Patent US3679185A successfully refreshed from Google Patents.
US3679185A
Expired / Lapsed
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Carburetor system having a fluidic proportional amplifier
Assignee: Compagnia Italiana Westinghouse Freni e Segnali
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Filing: 1969-09-17
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Granted: 1972-07-25
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Expires: 1989-09-17
Abstract
Abstract A carburetor having a fluidic proportioning device adapted to deliver fuel to an air-intake conduit in proportion to air pressure differential established across the control ports of the fluidic device by regions of different pressures established within the venturi shape of the air-intake conduit and the variable position of a throttle valve, the fluidic proportioning device including a first control port responsive to air pressure in an enlarged portion of the air-intake conduit, a second control port opposing the first control port and responsive to low air pressure in that portion of the air-intake conduit restricted by the throttle plate at low engine speeds and a third control port additively connected to the second control port and responsive to pressure within a narrow portion of the air-intake conduit.
Inventors
- 👤 Giancarlo Nardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:20
CPC Classifications
F; F02; F02M; F02M7/00; F02M7/10; F02M7/106; F02M7/02; F02M7/23; F15; F15C; F15C1/00; F15C1/002; F02B; F02B2275/00; F02B2275/14; Y; Y10; Y10S; Y10S123/00; Y10S123/10; Y10S261/00; Y10S261/69; Y10T; Y10T137/00; Y10T137/206; Y10T137/2229; Y10T137/224; Y10T137/2245
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
224 words
A fuel system for an internal combustion engine, comprising: a. an air-intake conduit having a diametrically enlarged portion at the intake end and a diametrically narrowed portion downstream of said enlarged portion for producing in the conduit a pressure differential varying with the rate of air flow through the conduit, b. a fuel reservoir, c. a fuel line, d. means for pumping fuel from said reservoir through said fuel line, e. a fluidic proportioning device including a supply port communicated with said fuel line, a pair of output ports, and a pair of opposing control pressure input ports each communicated with a different one of said diametrically enlarged portion and said diametrically narrowed portion of said air conduit, which when differentially pressurized so that the higher pressure in the diametrically enlarged portion is applied to a predetermined one of said pair of control pressure inputs, fuel is delivered from said supply port to one of said pair of output ports in Proportion to the pressure differential, f. a fuel nozzle opening internally of said air intake conduit, g. a delivery passage communicating said one of said pair of output ports with said fuel nozzle, h. a fuel idling passage communicating said fuel line to said fuel nozzle, and i. a fuel return passage communicating the other of said pair of outputs to said reservoir.
Claim 2
Dependent Claim
224 words
A fuel system for an internal combustion engine, comprising: a. an air-intake conduit having a diametrically enlarged portion at the intake end and a diametrically narrowed portion downstream of said enlarged portion for producing in the conduit a pressure differential varying with the rate of air flow through the conduit, b. a fuel reservoir, c. a fuel line, d. means for pumping fuel from said reservoir through said fuel line, e. a fluidic proportioning device including a supply port communicated with said fuel line, a pair of output ports, and a pair of opposing control pressure input ports each communicated with a different one of said diametrically enlarged portion and said diametrically narrowed portion of said air conduit, which when differentially pressurized so that the higher pressure in the diametrically enlarged portion is applied to a predetermined one of said pair of control pressure inputs, fuel is delivered from said supply port to one of said pair of output ports in Proportion to the pressure differential, f. a fuel nozzle opening internally of said air intake conduit, g. a delivery passage communicating said one of said pair of output ports with said fuel nozzle, h. a fuel idling passage communicating said fuel line to said fuel nozzle, and i. a fuel return passage communicating the other of said pair of outputs to said reservoir.
Claim 3
Dependent Claim
37 words
A carburetion system, as recited in claim 1, in which said fuel nozzle includes: a. a mixing chamber communicated with said fuel idling passage and said delivery passage, and b. means communicating said mixing chamber with atmosphere.
Claim 4
Dependent Claim
156 words
A carburetion system, comprising: a. an air-intake conduit having a body and a passage therethrough, b. said body having a flat surface on the exterior thereof, c. a fluidic proportioning device including a member having a flat surface, d. a plurality of grooves in said flat surface, e. said member fixedly attached to said body with said flat surface of said member engaging said flat surface of said body, f. said grooves forming with said flat surface of said air-intake conduit a chamber radially communicated with a plurality of generally radially disposed passages, g. said chamber comprising a stream interaction chamber, h. said radially disposed passages comprising a supply passage, control pressure passages and output passages, and i. a plurality of passages in said body, each opening at one end to said conduit passage and opening at the other end at said flat surface of said body in communication with a different one of said grooves.
Claim 5
Dependent Claim
156 words
A carburetion system, comprising: a. an air-intake conduit having a body and a passage therethrough, b. said body having a flat surface on the exterior thereof, c. a fluidic proportioning device including a member having a flat surface, d. a plurality of grooves in said flat surface, e. said member fixedly attached to said body with said flat surface of said member engaging said flat surface of said body, f. said grooves forming with said flat surface of said air-intake conduit a chamber radially communicated with a plurality of generally radially disposed passages, g. said chamber comprising a stream interaction chamber, h. said radially disposed passages comprising a supply passage, control pressure passages and output passages, and i. a plurality of passages in said body, each opening at one end to said conduit passage and opening at the other end at said flat surface of said body in communication with a different one of said grooves.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |