US3573482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric fuel pump control circuit
Assignee: Ford Motor Co
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Filing: 1969-07-10
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Granted: 1971-04-06
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Expires: 1989-07-10
Abstract
Abstract An electric fuel pump control circuit for an electric fuel pump that furnishes fuel for an internal combustion engine in which electrical energy is supplied to the fuel pump during starting operations from the electrical storage battery of the internal combustion engine and during normal running operations, after starting operations have been terminated, is supplied from one of the output windings of an alternator which is operated by the internal combustion engine. The electric fuel pump is energized, during starting operations, by battery and system voltage and subsequent to starting operations is energized from the alternator output windings at an average voltage of substantially half the battery and system voltage and at a peak voltage which is proportional to engine speed.
Inventors
- 👤 Kenneth R Brooks
- 👤 Jacques Mosier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:30
CPC Classifications
F; F02; F02M; F02M37/00; F02M37/04; F02M37/08; H; H02; H02P; H02P5/00; H02P5/60; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/292; H02P7/293; F02M2037/085
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
113 words
In an electric fuel pump system for an internal combustion engine the combination comprising an electric fuel pump motor, an electrical storage battery, an alternator having a plurality of output windings, rectifier means coupling said output windings and said electrical storage battery, a starting motor, and means for energizing said electrical fuel pump directly from said battery when said starter motor is energized, said output windings of said alternator being Wye connected, a unilateral conducting means conNecting one terminal of said electrical fuel pump to the neutral point of said windings and means connecting the other terminal of said electric fuel pump to one terminal of said rectifier and said electrical storage battery.
Claim 2
Dependent Claim
113 words
In an electric fuel pump system for an internal combustion engine the combination comprising an electric fuel pump motor, an electrical storage battery, an alternator having a plurality of output windings, rectifier means coupling said output windings and said electrical storage battery, a starting motor, and means for energizing said electrical fuel pump directly from said battery when said starter motor is energized, said output windings of said alternator being Wye connected, a unilateral conducting means conNecting one terminal of said electrical fuel pump to the neutral point of said windings and means connecting the other terminal of said electric fuel pump to one terminal of said rectifier and said electrical storage battery.
Claim 3
Dependent Claim
39 words
The combination of claim 1, in which said one terminal of said electric fuel pump motor is connected to said starting motor through a second unilateral conducting means poled in the opposite direction from said first-mentioned unilateral conducting means.
Claim 4
Dependent Claim
138 words
In an electric fuel pump system for an internal combustion engine the combination comprising an electric fuel pump motor, an electrical storage battery, an alternator having a plurality of output windings, rectifier means coupling said output windings and said electrical storage battery, a starting motor, electrical-switching means when actuated coupling said electrical storage battery with said starter motor, and means coupled to said electrical-switching means, said output windings and said electric fuel pump motor for energizing said fuel pump from said battery when said electrical-switching means is actuated, said output winding of said alternator being Wye connected, a unilateral conducting means connecting one terminal of said electric fuel pump to the neutral point of said windings and means connecting the other terminal of said electric fuel pump to one terminal of said rectifier and said electrical storage battery.
Claim 5
Dependent Claim
138 words
In an electric fuel pump system for an internal combustion engine the combination comprising an electric fuel pump motor, an electrical storage battery, an alternator having a plurality of output windings, rectifier means coupling said output windings and said electrical storage battery, a starting motor, electrical-switching means when actuated coupling said electrical storage battery with said starter motor, and means coupled to said electrical-switching means, said output windings and said electric fuel pump motor for energizing said fuel pump from said battery when said electrical-switching means is actuated, said output winding of said alternator being Wye connected, a unilateral conducting means connecting one terminal of said electric fuel pump to the neutral point of said windings and means connecting the other terminal of said electric fuel pump to one terminal of said rectifier and said electrical storage battery.
Claim 6
Dependent Claim
38 words
The combination of claim 3 in which said one terminal of said electric fuel pump is connected to said starting motor through a second unilateral conducting means poled in the opposite direction from said first-mentioned unilateral conducting means.
Claim 7
Dependent Claim
201 words
In an electric fuel pump system for an internal combustion engine, the combustion comprising an electric fuel pump motor, an electrical storage battery, an alternator having a plurality of Wye connected output windings including a neutral point and a rectifier means coupled to said output windings and said electrical storage battery, a starter motor for the internal combustion engine, an electrical circuit means coupled to said source of electrical energy and said starter motor for energizing said starter motor from said electrical storage battery during engine starting operations, and means coupled to said electrical circuit means, said electrical fuel pump motor and said rectifier for energizing said electric fuel pump motor with a voltage having an average value of about one-half the voltage of the electric storage battery and a peak voltage that increases as a function of engine speed after starting operations have been terminated and the internal combustion engine is in operation, said last-mentioned means includes a unilateral conducting means connected to said neutral point and one terminal of electrical fuel pump motor, the other terminal of said electric fuel pump motor being connected to one terminal of the said rectifier and one terminal of said electrical storage battery.
Claim 8
Dependent Claim
201 words
In an electric fuel pump system for an internal combustion engine, the combustion comprising an electric fuel pump motor, an electrical storage battery, an alternator having a plurality of Wye connected output windings including a neutral point and a rectifier means coupled to said output windings and said electrical storage battery, a starter motor for the internal combustion engine, an electrical circuit means coupled to said source of electrical energy and said starter motor for energizing said starter motor from said electrical storage battery during engine starting operations, and means coupled to said electrical circuit means, said electrical fuel pump motor and said rectifier for energizing said electric fuel pump motor with a voltage having an average value of about one-half the voltage of the electric storage battery and a peak voltage that increases as a function of engine speed after starting operations have been terminated and the internal combustion engine is in operation, said last-mentioned means includes a unilateral conducting means connected to said neutral point and one terminal of electrical fuel pump motor, the other terminal of said electric fuel pump motor being connected to one terminal of the said rectifier and one terminal of said electrical storage battery.
Claim 9
Dependent Claim
71 words
The combination of claim 5 in which said last-mentioned means includes a second unilateral conducting means connected between one terminal of said starter motor and said one terminal of said electric fuel pump motor, said second unilateral conducting means being poled in the opposite direction from said first-mentioned unilateral conducting means, and the other terminal of said starter motor being connected to said other terminal of said electric fuel pump motor.
Claim 10
Dependent Claim
29 words
The combination of claim 6 in which said one of said terminals of said electric fuel pump motor is connected to like polarity electrodes of said unilateral conducting means.
References Cited (Backward Citations)
US2218847A
Cited
US2370249A
Cited
US2912595A
Cited
US2989644A
Cited
US3476949A
Cited
US3502895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |