US3661129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection apparatus
Assignee: Aisan Industry Co Ltd
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Filing: 1969-07-16
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Granted: 1972-05-09
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Expires: 1989-07-16
Abstract
Abstract A fuel injection apparatus including a fuel pump and an air pump. The outputs of the pumps interact and the output pressure of the air pump is controllable to thereby control the output of the fuel pump. In one embodiment, the air and fuel are injected separately into an intake cylinder of a spark-ignition combustion engine through opposing inlets, the inlets being aligned so that the injected air is directed toward the fuel inlet to control the amount of fuel entering the cylinder. In a second embodiment, the outputs from the pumps connect with a common fluid duct through which the mixed fuel and air are injected into the intake.
Inventors
- 👤 Junzo Uozumi
- 👤 Junki Iwata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:12
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/04; F02M69/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
156 words
Fuel-injection apparatus for use with an internal combustion engine having an air-intake conduit and a throttle valve for controlling the flow of air along an air-flow path through said conduit, said apparatus comprising: a fuel pump; an air pump; a fuel nozzle having an exit opening into said air-intake conduit; an air nozzle having an exit opening into said intake conduit; said exit openings being aligned so that air and fuel exiting from said exit openings collide in said air-flow path of said conduit at a collision zone; means for conveying fuel from said fuel pump to said fuel-nozzle exit opening; means for conveying air from said air pump to said air-nozzle exit opening; and, air pressure regulating means for regulating the pressure at which air is supplied from said air pump to said air nozzle exit opening and thereby regulating the pressure in said collision zone and the fuel flowing from said fuel-nozzle exit opening.
Claim 2
Dependent Claim
156 words
Fuel-injection apparatus for use with an internal combustion engine having an air-intake conduit and a throttle valve for controlling the flow of air along an air-flow path through said conduit, said apparatus comprising: a fuel pump; an air pump; a fuel nozzle having an exit opening into said air-intake conduit; an air nozzle having an exit opening into said intake conduit; said exit openings being aligned so that air and fuel exiting from said exit openings collide in said air-flow path of said conduit at a collision zone; means for conveying fuel from said fuel pump to said fuel-nozzle exit opening; means for conveying air from said air pump to said air-nozzle exit opening; and, air pressure regulating means for regulating the pressure at which air is supplied from said air pump to said air nozzle exit opening and thereby regulating the pressure in said collision zone and the fuel flowing from said fuel-nozzle exit opening.
Claim 3
Dependent Claim
87 words
Fuel-injection apparatus as claimed in claim 1 wherein said air pressure regulating means comprises: first and seconD pressure controllers; means for conveying to said controllers the pressure in said air-intake conduit; said first pressure controller being responsive to the pressure in said air-intake conduit for controlling the pressure of air supplied to said air-nozzle exit opening; and, means connected to said second controller for venting the discharge of said air pump to the atmosphere as said second controller is actuated by the pressure in said air-intake conduit.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |