US3720190A - Fuel feed devices for internal combustion engines - Google Patents

Fuel feed devices for internal combustion engines Download PDF

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Publication number
US3720190A
US3720190A US00146029A US3720190DA US3720190A US 3720190 A US3720190 A US 3720190A US 00146029 A US00146029 A US 00146029A US 3720190D A US3720190D A US 3720190DA US 3720190 A US3720190 A US 3720190A
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US
United States
Prior art keywords
photo
sensitive element
throttle member
light source
distributor
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
US00146029A
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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
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Societe Industrielle de Brevets et dEtudes SIBE
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • F02D41/182—Circuit arrangements for generating control signals by measuring intake air flow for the control of a fuel injection 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
    • 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

Definitions

  • 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 main throttle member actuated by the driver, an auxiliary throttle member which is opened automatically and progressively in proportion as the flow of air in the said pipe increases and 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, on the other hand lastly, a metering system sensitive to the position of the auxiliary throttle member and adapted to regulate the flow rate of the 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
  • the invention relates more particularly to those of the devices of the type concerned which have been described in United States patent of Applicant US. Pat. No. 3,543,739, and of which the abovesaid metering system comprises a member driven in continuous rotation by the internal combustion engine, and capable, by acting on the energizing of each electromagnet, of determining over a fraction only of each of its turns the opening of the valve actuated by this electromagnet, the 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, but not exclusively, among these devices, to those of which the abovesaid continuously rotating member comprises means adapted to emit, towards a stationary receiver a flow of energy during a fraction of a turn of which member the value varies as a function of the relative positions of the rotary member and of the receiver, this receiver being arranged so that it creates an energizing current for the abovesaid electromagnets according as it receives or not the flow of energy, and the auxiliary throttle member being arranged to modify the relative positions of the rotary member and of the receiver the means emitting the flow of energy being capable of being a light source and the receiver a photosensitive element such as a photodiode, the light source and the photosensitive element being arranged on opposite sides of the abovesaid rotary member which is arranged as an opaque screen pierced by at least one aperture to enable the illumination of the photosensitive element.
  • the abovesaid continuously rotating member comprises means adapted to emit, towards a stationary receiver a flow of energy during a fraction of a turn
  • the rotary member is advantageously constituted by a flat and opaque disc perpendicular to its axis of rotation, the stationary receiver being such that it can be brought nearer or spaced further from this axis.
  • the distributor described in more detail comprises moving mechanical parts, producing wear and noise and being relatively bulky.
  • the fuel feed device which comprises a distributor synchronized with the rotary member to send successively the intermittent energizing current into the various electromagnets
  • the distributor is constituted by at least one assembly comprising a light source, a photosensitive element and electronic gates, the light source and the photosensitive element being arranged on opposite sides of the rotary member so that the latter, according to its angular posi tion, interrupts or not the luminous beam between the light source and the photosensitive element and the assembly being such that this photosensitive element directs or not, according as it is illuminated or not, a control current towards the gates so that the latter, in their turn, direct the energizing current successively towards the various electromagnets.
  • the feed device is in addition, characterized by the fact that the photosensitive element of the metering system acts in combination with the photosensitive element of the distributor to control the gates of the distributor.
  • FIG. 1 shows, in diagrammatic elevation with portions in section, a feed device constructed according to the invention
  • FIG. 2 shows a section of the device along the line IIII ofFlG. l
  • FIG. 3 shows the electronic circuit of the embodiment shown in FIG. 2 and lastly,
  • FIG. 4 shows the voltage levels at various points of FIG. 3.
  • the device As regards the device as a whole, it is constituted in any suitable manner such that it comprises (FIGS. 1 and 2) on one hand, in its intake pipe 1, upstream of the main throttle member 2 actuated by the driver, an auxiliary throttle member 3 which is opened automatically and progressively in proportion as the flow rate of the air in the pipe 1 increases, the direction of flow being indicated by the arrow F in FIG. 1.
  • the auxiliary throttle member 3 is constituted by a butterfly valve keyed on an axle 4.
  • This butterfly 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 through a channel 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 constantly tends 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 passage 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 rate of the air in this pipe.
  • the valve 3 could be replaced by equivalent throttle members, of which examples have been described in United States patent of Applicant US. Pat. No. 3,543,739.
  • the abovesaid injection means are constituted by a source of fuel under pressure (not shown) of which the delivery circuit, opening into the pipe 1 downstream of the main throttle member 2, is controlled by valves such as 16 each actuated by an electromagnet 17.
  • the metering system is made to comprise a flat and opaque disc 18 which is borne by a shaft 19 connected to the internal combustion engine (not shown) supplied by the device, so that the disc is rotated continuously around an axis perpendicular to its plane.
  • the disc 18 is interposed between a light source 20 and a photodiode 21 borne by a common support 22 connected to the auxiliary throttle member 3 and it is pierced by apertures 23 adapted to allow the beam emerging from the source 20 to reach the photodiode 21.
  • the photodiode 21 is arranged to create or not an energizing current for the electromagnet 17 according as it is illuminated or not and the assembly is such that this current is created over a fraction of each of the turns of the disc 18 which varies in the same sense as the degree of opening of the throttle member 3.
  • the light source 20 can be constituted by a lamp which is adapted to be supplied by a battery 24 as soon as the ignition switch 25 of the engine is closed and which is arranged in a hollow boss 26 pierced by a hole. This hole is oriented so as to direct a light beam onto the photodiode 21, through a hole passing through a hollow boss 27 where the said photodiode is housed.
  • the bosses 26 and 27 are caused to be borne by the ends of the U-shaped support 22 which straddles the disc 18 so that the source 20 and the photodiode 21 occur on both sides of the 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 photodiode 21.
  • the distributor 70 is synchronized with the disc 18 to send successively the intermittent energizing current into the different electromagnets, the disc possessing as many apertures 23 as cylinders or groups of cylinders to be supplied. These apertures are distributed regularly around the shaft 19 and each has a shape such that the fraction of a turn during which it normally enables the photodiode 21 to be illuminated increases in proportion as the throttle member 3 is opened, that is to say (in the embodiment shown) in proportion as the bosses 26, 27 approach the shaft 19.
  • the throttle member 3 In proportion as the flow rate of the air in the pipe 1 increases, the throttle member 3 is opened thereby driving the support 22 in the sense which brings the bosses 26 and 27 closer to the shaft 19. Each of the positions of these bosses corresponds to a different radius of the disc 18.
  • each aperture 23 has been determined in such a way that the fraction of a turn of disc 18 during which it allows the light ray to pass, emerging from the source 20, to the photodiode 21 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 flow rate of the air in the pipe 1.
  • the distributor is made to comprise two AND gates 71 and 72. Onto each of these gates, there is sent, on one hand, through two conductors 73 and 74, the electrical signal supplied by the photodiode 21 and, on the other hand, by two conductors 75 and 76, the electrical signal furnished by a second photodiode 77 which is fixed opposite a second light source 78, so that the disc 18 placed between the source 78 and the photodiode 77 can or cannot interrupt the lightbeam emerging from the source 78, according to its angular position.
  • the disc 18 can be constituted by two semicircles of different diameters connected by steps 79 and the photodiode 77 and the source 78 can be situated at the level of the outer edge of the disc 18 as shown in FIGS. 1 and 2.
  • the electrical signal furnished by the photodiode 77 is sent directly through the conductor 75 onto the gate 71 and, by means of an inverter 80, onto the gate 72 the outputs e and f of the gates 71 and 72 are amplified by the amplifier 28 and the amplified current is applied to two electromagnets 17 through conductors 81 and 82.
  • the operation of the distributor is explained by means of FIG. 4 where there have been shown, as a function of time t, the voltages at the points a, b, c, d, e and f.
  • the voltages a and b are those of the currents provided respectively from photodiodes 21 and 77 and entering the gate 71.
  • the voltages c and d are those of the currents entering the gate 72, the first coming from the photodiode 21 and the second coming, after having been inverted, from the photodiode 77.
  • the photodiode 21 is not illuminated (segments a a and a a the two gates 71 and 72 are blocked and no current circulates in the conductors 81 and 82 (segments e 3 e e ;f 5 ;f.,-f 1f the photodiode 21 is illuminated, on account of the inverter 80, one only of the gates 71 and 72 delivers an electrical signal to the point e or f according as the photodiode 77 is illuminated or not.
  • the gate 71 allows the current emerging from the photodiode 21 to pass, as shown at e e on the contrary, when the photodiode 77 is not illuminated, the gate 72 allows the current emerging from the photodiode 21 to pass, as seen atf f Consequently, current flows in the conductor 81 or 82 and one of the valves 16 is open.
  • the change of state of the photodiode 77 is effected always whilst the photodiode 21 is not illuminated.
  • the time of opening of the valve 16 must only be controlled by the time of illumination of the photodiode 21.
  • 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 is opened automatically and progressively in proportion as the air flow in the said pipe increases, means for injecting under pressure liquid fuel 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 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 conditions of operation 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 several valves each actuated by an electromagnet, the metering system comprising a light source and a photo-sensitive element arranged on opposite sides of a rotary member driven in continuous rotation by the internal combustion engine and adapted as an opa que shutter pierced bywindows to enable the illumination of said photosensitive element
  • Fuel feed device comprising two electronic gates of the AND type, with two inputs, the rotary member possessing two windows displaced by 280 and the photosensitive elements being photodiodes, the photodiode of the metering system and that of the one or more of the above-mentioned assemblies both having their outputs connected to the inputs of the AND gates, the output of the photodiode of the metering system being connected directly onto the input of one of the AND gates and by way of an inverter onto the input of the other AND gate and the outputs of the AND gates being connected respectively to two electromagnets or groups of electromagnets.

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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)
  • Ignition Installations For Internal Combustion Engines (AREA)
US00146029A 1970-06-05 1971-05-24 Fuel feed devices for internal combustion engines Expired - Lifetime US3720190A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7020853A FR2093235A6 (enrdf_load_stackoverflow) 1970-06-05 1970-06-05

Publications (1)

Publication Number Publication Date
US3720190A true US3720190A (en) 1973-03-13

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US00146029A Expired - Lifetime US3720190A (en) 1970-06-05 1971-05-24 Fuel feed devices for internal combustion engines

Country Status (8)

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US (1) US3720190A (enrdf_load_stackoverflow)
BR (1) BR7103383D0 (enrdf_load_stackoverflow)
DE (1) DE2125959A1 (enrdf_load_stackoverflow)
ES (1) ES391513A1 (enrdf_load_stackoverflow)
FR (1) FR2093235A6 (enrdf_load_stackoverflow)
GB (1) GB1307953A (enrdf_load_stackoverflow)
IT (1) IT1045059B (enrdf_load_stackoverflow)
SE (1) SE359618B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4488530A (en) * 1983-02-22 1984-12-18 Isadore Turetsky Controlling and switching mechanism

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5139056Y2 (enrdf_load_stackoverflow) * 1972-06-07 1976-09-24
DE2458946C2 (de) * 1974-12-12 1983-02-17 Siemens AG, 1000 Berlin und 8000 München Optischer Analog-Festwertspeicher
DE2846804C2 (de) * 1978-10-27 1982-08-12 Volkswagenwerk Ag, 3180 Wolfsburg Verfahren und Anordnung zur Erzielung einer Korrektur einer Kennlinie, die in einer Ansteuereinrichtung für ein Kraftstoffzumeßorgan einer Brennkraftmaschine gespeichert ist

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430616A (en) * 1966-11-11 1969-03-04 Bosch Gmbh Robert Fuel injection control system
US3522794A (en) * 1968-03-28 1970-08-04 Bosch Gmbh Robert Electronically controlled injection system for an internal combustion engine
US3543739A (en) * 1967-10-11 1970-12-01 Brev Etudes S I B E De Fuel feed device for an internal combustion engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430616A (en) * 1966-11-11 1969-03-04 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
US3522794A (en) * 1968-03-28 1970-08-04 Bosch Gmbh Robert Electronically controlled injection system for an internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4488530A (en) * 1983-02-22 1984-12-18 Isadore Turetsky Controlling and switching mechanism

Also Published As

Publication number Publication date
GB1307953A (en) 1973-02-21
DE2125959A1 (de) 1971-12-23
SE359618B (enrdf_load_stackoverflow) 1973-09-03
IT1045059B (it) 1980-05-10
ES391513A1 (es) 1973-07-01
FR2093235A6 (enrdf_load_stackoverflow) 1972-01-28
BR7103383D0 (pt) 1973-04-17

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