US3727590A - Fuel supply systems for fourstroke internal combustion engines - Google Patents

Fuel supply systems for fourstroke internal combustion engines Download PDF

Info

Publication number
US3727590A
US3727590A US00058852A US3727590DA US3727590A US 3727590 A US3727590 A US 3727590A US 00058852 A US00058852 A US 00058852A US 3727590D A US3727590D A US 3727590DA US 3727590 A US3727590 A US 3727590A
Authority
US
United States
Prior art keywords
engine
receiver
fuel
cycle
intake pipe
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US00058852A
Other languages
English (en)
Inventor
A Mennesson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe Industrielle de Brevets et dEtudes SIBE
Original Assignee
Societe Industrielle de Brevets et dEtudes SIBE
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 Societe Industrielle de Brevets et dEtudes SIBE filed Critical Societe Industrielle de Brevets et dEtudes SIBE
Application granted granted Critical
Publication of US3727590A publication Critical patent/US3727590A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/02—Fuel-injection apparatus characterised by being operated electrically specially for low-pressure fuel-injection
    • 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
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four

Definitions

  • ABSTRACT Goodridge Assistant Examiner-Cort Flint Atl0rneyFleit, Gipple & Jacobson
  • the system enables the supply of fuel to a four-stroke internal combustion engine comprising two pairs of cylinders in each pair of which the cycles of the two cylinders are separated by 360 of rotation of the engine shaft. It includes four injection valves actuated by electromagnets controlled by an actuating device driven by a shaft at half the speed of the engine shaft. It is arranged so that each cylinder of each pair receives on each cycle two doses of fuel for periods of equal duration separated by 360 of rotation of the engine shaft.
  • the invention relates to fuel supply systems for fourstroke internal combustion engines of the type comprising at least one pair of combustion chambers whose respective cycles of operation are displaced by 360 of rotation of the engine shaft, these combustion chambers being of the cylinder-piston type or of any other variable volume chamber type.
  • a main air intake pipe supplying individual air intake pipes connected respectively to each combustion chamber of the engine, the abovesaid main intake pipe being equipped with main throttle member actuated by the operator and an auxiliary throttle member, situated upstream of this main throttle member, opening automatically and progressively in proportion as the flow of air in themain intake pipe increases,
  • a fuel metering system sensitive to the position of the auxiliary throttle member and adapted to adjust the total flow of fuel injected per cycle of operation of the engine in such a way that the richness of the air fuel mixture formed in the individual intake pipes is substantially constant, at least for certain conditions of operation of the engine.
  • An engine cycle is the time required for all the combustion chambers to complete one respective cycle of operation and corresponds to two complete revolutions of the engine shaft (720).
  • a dose is the full charge of fuel required for the firing of one combustion chamber during one cycle of operation of the chamber, a half-dose being one half of the full charge.
  • the fuel supply system intended for the supply of a four stroke internal combustion engine comprising at least one pair of combustion chambers whose respective cycles of operation are phase-shifted by 360, comprises, individual intake pipes associated respectively with each combustion chamber, obturator means with intermittent action provided for each individual intake pipe and enabling, when they are actuated, the introduction of fuel under pressure into the corresponding individual air intake pipe, and lastly, a control device adapted to ensure cyclic actuation of the abovesaid obturator means in synchronism with the rotation of the engine shaft, the
  • the abovesaid control device is arranged so that the obturator means with intermittent action associated respectively with each of the combustion chambers of the pair of the combustion chambers concerned are actuated simultaneously, on each cycle of the engine, during two periods of equal duration displaced by 360 in the said cycle, so that the supply of fuel to the individual intake pipe of each combustion chamber is provided at the rate of two half-doses per cycle equal and displaced by 360.
  • the simultaneous introduction of two other half-doses will intervene with a phase shift of 360, ie at a period when, on the one hand, the first combustion chamber is in the phase that the second combustion chamber was in on the introduction of the previous two half-doses, and, on the other hand, the second combustion chamber is in the phase that the first combustion chamber was in on the introduction of the previous two half-doses.
  • each pair of combustion chambers has to be supplied, as has just been stated,
  • control device comprising n distinct active members displaced angularly by l80/n, assuming that this control device is a rotary device which has to ensure in one revolution thereof the supply of the engine with fuel during one cycle.
  • FIG. 1 of these drawings shows, in very diagrammatic manner, a four cylinder internal combustion engine supplied with fuel by a system according to the invention.
  • FIG. 2 is a diagram illustrating the operation of the supply system shown in diagrammatic manner in FIG. 1.
  • FIGS. 3 and 4 lastly, show, respectively, in elevation and in transverse section along the broken line IVIV of FIG. 3, a particular embodiment of the control system of the abovesaid supply device.
  • FIG. 1 a type of four stroke internal combustion engine for which a fuel supply system according to the invention is particularly advantageous by reason of the total symmetry which it permits during the process of supply, which symmetry is manifested by a greater regularity of speed and by less fatigue in the moving parts of the engine.
  • This engine comprises four cylinders, or more precisely two pairs of cylinders la and 1b, on one hand, and 2a and 2b, on the other hand, the two cylinders ofa same pair having respective operating cycles displaced by 360 and the two pairs of cylinders being displaced with respect to one another by half. a revolution of the crankshaft.
  • the period of the combined operating cycles of the two pairs of chambers corresponds to two revolutions of the engine shaft.
  • the configuration shown in FIG. 1 corresponds to the case where the cylinder 1a is at the start of its intake stroke and the cylinder 1b is at the start of its expansion stroke, while the cylinder 2a is at the beginning of its compression stroke and the cylinder 2b at the beginning ofits exhaust stroke.
  • a main air intake pipe 3 feeding with air individual intake pipes 4 associated respectively with each of the cylinders la, Ih, 20, 2b, the abovesaid main intake pipe 3 being equipped with a main throttle member 5, such as a butterfly valve, actuated by the operator, and an auxiliary throttle member 6, advantageously also ofthe butterfly valve type, situated upstream of the main throttle member 5 and governed by control means 7 (which will be more explicitly described below) causing progressive opening of the said auxiliary throttle member when the flow of air in the abovesaid main intake pipe increases,
  • a main throttle member 5 such as a butterfly valve, actuated by the operator
  • auxiliary throttle member 6 advantageously also ofthe butterfly valve type
  • means for injecting under pressure liquid fuel into each of the individual air intake pipes 4 these means beingable to be constituted by connecting a source of liquid fuel under pressure (not shown) to four obturator means, such as injection valves 101a, 101b, 102a, 102b opening respectively inside the four individual pipes 4 serving the cylinders la, 1b, 2a and 2b with air, the abovesaid valves being actuated respectively by eleetromagnets 201a, 201b, 202a and 20217 causing the opening of the corresponding injection valve when they are energized,
  • control apparatus 8 adapted to ensure the energizing of the abovesaid electromagnets according to a predetermined law which will be considered below with regard to the main feature 'of the invention, the abovesaid control apparatus 8 being moved by a rotary shaft 9 driven in continuous rotation by the engine at half the speed of said engine.
  • the control apparatus 8 is arranged in such a way that,
  • the electromagnets 201a,-20lb are energized simultaneously, on each cycle of the engine, for two periods of equal duration F a and P 1; displaced by 360 in the cycle of this pair of cylinders,
  • the electromagnets 202a, 2025 are energized simultaneously, on each cycle of the engine, for two periods of equal duration P a and P b coinciding with Pa and Pb respectively and displaced also by 360 in the cycle of this pair of cylinders.
  • FIG. 2 illustrates in eloquent manner the total symmetry of the injection system according to the invention.
  • a second control system similar to the previous one, comprising a second U-shaped part 18 (visible in FIG.
  • the wings of the U-shaped part 18 bear, as in the case of the U-shaped part 11, an electric lamp 21 coacting with a photo diode.
  • An electronic control circuit similar to the circuit 17 serves for the control of the electromagnets 202a and 202b associated with the second pair of cylinders 2a, 2b having respective cycles displaced by 360.
  • a second aperture 22 (identical with the aperture 16 but displaced by l80 with respect to the latter).
  • control means 7 of the angular position of the auxiliary butterfly valve 6 these are advantageously constituted, as shown in FIG. 4.
  • the axle 10 of the said auxiliary butterfly valve is coupled through a crank 23, to a rod 24 fixed to the center of a diaphragm 25, a return spring 26 urging this assembly towards the closed position of the abovesaid auxiliary butterfly valve.
