WO1988005498A1 - Element de pompe d'injection - Google Patents

Element de pompe d'injection Download PDF

Info

Publication number
WO1988005498A1
WO1988005498A1 PCT/SE1988/000013 SE8800013W WO8805498A1 WO 1988005498 A1 WO1988005498 A1 WO 1988005498A1 SE 8800013 W SE8800013 W SE 8800013W WO 8805498 A1 WO8805498 A1 WO 8805498A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
pump
cylinder
piston
chamber
Prior art date
Application number
PCT/SE1988/000013
Other languages
English (en)
Inventor
Bengt Gadefelt
Original Assignee
Saab-Scania Aktiebolag
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 Saab-Scania Aktiebolag filed Critical Saab-Scania Aktiebolag
Publication of WO1988005498A1 publication Critical patent/WO1988005498A1/fr

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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders
    • F02M59/265—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders characterised by the arrangement or form of spill port of spill contour on the piston
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/12—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship providing a continuous cyclic delivery with variable pressure
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Elément de pompe d'injection dans lequel l'injection de carburant est commandée par un piston (3) au moins, lequel se meut dans un cylindre (2) et qui définit au-dessus du piston une chambre ou espace (12) dans laquelle ou lequel le carburant à injecter est mis sous pression. L'objet de l'élément de pompe est de permettre à la pression du carburant d'injection d'augmenter dans la chambre (12) à une vitesse relativement faible de préférence à bas régime du moteur, de manière à réduire ce que l'on appelle le retard à l'allumage. L'invention est principalement caractérisée par le fait que la paroi du cylindre comporte au moins un trou (14) par lequel le carburant, comprimé au cours du mouvement ascendant du piston (3), passe dans le cylindre (2).
PCT/SE1988/000013 1987-01-20 1988-01-19 Element de pompe d'injection WO1988005498A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8700189A SE455627B (sv) 1987-01-20 1987-01-20 Pumpelement vid en brensleinsprutningspump
SE8700189-7 1987-01-20

Publications (1)

Publication Number Publication Date
WO1988005498A1 true WO1988005498A1 (fr) 1988-07-28

Family

ID=20367211

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1988/000013 WO1988005498A1 (fr) 1987-01-20 1988-01-19 Element de pompe d'injection

Country Status (2)

Country Link
SE (1) SE455627B (fr)
WO (1) WO1988005498A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0884472A1 (fr) * 1997-06-10 1998-12-16 Umberto Verza Pompe d'injection de carburant pour moteur diesel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE572711C (de) * 1931-07-03 1933-03-22 Maschf Augsburg Nuernberg Ag Brennstoffpumpe
DE916605C (de) * 1951-09-16 1954-08-12 Augsburg Nuernberg A G Zweigni Verfahren einer in Vor- und Haupteinspritzung unterteilten Kraftstoffeinspritzung mittels Einspritzpumpe
GB2028421A (en) * 1978-08-26 1980-03-05 Daimler Benz Ag Fuelinjection pump for internal-combustion engines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE572711C (de) * 1931-07-03 1933-03-22 Maschf Augsburg Nuernberg Ag Brennstoffpumpe
DE916605C (de) * 1951-09-16 1954-08-12 Augsburg Nuernberg A G Zweigni Verfahren einer in Vor- und Haupteinspritzung unterteilten Kraftstoffeinspritzung mittels Einspritzpumpe
GB2028421A (en) * 1978-08-26 1980-03-05 Daimler Benz Ag Fuelinjection pump for internal-combustion engines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0884472A1 (fr) * 1997-06-10 1998-12-16 Umberto Verza Pompe d'injection de carburant pour moteur diesel
US5961304A (en) * 1997-06-10 1999-10-05 Lombardini Fabbrica Italiana Motori S.P.A. Injection pump for diesel-cycle internal combustion engines

Also Published As

Publication number Publication date
SE8700189D0 (sv) 1987-01-20
SE455627B (sv) 1988-07-25

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