US3604405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injectors
Assignee: Individual
•
Filing: 1969-05-07
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Granted: 1971-09-14
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Expires: 1989-05-07
Abstract
Abstract An apparatus for the delivery of metered charges of pressurized fuel to the cylinders of an internal-combustion engine at timed intervals; by employing the alternating gaseous pressures developed within the combustion chambers of the engine. The pneumatically operated injector pumps, which are conjoined to the individual cylinders of the engine and the primary fuel supply system, replace the conventional mechanical or electrically driven components. Fuel to air ratio is controlled by the variable pressure applied to the diaphragms of the injector pumps and by the calibration of the fuel-flow metering discs of the injector nozzles.
Inventors
- 👤 William A Maher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:50
CPC Classifications
F; F02; F02D; F02D9/00; F02M; F02M59/00; F02M59/02; F02M59/10; F02M59/107; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0261; F02D2700/0266; F02M2700/00; F02M2700/13; F02M2700/1317; F02M2700/1341
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
334 words
A system for injecting fuel to each cylinder of a multicylinder engine having at least two cylinders comprising a fuel supply, a fuel manifold having at least two branches, pump means for delivering fuel from said fuel supply to said manifold at a rate depending on the rate of fuel consumption by the engine, injector pump means including a hollow fluidtight casing, a movable wall in said hollow casing forming two fluidtight chambers, a fuel inlet and a fuel outlet for one of said chambers, a gas inlet for the other of said chambers, a connection between said fuel inlet and one of said branches, an adapter of tubular form secured in a port opening into each cylinder, an injection nozzle secured in each of said adapters, a fuel metering restriction at the outlet of each said nozzle, a check valve at the fuel inlet of each said nozzle, a fluid connection between said fuel outlet from said chamber of each said injector pump means and said fuel inlet of each said nozzle, means to force fuel through the said metering restriction of each said nozzle in timed relation with the charging stroke of each cylinder including a conduit connecting a said gas inlet of each said injector pump means for each cylinder with a said adapter of a first cylinder preceding in sequence according to firing order so as to pressurize said chambers of an injector pump means for second cylinder following in timed sequence according to firing order during the power stroke of said first cylinder and force fuel through the said nozzle of said second cylinder, and means to modify the degree of pressurization in said chambers during injection as a function of engine load, means including a gas outlet port, one for each cylinder, means operated by intake manifold suction for restricting each said port to a lesser degree as suction increases and a greater degree as suction decreases, and a connection between each said port and each said conduit.
Claim 2
Independent Claim
334 words
A system for injecting fuel to each cylinder of a multicylinder engine having at least two cylinders comprising a fuel supply, a fuel manifold having at least two branches, pump means for delivering fuel from said fuel supply to said manifold at a rate depending on the rate of fuel consumption by the engine, injector pump means including a hollow fluidtight casing, a movable wall in said hollow casing forming two fluidtight chambers, a fuel inlet and a fuel outlet for one of said chambers, a gas inlet for the other of said chambers, a connection between said fuel inlet and one of said branches, an adapter of tubular form secured in a port opening into each cylinder, an injection nozzle secured in each of said adapters, a fuel metering restriction at the outlet of each said nozzle, a check valve at the fuel inlet of each said nozzle, a fluid connection between said fuel outlet from said chamber of each said injector pump means and said fuel inlet of each said nozzle, means to force fuel through the said metering restriction of each said nozzle in timed relation with the charging stroke of each cylinder including a conduit connecting a said gas inlet of each said injector pump means for each cylinder with a said adapter of a first cylinder preceding in sequence according to firing order so as to pressurize said chambers of an injector pump means for second cylinder following in timed sequence according to firing order during the power stroke of said first cylinder and force fuel through the said nozzle of said second cylinder, and means to modify the degree of pressurization in said chambers during injection as a function of engine load, means including a gas outlet port, one for each cylinder, means operated by intake manifold suction for restricting each said port to a lesser degree as suction increases and a greater degree as suction decreases, and a connection between each said port and each said conduit.
Claim 3
Dependent Claim
95 words
The combination of components as formulated in claim 1 and including a positive means for controlling the temperature of the fuel contained within the fuel chambers of the injector pumps by the medium of a synchronous ingress of air from the atmosphere through the one-way flow check valves attached to the pressure chambers of the injector pumps, said ingress of cooling air from the atmosphere is automatically timed by the cycles of the preceding and connecting cylinder to precede and insulate the pressure chambers of the injector pumps from the heat of the pressurized gases.
References Cited (Backward Citations)
US1314561A
Cited
US1737813A
Cited
US2008998A
Cited
US2062644A
Cited
US2157034A
Cited
US3213839A
Cited
US3406667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |