US3659563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Individual correcting system for the electronically controlled electromagnetic injectors in internal combustion engines
Assignee: Societe des Procedes Modernes dInjection SOPROMI
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Filing: 1970-07-09
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Granted: 1972-05-02
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Expires: 1990-07-09
Abstract
Abstract The invention provides an individual correction of the duration of the injection of fuel into any one of the injectors of an internal combustion engine. To this end the signals generated by electronic control means and fed into the solenoid controlling injectors are diverted into a circuit connected across the terminals of the solenoid and including in series an adjustable impedance such as a resistance which may be in parallel with an adjustable capacitance and at least one diode the direction of which defines whether the lag is obtained for the opening or for the closing of the injector. A preferred embodiment of said circuit includes a resistance connected with the slider of a potentiometer the ends of which are connected with diodes connected in opposite directions and in parallel in the circuit so that according to the position of the slider the lag-producing action is predominantly that of one or the other diode.
Inventors
- 👤 Louis A Monpetit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:28
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/008; F02D41/20; F02D2041/202; F02D2041/2031
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
In an internal combustion engine having at least one electromagnetic fuel injector and a solenoid for actuating said injector in response to control signals of duration corresponding to the desired amount of fuel to be injected, an improved electric circuit for correcting the amount of fuel injected during each control signal comprising: a. 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.
Claim 2
Dependent Claim
95 words
In an internal combustion engine having at least one electromagnetic fuel injector and a solenoid for actuating said injector in response to control signals of duration corresponding to the desired amount of fuel to be injected, an improved electric circuit for correcting the amount of fuel injected during each control signal comprising: a. 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.
Claim 3
Dependent Claim
203 words
In an internal combustion engine having at least one electromagnetic fuel injector and a solenoid for actuating said injector in response to control signals of duration corresponding to the desired amount of fuel to be injected, an improved electric circuit for correcting the amount of fuel injected during each control signal comprising: a. a first resistance, one end of which is connected to one terminal of the solenoid; b. an adjustable potentiometer including a second resistance and a slider, the slider being connected to the other end of said resistance; c. a first diode connected between one end of the second resistance and the other terminal of the solenoid in a direction such that it shunts a portion of the solenoid energizing current to delay opening of the injector; and d. a second diode connected between the other end of the second resistance and the other terminal of the solenoid in a direction opposite to that of the first diode such that it shunts a portion of break-induced current in the solenoid to delay closing of the injector, 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.
Claim 4
Dependent Claim
203 words
In an internal combustion engine having at least one electromagnetic fuel injector and a solenoid for actuating said injector in response to control signals of duration corresponding to the desired amount of fuel to be injected, an improved electric circuit for correcting the amount of fuel injected during each control signal comprising: a. a first resistance, one end of which is connected to one terminal of the solenoid; b. an adjustable potentiometer including a second resistance and a slider, the slider being connected to the other end of said resistance; c. a first diode connected between one end of the second resistance and the other terminal of the solenoid in a direction such that it shunts a portion of the solenoid energizing current to delay opening of the injector; and d. a second diode connected between the other end of the second resistance and the other terminal of the solenoid in a direction opposite to that of the first diode such that it shunts a portion of break-induced current in the solenoid to delay closing of the injector, 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.
References Cited (Backward Citations)
US2991396A
Cited
US3448728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |