US3779218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition timing change-over device for spark advance mechanism having rotatable governor plate
Assignee: Nissan Motor Co Ltd
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Filing: 1970-10-22
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Granted: 1973-12-18
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Expires: 1990-10-22
Abstract
Abstract An ignition timing change-over device adapted for use with a spark advance mechanism having a rotatable governor plate. A plunger means is adapted to protrude and rotate the governor plate to an angular position in which an ignition advance occurs during the cold operating conditions of the engine irrespective of the intake manifold vacuum. In one embodiment, the plunger means is actuated to hold the governor plate in the advance position during closure of a starting switch. Another embodiment employs a relay and a thermostatically controlled switch to keep the plunger means in the advance position during the engine warmup operation. A further embodiment comprises a thermostatically operated plunger which is operative to rotate the governor plate through a mechanical linkage during the engine warm-up operation.
Inventors
- 👤 S Nambu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:53
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/145; F02P5/155; F02P5/1558; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
232 words
An ignition timing change-over device designed to provide a normal retarded condition during warm-up operation of an internal combustion engine, which is adapted for use with a spark advance mechanism having a rotatable governor plate, said device comprising, in combination, A. a d.c. voltage source, B. a relay means electrically connected to said d.c. voltage source, C. a solenoid means elecrically connected through said relay means to said d.c. voltage source and having a plunger means provided in abutting eNgagement with said governor plate for mechanically rotating said governor plate to an angular position that advances the ignition timing ahead of top dead center during cold starting of said engine, D. a starting switch which electrically connects a starting motor to: 1. said d.c. voltage source, 2. an ignition switch, and 3. said relay means, and E. a thermostatically controlled switch electrically connected between said d.c. voltage source and said relay means for opening and closing said relay means, said thermostatically controlled switch being responsive to the engine temperature, whereby, when said engine temperature is below a predetermined value during cold starting of said engine, said thermostatically controlled switch closes said relay means thereby energizing said solinoid means to cause said plunger means to rotate said governor plate for thereby advancing said ignition timing relative to the normal retarded condition to increase engine performance efficiency during said cold starting of said engine.
Claim 2
Dependent Claim
232 words
An ignition timing change-over device designed to provide a normal retarded condition during warm-up operation of an internal combustion engine, which is adapted for use with a spark advance mechanism having a rotatable governor plate, said device comprising, in combination, A. a d.c. voltage source, B. a relay means electrically connected to said d.c. voltage source, C. a solenoid means elecrically connected through said relay means to said d.c. voltage source and having a plunger means provided in abutting eNgagement with said governor plate for mechanically rotating said governor plate to an angular position that advances the ignition timing ahead of top dead center during cold starting of said engine, D. a starting switch which electrically connects a starting motor to: 1. said d.c. voltage source, 2. an ignition switch, and 3. said relay means, and E. a thermostatically controlled switch electrically connected between said d.c. voltage source and said relay means for opening and closing said relay means, said thermostatically controlled switch being responsive to the engine temperature, whereby, when said engine temperature is below a predetermined value during cold starting of said engine, said thermostatically controlled switch closes said relay means thereby energizing said solinoid means to cause said plunger means to rotate said governor plate for thereby advancing said ignition timing relative to the normal retarded condition to increase engine performance efficiency during said cold starting of said engine.
Claim 3
Dependent Claim
4 words
an ignition switch, and
Claim 4
Dependent Claim
4 words
an ignition switch, and
Claim 5
Dependent Claim
4 words
an ignition switch, and
Claim 6
Dependent Claim
4 words
an ignition switch, and
Claim 7
Dependent Claim
73 words
a solenoid coil connected in series to said d.c. voltage source, C. a solenoid means electrically connected through said relay means to said d.c. voltage source and having a plunger means in abutting engagement with said governor plate for mechanically rotating said governor plate in a direction that advances ignition timing ahead of top dead center during cold starting of said engine, D. a starting switch which electrically connects a starting motor to:
Claim 8
Dependent Claim
73 words
a solenoid coil connected in series to said d.c. voltage source, C. a solenoid means electrically connected through said relay means to said d.c. voltage source and having a plunger means in abutting engagement with said governor plate for mechanically rotating said governor plate in a direction that advances ignition timing ahead of top dead center during cold starting of said engine, D. a starting switch which electrically connects a starting motor to:
Claim 9
Dependent Claim
69 words
An ignition timing change-over device as claimed in claim 1, wherein said relay means includes a normally open switch connected in series between said solenoid means and said d.c. voltage source and a solenoid coil connected in series to said d.c. voltage source through said thermostatically controlled switch for closing said normally open switch when the engine temperature is below the predetermined value during starting condition of the engine.
Claim 10
Dependent Claim
100 words
said relay means, and E. a thermostatically controlled switch electrically connected between said d.c. voltage source and said relay means for opening and closing said relay means, said thermostatically controlled switch being responsive to the engine temperature, whereby, when said engine temperature is below a predetermined value during cold starting of said engine, said thermostatically controlled switch closes said relay means thereby energizing said solinoid means to cause said plunger means to rotate said governor plate for thereby advancing said ignition timing relative to the normal retarded condition to increase engine performance efficiency during said cold starting of said engine.
Claim 11
Dependent Claim
100 words
said relay means, and E. a thermostatically controlled switch electrically connected between said d.c. voltage source and said relay means for opening and closing said relay means, said thermostatically controlled switch being responsive to the engine temperature, whereby, when said engine temperature is below a predetermined value during cold starting of said engine, said thermostatically controlled switch closes said relay means thereby energizing said solinoid means to cause said plunger means to rotate said governor plate for thereby advancing said ignition timing relative to the normal retarded condition to increase engine performance efficiency during said cold starting of said engine.
Claim 12
Dependent Claim
69 words
An ignition timing change-over device as claimed in claim 1, wherein said thermostatically controlled switch includes a pair of normally closed contact members, one of which is of a bimetal plate adapted to warp toward the other contact member when the engine temperature sensed thereby is below the predetermined value and to break contact with said other contact member when the engine temperature sensed thereby exceeds said predetermined value.
Claim 13
Dependent Claim
171 words
said relay means, said starting switch and said ingition switch being closed simultaneously to start said engine, and E. a thermostatically controlled switch electrically connected between said solenoid coil of said relay means and said d.c. voltage source, said thermostatically controlled switch including a pair of normally closed contact members, one of which pair is of a bimetal plate adapted to warp toward the other contact member when the engine temperature sensed thereby is below a predetermined value during engine starting and to break contact with said other contact member when the engine temperature sensed thereby exceeds the predetermined value during engine starting, said solenoid coil of said relay means being energized when said contact members of said thermostatically controlled switch are closed, whereby said normally opern switch of said relay means is closed to energize said solenoid means for causing said plunger means of said solenoid means to rotate said ignitiOn timing relative to the normal retarded condition thereof, thereby increasing engine performance efficiency during cold starting of said engine.
Claim 14
Dependent Claim
171 words
said relay means, said starting switch and said ingition switch being closed simultaneously to start said engine, and E. a thermostatically controlled switch electrically connected between said solenoid coil of said relay means and said d.c. voltage source, said thermostatically controlled switch including a pair of normally closed contact members, one of which pair is of a bimetal plate adapted to warp toward the other contact member when the engine temperature sensed thereby is below a predetermined value during engine starting and to break contact with said other contact member when the engine temperature sensed thereby exceeds the predetermined value during engine starting, said solenoid coil of said relay means being energized when said contact members of said thermostatically controlled switch are closed, whereby said normally opern switch of said relay means is closed to energize said solenoid means for causing said plunger means of said solenoid means to rotate said ignitiOn timing relative to the normal retarded condition thereof, thereby increasing engine performance efficiency during cold starting of said engine.
Claim 15
Dependent Claim
65 words
In an ignition system for an internal combustion engine having a spark advance mechanism provided with a rotatable governor plate, an ignition timing change-over device designed to provide a normal retarded condition when cold starting said engine and during warm-up operation thereof, which is adapted for use with said rotatable governor plate, comprising, in combination, A. a d.c. voltage source, B. a relay means having
Claim 16
Dependent Claim
65 words
In an ignition system for an internal combustion engine having a spark advance mechanism provided with a rotatable governor plate, an ignition timing change-over device designed to provide a normal retarded condition when cold starting said engine and during warm-up operation thereof, which is adapted for use with said rotatable governor plate, comprising, in combination, A. a d.c. voltage source, B. a relay means having
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |