for fuel vapor leak detection system

Country Status (1)

Country Link
WO (1) WO1999039094A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001042642A1 (en) * 1999-12-10 2001-06-14 Delphi Technologies, Inc. Vacuum based fuel system
US7131322B2 (en) * 2005-04-07 2006-11-07 Daimlerchrysler Corporation Vehicle evaporative system diagnostic
FR2958690B1 (en) * 2010-04-08 2014-01-17 Continental Automotive France METHOD AND DEVICE FOR DETECTING THE LOCKING OF THE FAN VALVE FUEL VAPOR VALVE
DE102011101657B3 (en) * 2011-05-17 2012-05-24 Daimler Ag Device for binding vapors from a fuel tank

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5146902A (en) * 1991-12-02 1992-09-15 Siemens Automotive Limited Positive pressure canister purge system integrity confirmation
US5411004A (en) * 1993-02-03 1995-05-02 Siemens Automotive Limited Positive pressure canister purge system integrity confirmation
US5474050A (en) * 1995-01-13 1995-12-12 Siemens Electric Limited Leak detection pump with integral vent seal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5146902A (en) * 1991-12-02 1992-09-15 Siemens Automotive Limited Positive pressure canister purge system integrity confirmation
US5411004A (en) * 1993-02-03 1995-05-02 Siemens Automotive Limited Positive pressure canister purge system integrity confirmation
US5474050A (en) * 1995-01-13 1995-12-12 Siemens Electric Limited Leak detection pump with integral vent seal

Also Published As

Publication number Publication date
WO1999039094A2 (en) 1999-08-05

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