US3608872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine fuel supply having separate air and fuel mixing bores
Assignee: Aisan Industry Co Ltd
•
Filing: 1969-07-10
•
Granted: 1971-09-28
•
Expires: 1989-07-10
Abstract
Abstract A fuel supply system for an internal combustion engine, said system having a performance equal to that of a two-stage carburetor over a wide range of operation from small to large fuel requirements. The system has a first bore for regulating the inflow of air and a second parallel bore for mixing fuel with air. A throttle valve is provided in each bore and one of the throttle valves is connected to a fuel metering device. Metered fuel is injected into the fuel mixing bore at a Venturi that has a diameter considerably less than the diameter of the air inflow bore. In a second device, the fuel injection system controls fuel quantity by air jet pressure. In the last embodiment, the fuel metering device comprises pure fluid amplifiers which are controlled by pressure within the fuel and air mixing bore.
Inventors
- 👤 Junzo Uozumi
- 👤 Toshikazu Suzuki
- 👤 Kaneo Kuno
- 👤 Kazuo Kikuchi
- 👤 Junki Iwata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:12
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/002; F02; F02M; F02M7/00; F02M7/10; F02M7/106; F02M7/12; Y; Y10; Y10S; Y10S261/00; Y10S261/69; Y10T; Y10T137/00; Y10T137/206; Y10T137/2076; Y10T137/212; Y10T137/2125; Y10T137/2142; Y10T137/2147
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
217 words
In a fuel supply system for an internal combustion engine, the iMprovement comprising: a first bore for regulating the inflow of air, said first bore forming a first airflow path along which operation of said internal combustion engine causes an airflow; a second bore for mixing fuel with air, said second bore forming a second airflow path along which operation of said internal combustion engine causes an airflow; said first and second bores merging into a single third bore at a merge zone located at downstream ends of said first and second bores; a throttle means in at least one of said bores; a fuel pump; an air pump; a fuel injection nozzle having an exit opening in said second bore; an air injection nozzle having an exit opening in said second bore; said exit openings being aligned whereby air and fuel exiting from said openings collide in said second airflow path of said second bore; means responsive to said fuel pump for supplying fuel to said injection nozzle; and, means responsive to said air pump for supplying air to said air injection nozzle including an air pressure-regulating means for regulating the pressure at which said air is supplied to said air injection nozzle and thereby regulating the fuel flowing from said fuel injection nozzle exit opening.
Claim 2
Dependent Claim
217 words
In a fuel supply system for an internal combustion engine, the iMprovement comprising: a first bore for regulating the inflow of air, said first bore forming a first airflow path along which operation of said internal combustion engine causes an airflow; a second bore for mixing fuel with air, said second bore forming a second airflow path along which operation of said internal combustion engine causes an airflow; said first and second bores merging into a single third bore at a merge zone located at downstream ends of said first and second bores; a throttle means in at least one of said bores; a fuel pump; an air pump; a fuel injection nozzle having an exit opening in said second bore; an air injection nozzle having an exit opening in said second bore; said exit openings being aligned whereby air and fuel exiting from said openings collide in said second airflow path of said second bore; means responsive to said fuel pump for supplying fuel to said injection nozzle; and, means responsive to said air pump for supplying air to said air injection nozzle including an air pressure-regulating means for regulating the pressure at which said air is supplied to said air injection nozzle and thereby regulating the fuel flowing from said fuel injection nozzle exit opening.
References Cited (Backward Citations)
GB189618280A
Cited
US1974585A
Cited
US2223381A
Cited
US2430693A
Cited
US2638330A
Cited
US2751425A
Cited
US2789801A
Cited
US2976024A
Cited
US3187732A
Cited
US3282573A
Cited
US3406951A
Cited
US3389894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |