WO2000047889A1 - Introduction de combustible par injection directe - Google Patents

Introduction de combustible par injection directe Download PDF

Info

Publication number
WO2000047889A1
WO2000047889A1 PCT/AU2000/000090 AU0000090W WO0047889A1 WO 2000047889 A1 WO2000047889 A1 WO 2000047889A1 AU 0000090 W AU0000090 W AU 0000090W WO 0047889 A1 WO0047889 A1 WO 0047889A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
combustion chamber
stem
fuel
poppet
Prior art date
Application number
PCT/AU2000/000090
Other languages
English (en)
Inventor
Alan Patrick Casey
Original Assignee
Alan Patrick Casey
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 Alan Patrick Casey filed Critical Alan Patrick Casey
Priority to AU26499/00A priority Critical patent/AU2649900A/en
Publication of WO2000047889A1 publication Critical patent/WO2000047889A1/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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • 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
    • F02M49/00—Fuel-injection apparatus in which injection pumps are driven or injectors are actuated, by the pressure in engine working cylinders, or by impact of engine working piston
    • F02M49/02—Fuel-injection apparatus in which injection pumps are driven or injectors are actuated, by the pressure in engine working cylinders, or by impact of engine working piston using the cylinder pressure, e.g. compression end 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
    • F02M67/00—Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection type
    • F02M67/02—Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection type the gas being compressed air, e.g. compressed in pumps
    • 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
    • F02M67/00—Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection type
    • F02M67/10—Injectors peculiar thereto, e.g. valve less type
    • F02M67/12—Injectors peculiar thereto, e.g. valve less type having valves
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/08—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by the fuel being carried by compressed air into main stream of combustion-air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/12—Other methods of operation
    • F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
    • F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
    • F02B23/101—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder the injector being placed on or close to the cylinder centre axis, e.g. with mixture formation using spray guided concepts
    • 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
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to injectors and more particularly to fuel injectors suitable for direct injection into a combustion chamber.
  • Valve timing which allows ingress of the injector charge is required to be matched with the injector pulse and piston motion.
  • a valve such as a poppet valve
  • the valve not only opens and closes the combustion chamber at appropriate times but also seals off the air intake tract and injector nozzle from the high temperature and pressure of combustion as would occur if the injector nozzle were in fluid communication with the combustion chamber at all times.
  • the present invention provides a poppet valve for controlling direct injection of a fuel charge into a combustion chamber wherein a face of the valve is, in use, exposed to combustion products within the combustion chamber, said poppet valve including an elongate valve stem slidably movable within a bore of a valve body between a seating position wherein the bore of the valve is closed and an open position wherein the valve stem is unseated, biasing means biasing the valve to its closed position, a longitudinal bore within the valve stem for directing fluid flow therealong from a fuel injector adapted to be mounted to the valve distal the valve face, a plurality of transverse bores radiating from the longitudinal bore and opening into a radial space between the valve stem and the valve body, said space being formed as a stepwise expansion zone in the valve body to a location at least adjacent the seating surfaces between the valve stem and the valve body, and further wherein there is at least one stepwise expansion within the longitudinal bore in the direction toward the valve face.
  • a valve in accord with the present invention is, because of its direct exposure to the combustion chamber, controlled in its opening and closing by the pressure within that chamber and within the injector as balanced against the magnitude of the biasing force.
  • the biasing force is extremely low, say, of the order of 5 psi so as to provide a positive seating between the valve stem and body under ambient conditions.
  • the stepwise expansion zones within the valve stem bore and the valve body function to reduce film adherence of the fuel charge from the injector as it travels through the valve to the combustion chamber and to maintain the atomization quality of that charge.
  • a direct injection valve of the present invention has applicability to 2- and 4-stroke cycle engines. It is also particularly well suited to our existing injector disclosed in United States Patent 5735468, the contents of which are incorporated herein by reference.
  • the induced air charge necessary for complete combustion of the fuel charge enters the combustion chamber/cylinder through valving separate from valving of the present invention.
  • Figure 1 is a longitudinal cross-sectional view of an embodiment of the present invention in situ
  • Figure 2 is a longitudinal cross-sectional view of the Figure 1 embodiment of the present invention in situ in combination with a pulsed fuel injector of US 5735468 in the form shown in Figure 4 of Australian provisional patent application PP 8022/99;
  • Figure3A is a cutaway view of the layout of Figure 2;
  • Figure3B is a magnified view of "Detail A" of Figure 3A;
  • Figure3C is a magnified view of "Detail B" of Figure 3 A
  • FIG. 1 shows a fuel injector 10 feeding a valve 11 of one embodiment of the present invention.
  • Naive 11 comprises extended valve body 12 connected by threads 13 to the outlet zone 14 of injector 10 which leads to inlet 15 of valve body 12.
  • Valve guide 16 within extended valve body 12 comprises a contracting inlet 17 to bore 18 within double step valve stem 19 fitted within valve stem 20.
  • Naive stem 20 is connected to valve guide 16 via pin 21.
  • coil spring 23 Between valve guide 16 and valve body 22 is positioned coil spring 23 which biases valve stem 20 so that spring 23 moves to seat valve stem 20 against valve body 22.
  • a first minor expansion step 24 between valve guide 16 and stem 19 leads into bore 18.
  • a second larger step 25 is formed between stems 19 and 20 is followed by transverse bores 26 into radial space 27 between body 22 and stem 20.
  • valve body 22 immediately upstream of valve seating surfaces 29,30 between body 22 and stem 20, respectively.
  • the bias force of spring 23 can be, say, of the order of 5 psi to provide sufficient force to seat stem 20 against body 22 at engine “off” conditions.
  • the effect of this low bias force is that positive pressure applied from the injector side or negative pressure from the combustion chamber side readily opens valve 11 to allow ingress of a fuel charge into combustion chamber 31.
  • combustion chamber 31 contains a spark plug 32 while injector 40 mounted atop valve 11 is a double solenoid pulse injector as described in International patent application PCT/AUOO/0001, the contents of which are incorporated herein by reference, with solenoid 41 controlling fuel flow to the injector while solenoid 42 is operable to feed pulses of air to atomise each fuel charge fed to valve 11.
  • solenoid 41 controlling fuel flow to the injector
  • solenoid 42 is operable to feed pulses of air to atomise each fuel charge fed to valve 11.
  • like parts are referenced by the same numerals as shown in Figures 1 and 2, as appropriate.

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

L'invention concerne un injecteur (10) de combustible permettant l'injection directe dans une chambre de combustion (31) qui comprend une soupape (11) orientée en position fermée afin d'obturer le passage entre la sortie de l'injecteur (10) et la chambre de combustion (31).Le combustible est alimenté par l'injecteur (10) le long d'un alésage longitudinal (18) de queue (20) de la soupape (11), à travers une pluralité d'alésages de cheminement (26), s'ouvrant sur un espace radial (27) étalé en gradin (28) entre la surface externe de la queue (20) et le siège (29) situé entre la queue (20) et le corps de la soupape (22). L'alésage longitudinal (18) possède des extensions en gradin (24, 25) en direction de la face de la soupape.
PCT/AU2000/000090 1999-02-11 2000-02-10 Introduction de combustible par injection directe WO2000047889A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU26499/00A AU2649900A (en) 1999-02-11 2000-02-10 Direct fuel injection introduction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPP8612 1999-02-11
AUPP8612A AUPP861299A0 (en) 1999-02-11 1999-02-11 Direct fuel injection

Publications (1)

Publication Number Publication Date
WO2000047889A1 true WO2000047889A1 (fr) 2000-08-17

Family

ID=3812813

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2000/000090 WO2000047889A1 (fr) 1999-02-11 2000-02-10 Introduction de combustible par injection directe

Country Status (2)

Country Link
AU (1) AUPP861299A0 (fr)
WO (1) WO2000047889A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004036035A1 (fr) * 2002-10-15 2004-04-29 J & J Prowork Oy Systeme d'alimentation en carburant

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982693A (en) * 1976-01-16 1976-09-28 General Motors Corporation Orifice plunger valve fuel injector
DE3151368A1 (de) * 1981-01-20 1982-08-05 Nissan Motor Co., Ltd., Yokohama, Kanagawa Brennstoff-einspritzvorrichtung
US4693424A (en) * 1985-07-15 1987-09-15 General Motors Corporation Poppet covered orifice fuel injection nozzle
US4909444A (en) * 1988-10-17 1990-03-20 General Motors Corporation Poppet covered orifice fuel injection nozzle
WO1996041685A1 (fr) * 1995-06-09 1996-12-27 Alan Patrick Casey Buse d'alimentation en un melange de liquide et de gaz
US5735468A (en) * 1992-10-13 1998-04-07 Casey; Alan Patrick Gas/liquid mixing apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982693A (en) * 1976-01-16 1976-09-28 General Motors Corporation Orifice plunger valve fuel injector
DE3151368A1 (de) * 1981-01-20 1982-08-05 Nissan Motor Co., Ltd., Yokohama, Kanagawa Brennstoff-einspritzvorrichtung
US4693424A (en) * 1985-07-15 1987-09-15 General Motors Corporation Poppet covered orifice fuel injection nozzle
US4909444A (en) * 1988-10-17 1990-03-20 General Motors Corporation Poppet covered orifice fuel injection nozzle
US5735468A (en) * 1992-10-13 1998-04-07 Casey; Alan Patrick Gas/liquid mixing apparatus
WO1996041685A1 (fr) * 1995-06-09 1996-12-27 Alan Patrick Casey Buse d'alimentation en un melange de liquide et de gaz

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004036035A1 (fr) * 2002-10-15 2004-04-29 J & J Prowork Oy Systeme d'alimentation en carburant

Also Published As

Publication number Publication date
AUPP861299A0 (en) 1999-03-04

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