US3659563A - Individual correcting system for the electronically controlled electromagnetic injectors in internal combustion engines - Google Patents

Individual correcting system for the electronically controlled electromagnetic injectors in internal combustion engines Download PDF

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Publication number
US3659563A
US3659563A US53342A US3659563DA US3659563A US 3659563 A US3659563 A US 3659563A US 53342 A US53342 A US 53342A US 3659563D A US3659563D A US 3659563DA US 3659563 A US3659563 A US 3659563A
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United States
Prior art keywords
solenoid
injector
resistance
fuel
diode
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Expired - Lifetime
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US53342A
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English (en)
Inventor
Louis A Monpetit
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Societe des Procedes Modernes dInjection SOPROMI
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Societe des Procedes Modernes dInjection SOPROMI
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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
    • F02D41/008—Controlling each cylinder individually
    • 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
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • 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
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2031—Control of the current by means of delays or monostable multivibrators

Definitions

  • ABSTRACT om The invention provides an individual correction of the dura- [221 Wed: July 1970 tion of the injection of fuel into any one of the injectors of an [21] APPL 53,342 internal combustion engine.
  • the signals generated by electronic control means and fed into the solenoid controlling injectors are diverted into a circuit connected across Foreign Pl i rity ial the terminals of the solenoid and including in series an ad- Aug 1 1969 France 6926492 justable impedance such as a resistance which may be in parallel with an adjustable capacitance and at least one diode the 1 CI I l l I I l l I I U 3 l direction of defines whether the lag is obtained for the I 5 I] Int. Cl Fo'zm 52/00 opening or for the closing of the injector.
  • a preferred embodi- [58] Field 32 EA ment of said circuit includes a resistance connected with the UIDIG 6 l 3 l slider of a potentiometer the ends of which are connected with diodes connected in opposite directions and in parallel in the 56] References Cited circuit so that according to the position of the slider the lagproducing action is predominantly that of one or the other UNITED STATES PATENTS diode- 3,448,728 6/ l 969 2 Claims, 4 Drawing Figures Scholl ..l23/l 19 X Patented May 2, 1972 2 Sheets-Sheet l INVENTQR Log/s MON ET/T 5v Z i 2% 2 ATTORn/EXS Patented May 2, 1972 3,659,563
  • the present invention has for its object an individual electric system for the correction of the amount of fuel injected into each electromagnetic injector controlled by a signal supplied by electronic control means.
  • electromagnetic injectors for internal combustion engines from comparatively simple arrangements comprising a solenoid provided with its stationary armature extending within the body of the injector while a movable armature is rigid with the injector needle cooperating with its seat so as to control the opening and closing of the injection port as provided by the signals produced by the electronic control means.
  • the needle is generally urged back against its seat by a spring and although such injectors seem to be simple it is a difficult matter to obtain perfect identity of design and operation between them.
  • the amounts of fuel to be injected which are small should be measured with a high accuracy within a comparatively short time while the rising movement of the needle extends over only about 0.1 mm.
  • the grade of the magnetic sections, the allowances in the mechanical parts, the clamping of the parts upon assembly of the injectors and the clamping of the injectors when fitted in position may exert an action on the accuracy of the injection.
  • the present invention has for its object to solve such problems and it covers an individual electric circuit correcting the amount of fuel injected by each injector, said circuit including in parallel with the injector solenoid a variable impedance or two variable impedances in parallel, said impedance arrangement being connected in series with a diode or with two diodes in parallel.
  • the diode may be connected in the opposite direction so as to ensure a partial shunting of the break-induced current.
  • the resistance is associated with a potentiometer the slider of which is connected with one of the terminals of the injector solenoid while each terminal of the resistance forming the potentiometer is connected with the other terminal of the solenoid through a corresponding diode, one of said diodes ensuring a shunting of the feed current while the other diode ensures a shunting of the break-induced current in a manner such that, according to the position of the potentiometer slider, the correction is performed predominantly at the beginning of the injection or conversely at its end.
  • FIG. I is a block diagram of the arrangement of the electronically controlled injection means incorporating correcting systems according to the invention.
  • FIG. 2 is a detail of an electric correcting circuit according to a first embodiment.
  • FIG. 3 is a detail of an electric correcting circuit according to a first modification.
  • FIG. 4 is a detail of an electric circuit according to a further modification.
  • the engine 1 is provided in its admission manifold 51 with electromagnetically controlled injectors 4 fed with fuel under constant pressure by the pump 50 sucking fuel out of the container 46.
  • the feeding of fuel is performed through a filter 49 associated with a pressure regulator 48 and a pressure accumulator 47
  • a signal generator 2 associated with the rotation of the engine feeds signals to control means 5 each time an injection is to be executed.
  • Said control means 5 are fed with current by the battery 53 through the switch 52 and produce an injectioncontrolling signal the duration of which depends on the operative parameters of the engine, said duration defining the amount of fuel injected.
  • the signals are applied to the injectors through the agency of a distributor 3 controlled by the rotation of the engine, of power means 9 and of the individual correcting means 6.
  • FIG. 2 there is illustrated the solenoid 4a controlling an injector and correcting means 6, comprising diode 7, and adjustable resistance 8 in parallel with adjustable capacitance l1. Either of the components 8 and 11 may be used alone if required.
  • the direction in which diode 7 is connected ensures partial shunting of the current feeding the injector so as to produce a lag in the opening of the injector.
  • the electric circuit according to the invention is executed advantageously as a unit in which the desired connections may be made just before operation so as to connect the diode in the desired direction while the adjustable components are adjusted.
  • Both corrections may be associated as illustrated in FIG. 4 in which the resistance 8 is connected with a potentiometer 10 while the diodes 7a and 7b connect the corresponding terminals of said potentiometer 10 with the terminal of the solenoid opposite to that connected with the resistance 8 so that the position of the potentiometer slider may lead to a correction producing predominantly a lag for the beginning or for the end of the injection.
  • an improved electric circuit for correcting the amount of fuel injected during each control signal comprising:
  • an adjustable impedance connected across said solenoid and b. a diode connected in circuit with said adjustable impedance across said solenoid in a direction such that it shunts a portion of the solenoid energizing current to thereby delay opening of the injector.
  • an improved electric circuit for correcting the amount of fuel injected during each control signal comprising:
  • the relative amount of opening and closing delay being determined by the position of the slider relative to the two ends of the second resistance.

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  • 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)
US53342A 1969-08-01 1970-07-09 Individual correcting system for the electronically controlled electromagnetic injectors in internal combustion engines Expired - Lifetime US3659563A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6926492A FR2055859A5 (fr) 1969-08-01 1969-08-01

Publications (1)

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US3659563A true US3659563A (en) 1972-05-02

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US53342A Expired - Lifetime US3659563A (en) 1969-08-01 1970-07-09 Individual correcting system for the electronically controlled electromagnetic injectors in internal combustion engines

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US (1) US3659563A (fr)
DE (1) DE2036655A1 (fr)
FR (1) FR2055859A5 (fr)
GB (1) GB1319662A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3815556A (en) * 1971-05-12 1974-06-11 Motobecane Ateliers Device for controlling the injection of fuel in internal combustion engines
US3835819A (en) * 1972-12-29 1974-09-17 Essex International Inc Digital engine control apparatus and method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2991396A (en) * 1958-04-11 1961-07-04 Square D Co Voltage surge suppressor
US3448728A (en) * 1966-08-31 1969-06-10 Bosch Gmbh Robert Controller for fuel injection systems for internal combustion engines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2991396A (en) * 1958-04-11 1961-07-04 Square D Co Voltage surge suppressor
US3448728A (en) * 1966-08-31 1969-06-10 Bosch Gmbh Robert Controller for fuel injection systems for internal combustion engines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Electronics World, May 1967, Arc, Surge, & Noise Suppression by R. M. Rovnyak (pages 46 48). *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3815556A (en) * 1971-05-12 1974-06-11 Motobecane Ateliers Device for controlling the injection of fuel in internal combustion engines
US3835819A (en) * 1972-12-29 1974-09-17 Essex International Inc Digital engine control apparatus and method

Also Published As

Publication number Publication date
GB1319662A (en) 1973-06-06
FR2055859A5 (fr) 1971-05-14
DE2036655A1 (de) 1971-02-11

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