  • the volume 28, comprised between a casing 29 and the outer surface of the diaphragm 25, is made to communicate through a passage partially shown at 27 in FIG. 3, with the space of the pipe 3 comprised between the butterfly valves 5 and 6.
  • Such a control apparatus for the injection periods operates according to a cycle which is effectively that explained by the diagram of FIG. 2 regarding the main feature of the invention.
  • the invention is in no way limited to those of its methods of application, nor to those of its methods of production of its various parts, which have been more particularly considered.
  • Fuel supply system for a four-stroke internal combustion engine having an engine shaft which revolves twice in each engine cycle, at least one pair of com,- bustion chambers, whose respective operating cycles are separated by 360 of revolution of the engine shaft, said device comprising individual air intake pipes connected to each respective combustion chamber, each chamber having a valved inlet connected to an individual intake pipe and a valved outlet, a source of fuel under pressure, obturator means with intermittent action provided at each individual air intake pipe and arranged to enable when they are actuated, the introduction of said fuel into the corresponding individual air intake pipe, and a control device adapted to ensure cyclic actuation of said obturator means phase-coupled to the rotation of the engine shaft, said control device being arranged so that the obturator means for each combustion chamberof said pair of combustion chambers are actuated simultaneously, in each said engine cycle, during two equal periods displaced by 360 in said engine cycle, so that each combustion chamber of each pair is supplied.
  • the obturator means comprise injection valves actuated by electromagnets, an electronic device governing said electromagnets and actuated by a rotary member comprising emitter/detector means adapted to emit, towards a nonrotary receiver, a flux of energy during a fraction of a revolution of said rotary member whose value varies as a function of the relative position of said rotary member and of said receiver,
  • said receiver is responsive to the energy flux and has two states, namely a state corresponding to reception of flux and a state corresponding to nonreception of flux, and said receiver is arranged to control the energization circuit of said electromagnet according to the state of said receiver, and auxiliary throttle means for modifying the relative position of said rotary member and of said receiver as a function of the air flow rate in the air intake pipe of the engine, said emitter/detector intervening during two periods of equal duration separated by 360 for each operating cycle of the respective chamber.
  • Fuel supply system for a four-stroke internal combustion engine having an engine shaft which revolves twice in each engine cycle, at least one pair of combustion chambers, whose respective operating cycles are separated by 360 of revolution of the engine shaft, said device comprising individual air intake pipes connected to each respective combustion chamber, each chamber having a valved inlet connected to an individual intake pipe and a' valved outlet, a source of fuel under pressure, obturator means with intermittent action provided at each individual air intake pipe and arranged to enable, when they are actuated, the introduction of said fuel into the corresponding individual air intake pipe, and a control device adapted to ensure cyclic actuation of said obturator means phase-coupled to the rotation of the engine shaft, said control device being arranged so that the obturator means for each combustion chamber of said pair of combustion chambers are actuated simultaneously, in each said engine cycle, during two equal periods displaced by 360 in said engine cycle, so that each combustion chamber of each pair is supplied with fuel in two half-doses per respective operating cycle, wherein said engine has
  • said receiver is responsive to the energy flux and has two states, namely a state corresponding to reception of flux and a state corresponding to nonreception of flux, and said receiver is arranged to control the energization circuit of said electromagnet according to the state of said receiver, and auxiliary throttle means for modifying the relative position of said rotary member and of said receiver as a function of the air flow rate in the air intake pipe of the engine, said emitter/detector intervening during two periods of equal duration separated by 360 for each operating cycle of the respective chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Fuel-Injection Apparatus (AREA)
US00058852A 1969-07-31 1970-07-28 Fuel supply systems for fourstroke internal combustion engines Expired - Lifetime US3727590A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6926308A FR2050378A1 (enrdf_load_stackoverflow) 1969-07-31 1969-07-31

Publications (1)

Publication Number Publication Date
US3727590A true US3727590A (en) 1973-04-17

Family

ID=9038399

Family Applications (1)

Application Number Title Priority Date Filing Date
US00058852A Expired - Lifetime US3727590A (en) 1969-07-31 1970-07-28 Fuel supply systems for fourstroke internal combustion engines

Country Status (5)

Country Link
US (1) US3727590A (enrdf_load_stackoverflow)
DE (1) DE2032620C3 (enrdf_load_stackoverflow)
ES (1) ES382137A1 (enrdf_load_stackoverflow)
FR (1) FR2050378A1 (enrdf_load_stackoverflow)
GB (1) GB1315186A (enrdf_load_stackoverflow)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2974657A (en) * 1958-11-25 1961-03-14 Bessiere Pierre Etienne Fuel injection device for a multicylinder internal combustion engine
US3014466A (en) * 1958-12-03 1961-12-26 Inst Francais Du Petrole New device for carrying out the double injection method in internal combustion engines
US3054393A (en) * 1954-07-27 1962-09-18 Fritz A F Schmidt Fuel injection system
US3203410A (en) * 1963-10-04 1965-08-31 Bosch Gmbh Robert Electrically controlled fuel injection system
US3216407A (en) * 1962-05-09 1965-11-09 Inst Francais Du Petrole Injection device, particularly adapted for carrying out the double injection method in internal combustion engines
US3338221A (en) * 1964-01-11 1967-08-29 Bosch Gmbh Robert Electrical control device
US3430616A (en) * 1966-11-11 1969-03-04 Bosch Gmbh Robert Fuel injection control system
US3439655A (en) * 1965-11-09 1969-04-22 Inst Francais Du Petrole Double injection apparatus for a compression ignition motor
US3460520A (en) * 1966-04-14 1969-08-12 Sopromi Soc Proc Modern Inject Fuel injection system for internalcombustion engines
US3483851A (en) * 1966-11-25 1969-12-16 Bosch Gmbh Robert Fuel injection control system
US3543739A (en) * 1967-10-11 1970-12-01 Brev Etudes S I B E De Fuel feed device for an internal combustion engine
US3548791A (en) * 1968-07-08 1970-12-22 Gillett Tool Co Precision fuel metering system having operational mode change during transient intervals

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3054393A (en) * 1954-07-27 1962-09-18 Fritz A F Schmidt Fuel injection system
US2974657A (en) * 1958-11-25 1961-03-14 Bessiere Pierre Etienne Fuel injection device for a multicylinder internal combustion engine
US3014466A (en) * 1958-12-03 1961-12-26 Inst Francais Du Petrole New device for carrying out the double injection method in internal combustion engines
US3216407A (en) * 1962-05-09 1965-11-09 Inst Francais Du Petrole Injection device, particularly adapted for carrying out the double injection method in internal combustion engines
US3203410A (en) * 1963-10-04 1965-08-31 Bosch Gmbh Robert Electrically controlled fuel injection system
US3338221A (en) * 1964-01-11 1967-08-29 Bosch Gmbh Robert Electrical control device
US3439655A (en) * 1965-11-09 1969-04-22 Inst Francais Du Petrole Double injection apparatus for a compression ignition motor
US3460520A (en) * 1966-04-14 1969-08-12 Sopromi Soc Proc Modern Inject Fuel injection system for internalcombustion engines
US3430616A (en) * 1966-11-11 1969-03-04 Bosch Gmbh Robert Fuel injection control system
US3483851A (en) * 1966-11-25 1969-12-16 Bosch Gmbh Robert Fuel injection control system
US3543739A (en) * 1967-10-11 1970-12-01 Brev Etudes S I B E De Fuel feed device for an internal combustion engine
US3548791A (en) * 1968-07-08 1970-12-22 Gillett Tool Co Precision fuel metering system having operational mode change during transient intervals

Also Published As

Publication number Publication date
GB1315186A (en) 1973-04-26
DE2032620A1 (de) 1971-02-11
ES382137A1 (es) 1972-11-01
DE2032620C3 (de) 1974-05-30
FR2050378A1 (enrdf_load_stackoverflow) 1971-04-02

Similar Documents

Publication Publication Date Title
US3742918A (en) Electronically controlled fuel-supply system for compression-ignition engine
US3824965A (en) Fuel system
US3460520A (en) Fuel injection system for internalcombustion engines
US3314406A (en) Liquid fuel pumping apparatus for internal combustion engines
US3727590A (en) Fuel supply systems for fourstroke internal combustion engines
US2827030A (en) Fuel injection means for internal combustion engines
US3094976A (en) Automotive device
US2001843A (en) Fuel injection system for internal combustion engines
US3614944A (en) Engine apparatus
US2699156A (en) Multiple piston internal-combustion engine
US3835825A (en) Internal combustion engines
US3990408A (en) Water injection system for internal combustion engines
US3839998A (en) Fuel injection apparatus for internal combustion engines
US1365301A (en) Means for controlling the supply of liquid fuel to internal-combustion engines
US2933073A (en) Direct gasoline injection system
US2535535A (en) Injection plunger for compression ignition engines
US3267921A (en) Fuel injection for internal combustion engines
US1907696A (en) Internal combustion engine
GB1487813A (en) Fuel injection apparatus for internal combustion engines
US2977947A (en) Fuel injection system
US2053057A (en) Internal combustion engine
US3777726A (en) Fuel injection apparatus
USRE18429E (en) Fuel injection engine
US2893711A (en) Charge forming means
US3721219A (en) Fuel feed devices for internal combustion engines