WO1997047872A1 - Systeme d'injection de carburant gazeux - Google Patents

Systeme d'injection de carburant gazeux Download PDF

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Publication number
WO1997047872A1
WO1997047872A1 PCT/AU1996/000349 AU9600349W WO9747872A1 WO 1997047872 A1 WO1997047872 A1 WO 1997047872A1 AU 9600349 W AU9600349 W AU 9600349W WO 9747872 A1 WO9747872 A1 WO 9747872A1
Authority
WO
WIPO (PCT)
Prior art keywords
lpg
lubricant
fuel
engine
venturi
Prior art date
Application number
PCT/AU1996/000349
Other languages
English (en)
Inventor
William Michael Lynch
Original Assignee
William Michael Lynch
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 William Michael Lynch filed Critical William Michael Lynch
Priority to PCT/AU1996/000349 priority Critical patent/WO1997047872A1/fr
Priority to AU58881/96A priority patent/AU5888196A/en
Publication of WO1997047872A1 publication Critical patent/WO1997047872A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M3/00—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture
    • F01M3/02—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture with variable proportion of lubricant to fuel, lubricant to air, or lubricant to fuel-air-mixture
    • 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
    • F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
    • F02D19/021—Control of components of the fuel supply system
    • F02D19/022—Control of components of the fuel supply system to adjust the fuel pressure, temperature or composition
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0209—Hydrocarbon fuels, e.g. methane or acetylene
    • F02M21/0212—Hydrocarbon fuels, e.g. methane or acetylene comprising at least 3 C-Atoms, e.g. liquefied petroleum gas [LPG], propane or butane
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/06—Apparatus for de-liquefying, e.g. by heating
    • 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
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
    • F02D19/021—Control of components of the fuel supply system
    • F02D19/023—Control of components of the fuel supply system to adjust the fuel mass or volume flow
    • F02D19/024—Control of components of the fuel supply system to adjust the fuel mass or volume flow by controlling fuel injectors
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • F02M21/0242—Shut-off valves; Check valves; Safety valves; Pressure relief valves
    • 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
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Definitions

  • This invention relates to an apparatus for injecting vaporised liquefied gas fuel into an internal combustion engine.
  • LPG liquefied petroleum gas
  • LPG liquefied natural gas
  • liquefied petroleum gas any other volatile gas or substance adapted to be used as a fuel for an internal combustion engine, which is gaseous at normal temperature and pressure, but which is stored in liquid form under pressure.
  • LPG-type fuels can be difficult.
  • the usual method involves mixing the gaseous fuel and air before introducing this mixture to the engine.
  • the invention provides a fuel injection apparatus adapted to be fitted to an internal combustion engine operated on LPG, said apparatus including a reservoir for LPG, said reservoir having an outlet connected via a pump and a non-return valve to a heating chamber and then via a gas pressure regulator to an injector, wherein, in operation, LPG is pumped by said pump through said non-return valve to said heating chamber, which heating chamber is adapted to heat said LPG to allow gaseous LPG to be transmitted to said injector once a predetermined pressure set on said regulator has been reached, whereupon said injector injects said gaseous LPG into the crankcase, transfer ports, carburettor or cylinders of said internal combustion engine.
  • said injector is actuated by combustion pressure from the engine or by a sensor responsive to engine speed, thereby ensuring delivery of fuel is regulated according to engine speed.
  • said heating chamber is heated by hot water or hot air.
  • the injector may be arranged to feed the gaseous LPG continuously or in any other manner as required by the particular type of engine and/or the fuel feed thereto.
  • lubricant When the engine is a two-stroke engine, lubricant must be injected into the engine along with the gaseous LPG.
  • the greater the amount of lubricant required - means are provided for automatically adjusting lubricant feed.
  • the rate of fuel flow to the engine may be used to regulate lubricant injection rate by drawing the lubricant into the fuel flow by use of the venturi effect.
  • the lubricant injecting means includes a constriction in a feed pipe for introducing the LPG to the engine, or in a by-pass stream drawn off from the feed pipe, said constriction forming a venturi, closely adjacent to which is at least one feed point for lubricant such that the reduction in pressure at the feed point or points caused by passage of gaseous LPG through the venturi sucks lubricant from a reservoir into the fuel stream in an amount dependent on the rate of fuel flow and on the engine speed.
  • the lubricant feed rate may be controlled over a wide range and to ensure adequate lubrication at all engine speeds without over- lubrication at low speed
  • At least two feed points can preferably be switched from operational to non-operational by engine speed controlled means for example, engine speed controlled valves.
  • a first feed point which may conveniently be termed a "low speed" feed point may be operational with the flow of lubricant therefrom being controlled both by the rate of flow of fuel through the venturi and by valve means, for example, needle valve means in the feed pipe connecting the feed point to the lubricant reservoir.
  • valve means for example, needle valve means in the feed pipe connecting the feed point to the lubricant reservoir.
  • the valve in the lubricant feed pipe may be opened further until the feed pipe is wholly unobstructed and operating at its maximum capacity.
  • a valve in a second lubricant feed pipe connecting a second "high speed" feed point to the lubricant reservoir may be opened to allow the introduction of further lubrication into the fuel stream.
  • both fuel pipes may be opened to their fullest extent and delivering lubricant at the limit of their carrying capacity.
  • the presence of engine speed controlled valves in the lubricant feed pipes provides for fine control of lubricant addition through the entire engine speed range.
  • the valves on the lubricant feed pipes are preferably computer controlled.
  • the lower speed lubricant feed point is preferably located near the wall of the fuel pipe and the high speed lubricant feed point is located centrally of the pipe.
  • the constriction forming the venturi may be created by a valve member in the fuel pipe which is operated in response to the engine speed or which itself controls engine speed.
  • the valve may, for example, comprise a speed controller, for example a throttle operated by the accelerator pedal or other throttle control. Where the valve is separate from the speed controller, it is preferably a rotary valve or a needle valve and this may be so whether the valve is present in the main fuel feed pipe or in a by-pass flow pipe. such a valve member is preferably controlled by computer to adjust fuel flow through the venturi.
  • a speed controller for example a throttle operated by the accelerator pedal or other throttle control.
  • the invention also provides a method of lubricating a two-stroke LPG engine wherein lubricating oil is introduced into a vaporised LPG stream and wherein the quantity of lubricating oil introduced is increased as the rate of flow of fuel to the engine increases, wherein the introduction of lubricating oil is controlled by the action of a venturi in the fuel pipe which draws lubricant from a lubricating oil reservoir in response to the reduction in pressure resulting from passage of fuel through the venturi.
  • the two-stroke engine lubricating arrangement can also be used with two- stroke engines other than LPG two-stroke engines and may for example comprise a unit for insertion into the fuel pipe of, for example, a two- stroke petrol or diesel engine.
  • the invention also provides a lubricant feed system for a two- stroke engine comprising a chamber that can be inserted into the fuel line of an engine, said chamber forming or enclosing a venturi through which the fuel passes and, downstream of said venturi, at least one lubricant feed point connected to a lubricant reservoir such that passage of fuel through the venturi draws lubricant from the reservoir to be entrained in the fuel an amount dependent on the ratio of fuel flow.
  • the construction of the lubricant feed apparatus may be generally as described hereinbefore.
  • Fig. 1 shows in schematic form an embodiment of a fuel injection system for an LPG-operated internal combustion engine in accordance with the present invention
  • Fig. 2 shows in schematic form an embodiment of a lubricating system in accordance with the present invention.
  • a pressurised fuel reservoir (1) is shown containing liquefied petroleum gas (LPG).
  • the pressure within the reservoir (1) is typically 826.8 kPa (120 psi).
  • Fuel is pumped from the reservoir (1) via a centrifugal pump (3) from reservoir outlet (4) to a heating chamber (6) via a non-return valve (5).
  • the heating chamber (6) has an inlet (7) and an outlet (8) to allow heated water to heat fuel line (9) within the heating chamber (6).
  • Fuel line (9) is connected to an injector (10) via gas pressure regulator (12).
  • a sensor (11) responsive to engine speed, activates the injector (10).
  • the pressure regulator (12) In operation, when using propane gas, the pressure regulator (12) is set to approximately 500 kPa when ambient temperature is approximately 10°C.
  • the injector typically injects 10 cm 3 to 20 cm 3 of gas per stroke when the engine is operating at 6,000 rpm.
  • Lubrication for the engine is provided in the case of two-stroke engines by oil injection and in the case of two-stroke engines by oil injection and in the case of four-stroke engines by provision of a wet sump.
  • the lubricant injecting apparatus (21) consists of a section of the feed pipe (22) in which are located a low speed lubricant feed point (23) and a high speed lubricant feed point (24). Gaseous fuel enters the pipe section (22) at (25) and leaves at (26). A rotary valve (27) is controlled by a computer (28).
  • the low speed feed point (23) is located near the wall of the pipe section (22) and the high speed feed point (24) is located in the central region of the fuel stream.
  • Feed points (23) are fed by lubricant feed tubes (32) and (33), respectively.
  • Feed points (23) and (24) and lubricant feed tubes (32) and (33) have a bore size in the range 50 to 100 micron and the ends (32) and (33) at feed points (23) and (24) are angled at 45° to the direction of gaseous fuel flow.
  • the rotary valve (27) restricts the diameter of the feed pipe (22) upstream of the lubricant feed points (23) and (24) and provides a venturi which draws lubricant from the reservoir (29) to feed points (23) and/or (24) at a flow rate dependent on the pressure drop provided by the venturi .
  • needle valves (30) and/or (31) located in tubes (32) and (33) respectively, near the low and high speed feed points (13) and (14).
  • the needle valves (30), (31) may also be controlled by computer (28).
  • the lubricant injecting apparatus (21) may be located in the fuel or fuel/air stream at any location where there is a suitable flow before the fuel enters the combustion chamber of the engine.
  • valve (30) is gradually opened as more and more oil is required.
  • the valve (31) is opened, gradually actuating the high speed feed point (24), thereby increasing the amount of lubrication to the engine.
  • the low speed feed may be adjusted so that both feed points (23) and (24) are feeding lubricant at the same or substantially the same rate.
  • lubricant lubricating oil or oil
  • oil include oil diluted with diluents that includes liquid fuels. Indeed, the reduction in viscosity achieved by such dilution may ne advantageous is aiding atomisation.
  • Needle valves (30, 31) are adjusted to regulate the amount of oil being injected into the fuel or fuel/air stream over the speed range of the engine by controlling whether the lubricant enters from one or other or both fuels points (23, 24). However, other adjusting means may be used to regulate this flow.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

