US4467748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Start control device in fuel supply system for internal combustion engine
Assignee: Aisan Industry Co Ltd
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Filing: 1983-06-28
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Granted: 1984-08-28
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Expires: 2003-06-28
Abstract
Abstract In combination with a start control device in a fuel supply system for an internal combustion engine including an actuator having a step motor therein as a drive source and a control circuit for controlling the step motor wherein the actuator serves to control at least one of the amounts of fuel and air to be supplied to the engine, the improvement comprising a power-off detecting circuit for detecting stop of power supply to the control circuit, an auxiliary power circuit for supplying electric power to the control circuit and the step motor for a predetermined period of time in response to a detecting signal from the power-off detecting circuit and an actuator driving timer for feeding a predetermined actuating signal to the step motor in response to the detecting signal from the power-off detecting circuit.
Inventors
- 👤 Yukihiro Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:02
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/3005; F02D41/02; F02D41/04; F02D41/06; F02D41/062; F02M; F02M7/00; F02M7/23; F02M7/24; F02D11/00; F02D11/06; F02D11/10; F02D2011/101; F02D2011/104; F02D41/20; F02D2041/202; F02D2041/2031; F02D2200/00; F02D2200/50; F02D2200/503; F02D2400/00; F02D2400/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
136 words
A start control device in a fuel supply system for an internal combustion engine which includes an actuator having a step motor therein as a drive source and a control circuit for controlling said step motor wherein said actuator serves to control at least one of the amounts of fuel and air to be supplied to said engine, said start control device comprising a power-off detecting circuit for detecting stop of power supply to said control circuit, an auxiliary power circuit for supplying electric power to said control circuit and said step motor for a predetermined period of time in response to a detecting signal from said power-off detecting circuit and an actuator driving timer for feeding a predetermined actuating signal to said step motor in response to said detecting signal from said power-off detecting circuit.
Claim 2
Dependent Claim
136 words
A start control device in a fuel supply system for an internal combustion engine which includes an actuator having a step motor therein as a drive source and a control circuit for controlling said step motor wherein said actuator serves to control at least one of the amounts of fuel and air to be supplied to said engine, said start control device comprising a power-off detecting circuit for detecting stop of power supply to said control circuit, an auxiliary power circuit for supplying electric power to said control circuit and said step motor for a predetermined period of time in response to a detecting signal from said power-off detecting circuit and an actuator driving timer for feeding a predetermined actuating signal to said step motor in response to said detecting signal from said power-off detecting circuit.
Claim 3
Dependent Claim
24 words
The device as defined in claim 1, and further comprising a discharging circuit connected to said auxiliary power circuit and said power-off detecting circuit.
Claim 4
Dependent Claim
19 words
The device as defined in claim 2, wherein said discharging circuit is composed of a transistor and a resistor.
Claim 5
Dependent Claim
31 words
The device as defined in claim 1, wherein said auxiliary power circuit is composed of a diode for preventing reverse current, a resistor for limiting current and a capacitor for charging.
Claim 6
Dependent Claim
20 words
The device as defined in claim 4, wherein said capacitor is an electric double layer capacitor of a large capacity.
Claim 7
Dependent Claim
14 words
The device as defined in claim 4, wherein said capacitor is connected in series.
Claim 8
Dependent Claim
22 words
The device as defined in claim 1, wherein said power-off detecting circuit is composed of a transistor, a resistor and a capacitor.
Claim 9
Dependent Claim
22 words
The device as defined in claim 1, wherein said auxiliary power circuit is composed of a diode, a capacitor and a relay.
Claim 10
Dependent Claim
28 words
The device as defined in claim 8 and further comprising a relay driving circuit connected to said auxiliary power circuit and the output of said actuator driving timer.
Claim 11
Dependent Claim
22 words
The device as defined in claim 9, wherein said relay driving circuit is composed of a transistor, a resistor and a diode.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |