US3721219A - Fuel feed devices for internal combustion engines - Google Patents

Fuel feed devices for internal combustion engines Download PDF

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Publication number
US3721219A
US3721219A US00189532A US3721219DA US3721219A US 3721219 A US3721219 A US 3721219A US 00189532 A US00189532 A US 00189532A US 3721219D A US3721219D A US 3721219DA US 3721219 A US3721219 A US 3721219A
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US
United States
Prior art keywords
fuel
throttle member
opening
pipe
diaphragm
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Expired - Lifetime
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US00189532A
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English (en)
Inventor
F Mennesson
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BREUETS ET D ETUDES S I B E SO
SOC IND DE BREUETS ET D ETUDES S I B E FR
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BREUETS ET D ETUDES S I B E SO
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    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/44—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for supplying extra fuel to the engine on sudden air throttle opening, e.g. at acceleration

Definitions

  • variable volume chamber is connected 3,596,645 8/1971 Mennesson 123/32 AE to the linking channel between a calibrated orifice and 3,662,721 5/1972 Klein ..123/32 AE the diaphragm of the pressure regulator and is con- K0118 B means to increase its volumc on opening of the main throttle member.
  • the invention relates to fuel feed devices, for inter: nal combustion engines, of the type which comprise, on one hand, in their 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, on the other hand, means for injecting liquid fuel under pressure into the portion of this pipe situated downstream of the main throttle member, and,
  • a metering system sensitive to the position of the auxiliary throttle member and adapted to adjust the flow rate of injected fuel in such a way that the richness of the air/fuel mixture passing in the intake pipe is substantially constant, at least for certain conditions of operation of the engine, the said injection means being constituted by a source of fuel under pressure of which the delivery circuit, opening into the abovesaid portion of the intake pipe, is controlled by at least one injection valve actuated by an electromagnet.
  • the invention relates more particularly to those devices of the type concerned which have been described in US. Pat. No. 3,543,739, and of which the abovesaid metering system comprises 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 revolutions the opening of the injection valve, this system being arranged so that it increases the said fraction in proportion as the opening of the auxiliary throttle member increases and vice versa.
  • the invention relates more particularly also 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 there acts a pressure regulator which comprises a relief valve tending to open under the action of the delivery pressure of the pump and to close under the effect of the suction existing in the section of the intake pipe comprised between its two throttle members, which suction is transmitted through a linking passage to a diaphragm to which the relief valve is coupled.
  • the concept of the pressure regulator which establishes the fuel pressure as a function of the suction which exists in the intake pipe downstream of the auxiliary throttle member, enables, in practice, the preservation of the correct richness of the mixture, on acceleration.
  • the device of the type defined above is characterized by the fact that a variable volume chamber is connected to the abovesaid linking passage between a calibrated orifice and the diaphragm of the regulator and is controlled by means adapted to increase its volume on opening of the main throttle member.
  • the increase in volume of the chamber which has just been defined causes an increase in the suction acting on the diaphragm of the regulator and, consequently, an increase in the pressure of the fuel directed towards the injection valve, that is to say, finally, an increase in the flow rate of the fuel, all other things being equal.
  • FIG. 1 shows in diagrammatic elevation with portions cut out, one embodiment of a fuel feed device constructed according to the invention.
  • FIG. 2 shows a cross-section along the line -11 of the embodiment of FIG. I.
  • the device As regards the device as a whole, it is constituted in any suitable manner so that it comprises:
  • a metering system sensitive to the position of the auxiliary throttle member 3 and adapted to adjust in such a way the flow rate of fuel injected that the richness of the air/fuel mixture passing in the pipe 1 is substantially constant, at least for certain conditions of operation of the engine.
  • 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 from one another two chambers 6 and 7.
  • the chamber 6 is connected by a passage 8 to a chamber 9 constituted by the section 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 trans mitted into the chamber 6.
  • the chamber 7 is placed at atmospheric pressure by a channel 14 starting preferably from the air intake 15 of the pipe 1.
  • valve 3 the angular position taken up at each moment inside the pipe 1 by the valve 3 corresponds to the air flow rate which is passing in this pipe.
  • the valve 3 could be replaced by equivalent throttle members, of which examples have been described in the US. Pat. No. 3,543,739.
  • 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 injection valve 16 actuated by 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 a continuous rotary movement around an axis perpendicular to its plane.
  • the disc 18 is interposed between a light source 20 and a receiver such as a photodiode or photoelectric cell 21,, borne 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 beam coming from the source 20 to arrive at the cell 21.
  • the cell 21 is arranged to control the energization of the electromagnet 17 according as it is illuminated 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 light source 20 may 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 isclosed and which is arranged in a hollow boss 26 pierced by a hole. This hole is oriented so 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 borne by the ends of the U support 22 which straddles the disc 18 so that the source 20 and the cell 21 occur on each side of the disc and which is rigidly attached 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 can be interposed between the latter and the electromagnet 17 an amplifying relay 28.
  • the throttle member 3 opens by driving the support 22 in the sense which causes the bosses 26 and 27 to approach the shaft 19. Each of the positions of these bosses corresponds to a different radius of the disc 18. 7
  • each window 23 Since the shape of each window 23 has been determined so that the fraction of a revolution, during which it allows the light ray coming from the source 20 to pass towards the cell 21 (creation of a current in conductor 31), increases in proportion as the latter elements approach the shaft 19, it is ensured that the flow rate of the fuel delivered by each injection valve 16 varies in the same sense as the air flow rate in the pipe 1.
  • the source of liquid under pressure is constituted by a fuel pump of which the aspiration pipe 51 dips into a fuel reservoir 52 and on the delivery pipe 53 of which a pressure regulator 54 acts.
  • the latter comprises a relief 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 on to a diaphragm 57 to which the valve 55 is coupled by a rod 58.
  • the valve 55 cooperates with a seat 59 which constitutes the outlet of a chamber 60 connected by a branch channel 61 to the delivery pipe 53.
  • the linking channel 56 ends at a variable volume chamber 62 bounded by one surface of the diaphragm 57, the other surface being placed at atmospheric pressure, for example by 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.
  • a variable volume chamber 84 is connected to the linking channel 56, between a calibrated orifice 85 and the chamber 62 bounded by the diaphragm 57 of the regulator 54, and is controlled by means adapted to increase its volume on the opening of the main throttle member 2.
  • variable volume chamber 84 is bounded inside a fixed cylinder 86, by a piston 87 mechanically connected to the main throttle member 2.
  • a piston 87 mechanically connected to the main throttle member 2.
  • the latter being constituted by a butterfly valve keyed on a rotary axle 88, the piston 87 is connected to it by a lever 89 rigidly fixed to the axle 88 and by a rod coupled by its two ends respectively to the piston 87 and to the free end of the lever 89.
  • the assembly of the lever 89 and of the rod 90 is arranged so that opening of the main throttle member 2 causes movement of the piston 87 in the sense which increases the volume of the chamber 84.
  • the volume of the chamber 84 is increased, which, by reason of the presence of the calibrated orifice 85, increases the suction which acts on the diaphragm 87 of the regulator 54.
  • Increase in the suction is all the greater as the orifice 85 is smaller and as the opening of the main throttle member 2 is more rapid.
  • 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 especially indicated; it encompasses, on the contrary, all variations, especially that where the piston 87, which limits the variable volume chamber 84, is replaced by an equivalent movable or deformable element.
  • 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 air flow increases in the said pipe, means for injecting liquid fuel under pressure into the 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 adjust 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
  • said injection means being constituted by a source of fuel under pressure whose delivery circuit, opening into said portion of the intake pipe, is controlled by at least one injection valve actuated by an electromagnet
  • the metering system comprising a member driven in a continuous rotary movement 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 injection valve, said metering system being arranged so that it increases and decreases said fraction in proportion as the opening of the auxiliary throttle member increases and decreases respectively
  • said source of fuel under pressure being constituted by a fuel pump in the delivery pipe of which acts a pressure regulator which comprises a relief valve 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 section of the intake pipe comprised between said main and auxiliary throttle members, which suction is transmitted through a linking passage to a diaphragm to which the relief valve is coupled, a variable volume chamber being connected to said linking
  • variable volume chamber is limited inside a fixed cylinder by a piston mechanically connected to the main throttle member.

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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)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
US00189532A 1970-10-30 1971-10-15 Fuel feed devices for internal combustion engines Expired - Lifetime US3721219A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7039332A FR2109516A6 (de) 1970-10-30 1970-10-30

Publications (1)

Publication Number Publication Date
US3721219A true US3721219A (en) 1973-03-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00189532A Expired - Lifetime US3721219A (en) 1970-10-30 1971-10-15 Fuel feed devices for internal combustion engines

Country Status (10)

Country Link
US (1) US3721219A (de)
JP (1) JPS5118017B1 (de)
AU (1) AU446809B2 (de)
BR (1) BR7105710D0 (de)
DE (1) DE2144720A1 (de)
ES (1) ES396487A2 (de)
FR (1) FR2109516A6 (de)
GB (1) GB1309730A (de)
IT (1) IT1045054B (de)
SE (1) SE364092B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034721A (en) * 1974-07-16 1977-07-12 Alfa Romeo S.P.A. Electrical indirect petrol injection system for Otto cycle engines
US4721085A (en) * 1983-01-03 1988-01-26 William D. Adams Varying area fuel system for combustion engine
WO1989006747A1 (en) * 1983-01-03 1989-07-27 William Daniel Adams Varying area fuel system for combustion engine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52105620A (en) * 1976-03-03 1977-09-05 Furukawa Electric Co Ltd Sound insulation wall unit
FR2452605B1 (fr) * 1979-03-27 1986-08-01 Ntn Toyo Bearing Co Ltd Dispositif d'alimentation de carburant

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2904026A (en) * 1957-04-29 1959-09-15 Acf Ind Inc Fuel injection system
US3596645A (en) * 1968-12-12 1971-08-03 Sibe Fuel feed devices for internal-combustion engines
US3662721A (en) * 1968-11-08 1972-05-16 Volkswagenwerk Ag Fuel injection device for internal combustion engines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2904026A (en) * 1957-04-29 1959-09-15 Acf Ind Inc Fuel injection system
US3662721A (en) * 1968-11-08 1972-05-16 Volkswagenwerk Ag Fuel injection device for internal combustion engines
US3596645A (en) * 1968-12-12 1971-08-03 Sibe Fuel feed devices for internal-combustion engines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034721A (en) * 1974-07-16 1977-07-12 Alfa Romeo S.P.A. Electrical indirect petrol injection system for Otto cycle engines
US4721085A (en) * 1983-01-03 1988-01-26 William D. Adams Varying area fuel system for combustion engine
WO1989006747A1 (en) * 1983-01-03 1989-07-27 William Daniel Adams Varying area fuel system for combustion engine

Also Published As

Publication number Publication date
BR7105710D0 (pt) 1973-04-17
AU3485771A (en) 1973-05-03
SE364092B (de) 1974-02-11
FR2109516A6 (de) 1972-05-26
DE2144720A1 (de) 1972-05-18
IT1045054B (it) 1980-05-10
AU446809B2 (en) 1974-03-28
GB1309730A (en) 1973-03-14
ES396487A2 (es) 1974-05-01
JPS5118017B1 (de) 1976-06-07

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