La présente invention concerne un procédé et un appareil d'injection de carburant gazeux, destiné à être utilisé avec un moteur à combustion interne fonctionnant au G.P.L. Ledit appareil comprend un réservoir (1) de G.P.L. muni d'une sortie (9) relié, via une pompe (3) et un clapet de non-retour (5), à une chambre de chauffage (6) chauffée de préférence par air chaud ou par eau chaude, et à un injecteur (10) via un détenteur-régulateur de gaz (12). L'appareil fonctionne de telle manière que le G.P.L. est pompé par la pompe (3) au travers du clapet de non-retour (5) vers la chambre de chauffage (6), où le G.P.L. est chauffé de manière que le G.P.L. gazeux est transmis à l'injecteur (10) dès qu'une pression prédéterminée fixée sur le détenteur-régulateur (12) est atteinte, l'injecteur (10) injectant alors le G.P.L. dans le carter, les lumières de transfert, le carburateur ou les cylindres du moteur à combustion interne. Le moteur à combustion interne peut être un moteur à deux temps, et le lubrifiant peut être injecté dans le moteur en même temps que le G.P.L. gazeux à l'aide de moyens d'injection de lubrifiant agencés de façon à adapter la quantité de lubrifiant à la vitesse du moteur, de préférence en aspirant le lubrifiant dans l'écoulement de carburant par effet venturi.
PCT/AU1996/000349 1996-06-07 1996-06-07 Systeme d'injection de carburant gazeux WO1997047872A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/AU1996/000349 WO1997047872A1 (fr) 1996-06-07 1996-06-07 Systeme d'injection de carburant gazeux
AU58881/96A AU5888196A (en) 1996-06-07 1996-06-07 Gaseous fuel injection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/AU1996/000349 WO1997047872A1 (fr) 1996-06-07 1996-06-07 Systeme d'injection de carburant gazeux

Publications (1)

Publication Number Publication Date
WO1997047872A1 true WO1997047872A1 (fr) 1997-12-18

Family

ID=3764280

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1996/000349 WO1997047872A1 (fr) 1996-06-07 1996-06-07 Systeme d'injection de carburant gazeux

Country Status (2)

Country Link
AU (1) AU5888196A (fr)
WO (1) WO1997047872A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000014389A1 (fr) * 1998-09-03 2000-03-16 The Ecological Engine Company Limited Distribution de lubrifiant pour un moteur deux-temps fonctionnant au gaz liquefie
EP1013901A1 (fr) * 1998-12-22 2000-06-28 Officine Lovato S.P.A. Dispositif indépendant de lubrification
FR2801643A1 (fr) * 1999-11-29 2001-06-01 Gennaro Antoine Di Dispositif de detente de gaz liquefie a element de vaporisation separe
WO2002050416A1 (fr) * 2000-12-20 2002-06-27 Antoine Di Gennaro Dispositif de detente de gas liquefie a element de vaporisation separe
EP1350145A1 (fr) * 2000-08-18 2003-10-08 Dynetek Industries Ltd Regulateur de pression
EP3913210A1 (fr) * 2020-05-18 2021-11-24 Delphi Automotive Systems Luxembourg SA Système de distribution de carburant gazeux pour un moteur à combustion interne

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU555598B2 (en) * 1982-02-11 1986-10-02 Robert Bosch Gmbh Supplying liqiud fuel gas to an internal combustion engine
WO1987000245A1 (fr) * 1985-07-04 1987-01-15 Keewest Developments Limited Systeme de combustible pour moteur a combustion interne
US5483943A (en) * 1994-09-19 1996-01-16 Ford Motor Company Gaseous fuel supply module for automotive internal combustion engine
US5499615A (en) * 1994-10-28 1996-03-19 Caterpillar Inc. Direct injection propane fuel system for diesel engine applications

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU555598B2 (en) * 1982-02-11 1986-10-02 Robert Bosch Gmbh Supplying liqiud fuel gas to an internal combustion engine
WO1987000245A1 (fr) * 1985-07-04 1987-01-15 Keewest Developments Limited Systeme de combustible pour moteur a combustion interne
US5483943A (en) * 1994-09-19 1996-01-16 Ford Motor Company Gaseous fuel supply module for automotive internal combustion engine
US5499615A (en) * 1994-10-28 1996-03-19 Caterpillar Inc. Direct injection propane fuel system for diesel engine applications

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DERWENT ABSTRACT, Accession No. 94-277947/34, Class Q53; & SU,A,2 008 493 (UNIV SAMARA AEROCOSMIC INST), 28 February 1994. *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000014389A1 (fr) * 1998-09-03 2000-03-16 The Ecological Engine Company Limited Distribution de lubrifiant pour un moteur deux-temps fonctionnant au gaz liquefie
EP1013901A1 (fr) * 1998-12-22 2000-06-28 Officine Lovato S.P.A. Dispositif indépendant de lubrification
FR2801643A1 (fr) * 1999-11-29 2001-06-01 Gennaro Antoine Di Dispositif de detente de gaz liquefie a element de vaporisation separe
EP1350145A1 (fr) * 2000-08-18 2003-10-08 Dynetek Industries Ltd Regulateur de pression
EP1350145A4 (fr) * 2000-08-18 2004-05-19 Dynetek Ind Ltd Regulateur de pression
WO2002050416A1 (fr) * 2000-12-20 2002-06-27 Antoine Di Gennaro Dispositif de detente de gas liquefie a element de vaporisation separe
US7128060B2 (en) 2000-12-20 2006-10-31 Antoine Di Gennaro Device for expanding liquefied gas with separate vaporizing element
EP3913210A1 (fr) * 2020-05-18 2021-11-24 Delphi Automotive Systems Luxembourg SA Système de distribution de carburant gazeux pour un moteur à combustion interne

Also Published As

Publication number Publication date
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