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Patent US4160916A successfully refreshed from Google Patents.
US4160916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine stop-start electrical circuit
Assignee: Caterpillar Inc
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Filing: 1977-09-12
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Granted: 1979-07-10
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Expires: 1997-09-12
Abstract
Abstract An electrical circuit for use with an engine having an alternator has a relay to control a solenoid to properly shut down a diesel engine and includes openable and closable contacts for supplying power to another portion of the circuit, it being ensured that such contacts remain closed when either the vehicle key is in the on position or there exists an alternator output.
Inventors
- 👤 Stamos I. Papasideris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:26
CPC Classifications
F; F02; F02N; F02N11/00; F02N11/08; F02N11/0803; F02B; F02B3/00; F02B3/06; Y; Y10; Y10S; Y10S123/00; Y10S123/11
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
68 words
An electrical circuit for controlling an engine, comprising: (a) electrical power source means for starting and turning off the engine; (b) an engine shut-off solenoid being energizable only after turning off the engine; and (c) means for generating current on start-up of the engine and after turning off the engine and for energizing said shut-off solenoid with said current that is generated after the turning off the engine.
Claim 2
Dependent Claim
68 words
An electrical circuit for controlling an engine, comprising: (a) electrical power source means for starting and turning off the engine; (b) an engine shut-off solenoid being energizable only after turning off the engine; and (c) means for generating current on start-up of the engine and after turning off the engine and for energizing said shut-off solenoid with said current that is generated after the turning off the engine.
Claim 3
Dependent Claim
24 words
An electrical circuit according to claim 1, wherein said generating means is electrically coupled to said power source means during shut-off of the engine.
Claim 4
Dependent Claim
56 words
An electrical circuit according to claim 1, wherein said means for generating includes: (a) first relay means for controlling the closing of a path to said shut-off solenoid in response to engine turn-off; and (b) second relay means for closing the path to said shut-off solenoid in response to the current being generated after engine turn-off.
Claim 5
Dependent Claim
26 words
An electrical circuit according to claim 3, wherein said second relay means includes: (a) a first relay having contacts; and (b) a second relay having contacts.
Claim 6
Dependent Claim
111 words
An electrical circuit for controlling an engine, comprising: (a) electrical power source means for starting and turning off the engine; (b) means for generating current on start-up of the engine and after turning off the engine; (c) energizable means for shutting off the engine; (d) first relay means for controlling the closing of a path from said current generating means to said energizable means and said power source means in response to turning off the engine; and (e) second relay means for closing the path from said current generating means to said energizable means and said power source means in response to the current being generated after turning off the engine.
Claim 7
Dependent Claim
111 words
An electrical circuit for controlling an engine, comprising: (a) electrical power source means for starting and turning off the engine; (b) means for generating current on start-up of the engine and after turning off the engine; (c) energizable means for shutting off the engine; (d) first relay means for controlling the closing of a path from said current generating means to said energizable means and said power source means in response to turning off the engine; and (e) second relay means for closing the path from said current generating means to said energizable means and said power source means in response to the current being generated after turning off the engine.
Claim 8
Dependent Claim
42 words
An electrical circuit according to claim 5, wherein said second relay means includes: (a) a first relay having contacts and being connected to said current generating means; and (b) a second relay having contacts and being connected to said current generating means.
Claim 9
Dependent Claim
41 words
An electrical circuit according to claim 6, wherein said first relay means includes a third relay having contacts, said third relay being connected to said power source means and said contacts of said third relay being connected to said first relay.
Claim 10
Dependent Claim
15 words
An electrical circuit according to claim 5, wherein said current generating means includes an alternator.
Claim 11
Dependent Claim
27 words
An electrical circuit according to claim 5, wherein said power source means includes: (a) a battery; and (b) an openable and closeable switch connected to said battery.
References Cited (Backward Citations)
US3398731A
Cited
US3781651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-09 | 1983-01-08 | 1983-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-09 | 1987-01-08 | 1987-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-09 | 1991-01-08 | 1991-07-10 | $7700.00 | Window Closed / Lapsed |