US3688756A - Fuel feed devices for internal engines - Google Patents

Fuel feed devices for internal engines Download PDF

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Publication number
US3688756A
US3688756A US133009A US3688756DA US3688756A US 3688756 A US3688756 A US 3688756A US 133009 A US133009 A US 133009A US 3688756D A US3688756D A US 3688756DA US 3688756 A US3688756 A US 3688756A
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United States
Prior art keywords
fuel
pipe
intake pipe
throttle
valve
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
US133009A
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English (en)
Inventor
Gaston Arnaud
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Societe Industrielle de Brevets et dEtudes SIBE
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Societe Industrielle de Brevets et dEtudes SIBE
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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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/30—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines
    • F02M69/36—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines having an enrichment mechanism modifying fuel flow to injectors, e.g. by acting on the fuel metering device or on the valves throttling fuel passages to injection nozzles or overflow passages
    • F02M69/40—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines having an enrichment mechanism modifying fuel flow to injectors, e.g. by acting on the fuel metering device or on the valves throttling fuel passages to injection nozzles or overflow passages using variably controlled air pressure, e.g. by modifying the intake air vacuum signal acting on the fuel metering device
    • 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
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • 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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/43—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel
    • F02M2700/4302—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel whereby air and fuel are sucked into the mixture conduit
    • F02M2700/4392—Conduits, manifolds, as far as heating and cooling if not concerned; Arrangements for removing condensed fuel

Definitions

  • the metering system consists of a rotating member controlling the current to the electromagnet so as to open the injector over only a fraction of each turn, this fraction varying directly as the opening of the auxiliary throttle.
  • a pressure regulator on the delivery pipe of the fuel pump has a discharge valve which opens under the efl'ect of the delivery pressure and closes under the effect of suction in the intake pipe between the two throttles.
  • the discharge valve is coupled to a diaphragm to which the suction is transmitted by a linking channel, which has a choke to ensure smaller flow from the intake pipe to the diaphragm than in the reverse direction.
  • the invention relates to fuel feed devices, for internal combustion engines, of the type of those which comprise, on one hand, in their intake pipe, upstream of a principal throttle member actuated by the driver, an auxiliary throttle member which opens automatically and progressively in proportion as the flow of air in the said pipe increases, on the other hand, means for injecting under pressure liquid fuel into that portion of this pipe situated downstream of the main throttle member and, on the other hand lastly, a metering system sensitive to the position of the auxiliary throttle member and adapted to regulate the flow of injected fuel in such a way that the richness of the air/fuel mixture passing into the intake pipe is substantially constant, at least for certain conditions of operation of the engine, the abovesaid injection means being constituted by a source of fuel under pressure of which the delivery circuit opening into the above-said portion of the intake pipe is controlled by at least
  • the invention relates more particularly to those devices of the type concerned which have been described in US. Pat. No. 3,543,739 of Oct. 9, 1968 to Andre Louis Mennesson and of which the abovesaid metering system comprises a member driven in continuous rotation and capable, by acting on the energization of the electromagnet, of determining over a fraction only of each of its revolutions the opening of the valve, this system being arranged so that it increases or decreases the said fraction in proportion as the opening of the auxiliary throttle member increases or decreases respectively.
  • the invention relates more particularly again to those devices of the type concerned of which the source of fuel under pressure is constituted by a fuel pump on the delivery pipe of which acts a pressure regulator which comprises a discharge valve tending to open under the effect of the delivery pressure of the pump and to close under the effect of the suction existin g in the zone of the intake pipe comprised between its two throttle members, which suction is transmitted through a linking channel on to a diaphragm to which the discharge valve is coupled.
  • the position of the auxiliary throttle member is characteristic of the flow of air passing from upstream to downstream of this member. If the volume of the portion of the intake pipe comprised between the intake valves of the internal combustion engine and the main throttle member is considerable with respect to the stroke volume of the engine, the flow of air measured by the auxiliary throttle member is not strictly equal, at transient speeds (acceleration or deceleration), to that which is in fact absorbed by the engine at the same moment. t
  • the flow of air measured by the auxiliary throttle member drops rapidly through the closing of the main throttle me e n e r and. until heestah ishrnentg poor, the operation of the engine then no longer being satisfactory.
  • the feed device of the type defined above is characterized by the fact that on the abovesaid linking channel are arranged throttle means ensuring a smaller flow cross-section in the sense going from the abovesaid zone of the intake pipe to the diaphragm of the pressure regulator than in the reverse direction.
  • FIG. 1 shows in diagrammatic elevation with portions in cross-section one embodiment of a fuel feed device constructed according to the invention
  • FIG. 2 shows a section of the embodiment of FIG. 1 along the line 11-11.
  • the device As regards the device as a whole, it is constituted in any suitable manner such that it comprises:
  • the auxiliary throttle member 3 is constituted by a butterfly valve keyed on an axle 4.
  • This valve is actuated by a pneumatic device comprising a diaphragm 5 separating two chambers 6 and 7 from one another.
  • the chamber 6 is connected by a channel 8 to a chamber 9 constituted by the zone of the pipe 1 which is comprised between the main throttle member 2 and the valve 3.
  • the axle 4 is rigidly fixed to a lever 10, provided at its free end, with a pin 11 which cooperates with the end of a rod 12, which is connected to the diaphragm 5.
  • a spring 13 tends constantly to close the valve 3 against the action of the suction transmitted into the chamber 6.
  • the chamber 7 is placed at atmospheric pressure through a channel 14 starting preferably from the air intake 15 of the pipe 1.
  • valve 3 the angular position taken up at any moment inside the pipe 1 by the valve 3 corresponds to the flow of air which flow in this pipe.
  • the valve 3 could be replaced by equivalent throttle members, of which examples have been described in the above-said patent.
  • injection means are constituted by a source of fuel under pressure which will be described in more detail below and of which the delivery circuit opening into the pipe 1 downstream of the main throttle member 2 is controlled by at least one valve 16 actuated by an electromagnet 17.
  • the metering system is made to include a flat and opaque disc 18 which is borne by a shaft 19, connected preferably to the internal combustion engine (not shown) supplied by the device, so that the disc is driven in continuous rotation around an axis perpendicular to its plane.
  • the disc 18 is interposed between a radiation or light source 20 and a radiation receiver such as a photodiode or photoelectric cell 21, home by a common support 22 connected to the auxiliary throttle member 3 and it is pierced by at least one window 23 adapted to allow the radiation beam emerging from the source 20 to arrive at the cell 21.
  • the cell 21 is arranged to actuate the energization of the electromagnet 17 according as it is irradiated or not and the assembly is such that the electromagnet is energized over a fraction of each of the revolutions of the disc 18 which varies in the same sense as the degree of opening of the throttle member 3.
  • the radiation source 20 can be constituted by a lamp which is adapted to be supplied by a battery 24 as soon as the ignition contact 25 of the engine is closed and which is arranged in a hollow boss 26 pierced by a hole. This hole is oriented in such a way as to direct a light beam on to the cell 21, through a hole passing through a hollow boss 27 where the said cell is housed.
  • the bosses 26 and 27 are carried by the ends of the U-support 22 which straddles the disc 18 so that the source 20 and the cell 21 are on opposite iatfi'r'ih disc and which is rigidly fixed to the axle 4, the latter being parallel to the shaft 19 as well as to the light beam received by the cell 21.
  • an amplifying relay 28 To utilize the currents generated in the cell 21, there may be inserted between the latter and the electromagnet 17, an amplifying relay 28.
  • the throttle member 3 opens thereby driving the support 22 in the direction which brings the bosses 26 and 27 closer to the shaft 19.
  • Each of the positions of the bosses corresponds to adifferent radius of the disc 18.
  • each window 23 has been determined so that the fraction of a turn during which it allows the light ray from the source 20 to pass towards the cell 21 (creation of a current in the conductor 31) increases in proportion as the latter elements 20, 21 approach the shaft 19, it is ensured that the flow of fuel delivered by each injection valve 16 varies in the same sense as the flow of air in the pipe 1.
  • the source of fuel under pressure is constituted by a fuel pump of which the suction pipe 51 dips into a fuel reservoir 52 and on the delivery pipe 53 of which acts a pressure regulator 54.
  • the latter comprises a discharge valve 55 tending to open under the effect of the delivery pressure of the pump and to close under the effect of the suction existing in the chamber 9, which suction is transmitted through a linking channel 56 onto a diaphragm 57 to which the val ve 55 is coupledby a rod 58.
  • the valve 55 cooperates with a seat 59 which constitutes the outlet from a chamber 60 connected through a by-pass linking channel 61 to the delivery pipe 53.
  • the linking channel 56 ends at a variable volume chamber 62 limited by one face of the diaphragm, the other face being placed at atmospheric pressure, for example through an orifice 63.
  • the assembly is such that the valve 55 opens as soon as the pressure in the pipe 53 exceeds a value determined by the surface of the diaphragm 57 and by the suction exerted on the latter.
  • throttle means 65 ensuring a flow section s maller in the direction a (FIG. 1) going from the chamber 9 to the chamber 62 limited by the diaphragm 57 than in reverse direction (direction b).
  • the throttle means 65 are constituted by two calibrated orifices 66a and 66b, mounted respectively in the two parallel branches 56a and 56b of the linking channel 56, and by a nonretfinvalve 67uiied bya spring 68, which valve is arranged in series with one (66b) of the calibrated orifices and arranged to allow air to pass in the second above-indicated direction (direction b).
  • Fuel feed device for an internal combustion engine, which comprises, in its intake pipe upstream of a main throttle member actuated by the driver, an auxiliary throttle member which opens automatically and progressively in proportion as the flow of air in the said pipe increases, means for injecting liquid fuel under pressure into that portion of said pipe situated downstream of the main throttle member, and a metering system sensitive to the position of the auxiliary throttle member and adapted to regulate the flow of fuel injected in such a way that the richness of the air/fuel mixture passing into the intake pipe is substantially constant, at least for certain operational conditions of the engine, said injection means being constituted by a source of fuel under pressure of which the delivery circuit opening into said portion of the intake pipe is controlled by at least one valve actuated by an electromagnet, the metering system comprising a member driven in continuous rotary movement and capable, by acting on the energization of the electromagnet, of determining over a fraction only of each of its turns the opening of the valve, said system being arranged so that it increases and decreases said fraction in proportion as the
  • throttle means are constituted by two calibrated orifices, mounted respectively in two parallel branches of the linking pipe, and by a non-return valve arranged in series with one of the calibrated orifices and arranged to allow air to pass in said reverse direction.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
US133009A 1970-04-30 1971-04-12 Fuel feed devices for internal engines Expired - Lifetime US3688756A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7016102A FR2092974A6 (enrdf_load_stackoverflow) 1970-04-30 1970-04-30

Publications (1)

Publication Number Publication Date
US3688756A true US3688756A (en) 1972-09-05

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US133009A Expired - Lifetime US3688756A (en) 1970-04-30 1971-04-12 Fuel feed devices for internal engines

Country Status (8)

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US (1) US3688756A (enrdf_load_stackoverflow)
BR (1) BR7101971D0 (enrdf_load_stackoverflow)
DE (1) DE2108069A1 (enrdf_load_stackoverflow)
ES (1) ES388925A2 (enrdf_load_stackoverflow)
FR (1) FR2092974A6 (enrdf_load_stackoverflow)
GB (1) GB1308838A (enrdf_load_stackoverflow)
IT (1) IT1008005B (enrdf_load_stackoverflow)
SE (1) SE358210B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4458650A (en) * 1982-09-23 1984-07-10 General Motors Corporation Fuel injection system
RU2372515C2 (ru) * 2007-12-05 2009-11-10 Александр Николаевич Цехановский Насосная система подачи топлива в двигатель внутреннего сгорания

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248188A (en) * 1978-12-29 1981-02-03 Cummins Engine Company, Inc. Hydraulic attenuator for air fuel control pump

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543739A (en) * 1967-10-11 1970-12-01 Brev Etudes S I B E De Fuel feed device for an internal combustion engine
US3596645A (en) * 1968-12-12 1971-08-03 Sibe Fuel feed devices for internal-combustion engines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543739A (en) * 1967-10-11 1970-12-01 Brev Etudes S I B E De Fuel feed device for an internal combustion engine
US3596645A (en) * 1968-12-12 1971-08-03 Sibe Fuel feed devices for internal-combustion engines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4458650A (en) * 1982-09-23 1984-07-10 General Motors Corporation Fuel injection system
RU2372515C2 (ru) * 2007-12-05 2009-11-10 Александр Николаевич Цехановский Насосная система подачи топлива в двигатель внутреннего сгорания

Also Published As

Publication number Publication date
BR7101971D0 (pt) 1973-02-22
DE2108069A1 (de) 1971-11-11
SE358210B (enrdf_load_stackoverflow) 1973-07-23
FR2092974A6 (enrdf_load_stackoverflow) 1972-01-28
GB1308838A (en) 1973-03-07
IT1008005B (it) 1976-11-10
ES388925A2 (es) 1973-05-01

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