US4453506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic engine stop and start system
Assignee: Toyota Motor Corp
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Filing: 1982-04-26
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Granted: 1984-06-12
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Expires: 2002-04-26
Abstract
Abstract In a system wherein the operating conditions of various portions of a vehicle are detected and an engine is automatically stopped and started in accordance with the operating conditions thus detected, a fuel supply system is cut to prevent the run-on of the engine in addition to the cut-off of current passage to an ignition system as in the prior art. There controls are effected when both any one or more of predetermined operating conditions and any one or more of conditions of precluding the automatic stop are present.
Inventors
- 👤 Masahiro Ueda
- 👤 Masahiko Noba
- 👤 Osamu Hori
- 👤 Kimitoshi Murata
- 👤 Hatsuo Nakao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:48
CPC Classifications
F; F02; F02N; F02N11/00; F02N11/08; F02N11/0814; F02N11/0818; F02D; F02D37/00; F02D37/02; F02P; F02P11/00; F02P11/02; F02P11/025; F02P3/00; F02P3/02; F02P3/04; F02P3/055; F02P3/0552; F02P3/0556; F02P3/0558; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
143 words
An automatic engine stop and start system for an internal combustion engine having a slow port to which fuel is fed when the internal combustion engine is in an idling condition and an ignition circuit including an ignition plug and an ignition coil producing high voltage to be fed to said ignition plug, wherein predetermined operating conditions of various predetermined portions of a vehicle are detected and the internal combustion engine is automatically stopped and started in accordance with the detected operating conditions, comprising: a fuel control valve for cutting fuel fed to said slow port when the internal combustion engine is automatically stopped; and de-energizing means connected to said fuel control valve and said ignition coil for cutting off current fed to said ignition coil and simultaneously closing said fuel control valve when the predetermined conditions for automatic engine stopping are fulfilled.
Claim 2
Dependent Claim
143 words
An automatic engine stop and start system for an internal combustion engine having a slow port to which fuel is fed when the internal combustion engine is in an idling condition and an ignition circuit including an ignition plug and an ignition coil producing high voltage to be fed to said ignition plug, wherein predetermined operating conditions of various predetermined portions of a vehicle are detected and the internal combustion engine is automatically stopped and started in accordance with the detected operating conditions, comprising: a fuel control valve for cutting fuel fed to said slow port when the internal combustion engine is automatically stopped; and de-energizing means connected to said fuel control valve and said ignition coil for cutting off current fed to said ignition coil and simultaneously closing said fuel control valve when the predetermined conditions for automatic engine stopping are fulfilled.
Claim 3
Dependent Claim
20 words
An automatic engine stop and start system according to claim 1, wherein said fuel control valve comprises: a solenoid valve.
Claim 4
Dependent Claim
78 words
An automatic engine stop and start system according to claim 1, wherein said de-energizing means comprises: a first relay switch interposed between said fuel control valve and a power source, and a second relay switch interposed between said ignition coil and the power source, wherein when said predetermined conditions for automatic engine stopping are fulfilled, said first and second relay switches are opened, respectively, thereby cutting the currents fed to said fuel control valve and said ignition coil.
Claim 5
Dependent Claim
78 words
An automatic engine stop and start system according to claim 2, wherein said de-energizing means comprises: a first relay switch interposed between said fuel control valve and a power source, and a second relay switch interposed between said ignition coil and the power source, wherein when said predetermined conditions for automatic engine stopping are fulfilled, said first and second relay switches are opened, respectively, thereby cutting the currents fed to said fuel control valve and said ignition coil.
Claim 6
Dependent Claim
49 words
An automatic engine stop and start system according to claim 1, comprising: means for opening said fuel control valve when said predetermined conditions for automatic engine stopping are fulfilled, whereby fuel is fed to the combustion engine through said slow port when the internal combustion engine is automatically started.
Claim 7
Dependent Claim
49 words
An automatic engine stop and start system according to claim 2, comprising: means for opening said fuel control valve when said predetermined conditions for automatic engine stopping are fulfilled, whereby fuel is fed to the combustion engine through said slow port when the internal combustion engine is automatically started.
Claim 8
Dependent Claim
49 words
An automatic engine stop and start system according to claim 3, comprising: means for opening said fuel control valve when said predetermined conditions for automatic engine stopping are fulfilled, whereby fuel is fed to the combustion engine through said slow port when the internal combustion engine is automatically started.
Claim 9
Dependent Claim
48 words
An automatic engine stop and start system according to claim 4, comprising: means for opening said fuel control valve when said predetermined conditions for automatic stopping are fulfilled, whereby fuel is fed to the combustion engine through said slow port when the internal combustion engine is automatically started.
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) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |