Patent US3665901A successfully refreshed from Google Patents.
US3665901A
Expired / Lapsed
US
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System controlling the speedy energization of electromagnets, chiefly those controlling the opening of electromagnetic injectors in internal combustion engines
Assignee: Societe des Procedes Modernes dInjection SOPROMI
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Filing: 1969-12-23
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Granted: 1972-05-30
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Expires: 1989-12-23
Abstract
Abstract System controlling the speedy energization of electromagnets, chiefly those controlling the opening of electromagnetic injectors in internal combustion engines. An arrangement intended chiefly for the energization of electromagnetic solenoids for operating fuel injectors of internal combustion engines wherein the means for energizing the electromagnetic solenoids in the desired sequence receive control signals periodically and at the same frequency as an induction coil fed by the same power supply as said solenoids. The magnetic energy generated in the solenoids and in the induction coil upon termination of the control signals is stored in means such as one or more condensers so as to be recovered for rapidly energizing the proper electromagnetic solenoid for the next injector operation.
Inventors
- 👤 Louis A Monpetit
- 👤 Pierre M Advenier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:54
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/32; F02D41/20; F02D2041/2003; F02D2041/2006; F02D2041/201; F02D2041/2013; F02D2041/202; F02D2041/2031; F02D2041/2068; F02D2041/2082
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
249 words
In a system for rapidly energizing electromagnetic fuel injectors for internal combustion engines of the type having at least one injector, separate solenoids for actuating each injector, means for providing periodic first control signals of frequency directly related to engine speed for determining each fuel injection period, means for providing an injector activating signal during the time of each first control signal, a first condenser for storing a solenoid energizing charge, means for discharging the first condenser through each solenoid selectively in turn in response to one of the injector activating signals for rapidly energizing the selected solenoid to open its associated injector in accordance with the desired sequence of injector operation, and means for thereafter maintaining the energization of the selected solenoid in response to the first control signal for a period of variable duration depending on the time between commencement of one injector activating signal and the termination of the corresponding first control signal as determined by operating parameters of the engine, the improvement comprising: a. an induction coil for providing at least part of the solenoid energizing charge stored in said first condenser: b. means for periodically applying a voltage to said induction coil in response to second control signals of the same frequency as the first control signals and for causing a current to flow through the coil; and c. means for causing said first condenser to store the electromagnetic energy generated in at least said induction coil upon termination of each second control signal.
Claim 2
Dependent Claim
249 words
In a system for rapidly energizing electromagnetic fuel injectors for internal combustion engines of the type having at least one injector, separate solenoids for actuating each injector, means for providing periodic first control signals of frequency directly related to engine speed for determining each fuel injection period, means for providing an injector activating signal during the time of each first control signal, a first condenser for storing a solenoid energizing charge, means for discharging the first condenser through each solenoid selectively in turn in response to one of the injector activating signals for rapidly energizing the selected solenoid to open its associated injector in accordance with the desired sequence of injector operation, and means for thereafter maintaining the energization of the selected solenoid in response to the first control signal for a period of variable duration depending on the time between commencement of one injector activating signal and the termination of the corresponding first control signal as determined by operating parameters of the engine, the improvement comprising: a. an induction coil for providing at least part of the solenoid energizing charge stored in said first condenser: b. means for periodically applying a voltage to said induction coil in response to second control signals of the same frequency as the first control signals and for causing a current to flow through the coil; and c. means for causing said first condenser to store the electromagnetic energy generated in at least said induction coil upon termination of each second control signal.
Claim 3
Dependent Claim
128 words
The system of claim 1 wherein said means for discharging the first condenser through each solenoid selectively in turn comprises: a. separate first thyristors in series circuit with each solenoid and controlled selectively by the injector activating signals, all of said series solenoid circuits being connected in parallel between one common junction and another common junction, and said means for thereafter maintaining the energization of the selected solenoid comprises: b. a constant voltage source and c. a gating device connected in series with the paralleled solenoid circuits across the voltage source for closing the circuit between said voltage source and the solenoid circuits in response to the commencement of the first control signals and for opening said circuit in response to the termination of the first control signals.
Claim 4
Dependent Claim
84 words
The system of claim 2 wherein said means for periodically applying a voltage to and for causing a current to flow through the induction coil comprises: a. said constant voltage source and b. a gating device connected in series with the induction coil across the voltage source for closing the circuit between said voltage source and the induction coil in response to the commencement of the second control signals and for opening said circuit in response to the termination of the second control signals.
Claim 5
Dependent Claim
58 words
The system of claim 3 wherein the gating device for closing and opening the circuit between the voltage source and the induction coil in response to the second control signals is the same as the gating device for closing and opening the circuit between the voltage source and the induction coil in response to the first control signals.
Claim 6
Dependent Claim
56 words
The system of claim 4 wherein said first condenser is arranged in series with the paralleled solenoid circuits and the gating device across said voltage source, whereby the voltage of said first condenser, when charged, adds to the voltage of said voltage source for rapidly energizing the selected solenoid in response to an injector activating signal.
Claim 7
Dependent Claim
36 words
The system of claim 5 wherein the first control signal and the second control signal coincide, and said induction coil is in series with the paralleled solenoid circuits and the gating device across said voltage source.
Claim 8
Dependent Claim
39 words
The system of claim 6 wherein the first control signals are of variable duration corresponding to the desired time of injector activation, and the commencement of each injector activation signal coincides with the commencement of each first control signal.
Claim 9
Dependent Claim
222 words
The system of claim 6 wherein said induction coil is in paralLel with the first condenser, and the means for discharging the first condenser further comprises: a. a switching device between the first condenser and said one common junction of the solenoid circuits for connecting the first condenser to said one common junction in response to each injector activating signal and for disconnecting the first condenser from said one common junction at the termination of the first control signal, whereby the first condenser discharges through the selected solenoid upon coincident actuation of the gating device, the switching device, and a selected one of the first thyristors, and thereafter said voltage source maintains a flow of current through the induction coil and the selected solenoid for the duration of the first control signal; and wherein the means for causing said first condenser to store the electromagnetic energy generated in at least said induction coil comprises: b. a first diode connected between said other common junction of the paralleled solenoid circuits and the junction between the first condenser and the switching device for permitting transfer to the first condenser of the energy generated in the induction coil and the selected solenoid upon termination of the second control signal while preventing reverse flow of stored energy from the charged condenser except through said switching device.
Claim 10
Dependent Claim
51 words
The system of claim 8 further comprising: a. a second diode in series with the induction coil for permitting the flow of current through the induction coil and selected solenoid from the voltage source while preventing discharge of the first condenser through the induction coil upon actuation of the switching device.
Claim 11
Dependent Claim
36 words
The system of claim 5 wherein said induction coil is in parallel with said solenoids across the voltage source whereby current flow through the induction coil from the voltage source does not pass through said solenoids.
Claim 12
Dependent Claim
78 words
The system of claim 10 wherein the means for causing said first condenser to store the electromagnetic energy generated in at least said induction coil comprises: a. a first diode connected between the first induction coil and the first condenser for permitting transfer to the first condenser of the energy generated in the induction coil upon termination of the second control signal while preventing reverse flow of stored energy from the charged condenser through the first induction coil.
Claim 13
Dependent Claim
48 words
The system of claim 11 further comprising: a. a second diode connected in parallel with the first condenser for permitting the flow of current through the selected solenoid from the voltage source after each discharge of the first condenser while preventing short circuit discharge of the first condenser.
Claim 14
Dependent Claim
26 words
The system of claim 12 wherein said induction coil is arranged in parallel with the series circuit including the first condenser and the paralleled solenoid circuits.
Claim 15
Dependent Claim
105 words
The system of claim 13 further comprising: a. a second condenser connected between the junction of the induction coil with the first diode and said other common junctions of the paralleled solenoid circuits for storing the energy generated by the selected solenoid upon termination of each first control signal and for rapidly energizing the induction coil upon commencement of each second control signal and b. a third diode in parallel with the second condenser for permitting the flow of current through the induction coil from the voltage source for the duration of each second control signal while preventing short circuit discharge of the second condenser.
Claim 16
Dependent Claim
33 words
The system of claim 14 wherein the second and third diodes are zener diodes, whereby the charges on the first and second condensers are limited to the breakdown voltages of said zener diodes.
Claim 17
Dependent Claim
35 words
The system of claim 10 wherein the second control signal is of fixed duration, whereby the induction coil always generates the same energy for storage in the first condenser independent of the duration of injection.
Claim 18
Dependent Claim
51 words
The systeM of claim 16 wherein each second control signal occurs between successive first control signals and further comprising: a. a second thyristor in series with the induction coil and controlled by the second control signals for permitting current to flow through the induction coil only during each second control signal.
Claim 19
Dependent Claim
19 words
The system of claim 16 wherein the terminations of the first control signal and the second control signal coincide.
Claim 20
Dependent Claim
115 words
The system of claim 16 wherein the first and second control signals are of fixed duration not less than the longest desired time of injector activation, and the injector activation signal is initiated at a variable time after the commencement of the first control signal as determined by operating parameters of the engine, whereby the induction coil is always energized for periods of fixed duration by current from the voltage source delivered through the gating device in response to the second control signal, and the selected solenoids are energized for periods of variable duration equal to the time between the initiation of each injector activation signal and the termination of the corresponding first control signal.
Claim 21
Dependent Claim
118 words
The system of claim 12 wherein the means for discharging the first condenser further comprises: a. a switching device between the first condenser and said one common junction of the solenoid circuits for connecting the first condenser to said one common junction at the commencement of each injector activating signal and for disconnecting the first condenser from said one common junction at the termination of each first control signal, whereby the first condenser discharges through the selected solenoid upon coincident actuation of the gating device, the switching device, and a selected one of the first thyristors, and thereafter said voltage source maintains a flow of current through the selected solenoid for the duration of the first control signal.
Claim 22
Dependent Claim
51 words
The system of claim 20 wherein each second control signal occurs between successive first control signals and further comprises: a. a second thyristor in series with the induction coil and controlled by the second control signals for permitting current to flow through the induction coil only during each second control signal.
Claim 23
Dependent Claim
76 words
The system of claim 21 further comprising: a. a second condenser in parallel with the first condenser for storing a preliminary solenoid energizing charge; b. means for providing a third control signal preceeding each injector activating signal; c. an auxiliary switching device connecting the second condenser to said one common junction of the paralleled solenoid circuits and responsive to the third control signal for providing preliminary energization of the solenoids by discharge of the second condenser.
References Cited (Backward Citations)
DE954627C
Cited
US2920195A
Cited
US3072045A
Cited
US3056906A
Cited
US3456628A
Cited
US3465730A
Cited
US3433207A
Cited
US3465731A
Cited
US3490425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |