US3880131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection system for an internal combustion engine
Assignee: Bendix Corp
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Filing: 1973-06-28
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Granted: 1975-04-29
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Expires: 1993-06-28
Abstract
Abstract Fuel injection apparatus for an internal combustion engine in which separate electro-mechanical control valves are operated to begin and end each fuel injection period in timed relation to the internal combustion engine by closing off the spill path to begin an injection period and by opening the spill path to end the injection period.
Inventors
- 👤 Russell William Twaddell
- 👤 Edwin Ben Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:19
CPC Classifications
F; F02; F02M; F02M41/00; F02M41/08; F02M41/14; F02M41/1405; F02M41/02; F02M41/06; F02M59/00; F02M59/20; F02M59/36; F02M59/366
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A fuel injection system for an internal combustion engine having a pumping unit for pressurizing fuel; a distributor connected to the pumping unit and receiving fuel under pressure from the pumping unit for delivery in timed sequence to the engine; and a pair of electro-magnetic valves receiving fuel under pressure from the pumping unit and connected to a spill path, and means for providing electrical signals in timed relation to the engine to operate one valve to close the spill path to begin a fuel injection period to the engine and to operate the other valve to open the spill path to end the fuel injection period.
Claim 2
Dependent Claim
107 words
A fuel injection system for an internal combustion engine having a pumping unit for pressurizing fuel; a distributor connected to the pumping unit and receiving fuel under pressure from the pumping unit for delivery in timed sequence to the engine; and a pair of electro-magnetic valves receiving fuel under pressure from the pumping unit and connected to a spill path, and means for providing electrical signals in timed relation to the engine to operate one valve to close the spill path to begin a fuel injection period to the engine and to operate the other valve to open the spill path to end the fuel injection period.
Claim 3
Dependent Claim
26 words
A fuel injection system as described in claim 1 in which only two electro-magnetic valves are required irrespective of the number of cylinders in the engine.
Claim 4
Dependent Claim
20 words
A fuel injection system as described in claim 1 in which both valves are closed during the fuel injection perIod.
Claim 5
Dependent Claim
20 words
A fuel injection system as described in claim 3 in which both valves are energized during a fuel injection period.
Claim 6
Dependent Claim
40 words
A fuel injection system as described in claim 1 in which the means for pressurizing the fuel are reciprocating pistons operated by a cam in timed relation to the engine to periodically pressurize the fuel during a fuel injection period.
Claim 7
Dependent Claim
34 words
A fuel injection system as described in claim 1 in which the means for providing electrical signals comprises a rotor timed to the engine crank shaft and a plurality of trigger coils associated therewith.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |