US4434766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air assist device of fuel injection type internal combustion engine
Assignee: Toyota Motor Corp
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Filing: 1982-08-23
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Granted: 1984-03-06
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Expires: 2002-08-23
Abstract
Abstract In an air assist device of a fuel injection type internal combustion engine, having an air assisted injector provided close to a nozzle thereof with an adapter constituting an assist air introducing portion, in which assist air introduced into the assist air introducing portion through assist air intake ports formed in the peripheral wall of the adapter is blown out of an assist air jet formed at the bottom of the adapter together with fuel so as to facilitate the atomization of fuel, the diameter of each opening of the assist air intake ports is made smaller than the diameter of an opening of the assist air jet, the assist air intake ports are provided in a plural number, so that the total opening area of the assist air intake ports can be made larger than the opening area of the assist air jet, and/or the assist air intake ports are penetrated in directions tangential to the inner wall surface of the adapter.
Inventors
- 👤 Hiroki Matsuoka
- 👤 Yuichi Kato
- 👤 Minoru Iwata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:45
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/04; F02M69/047; F02M69/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
119 words
An air assist device of a fuel injection type internal combustion engine, comprising: an air assisted injector for blowing out assist air together with fuel to facilitate the atomization of fuel; and an adapter having an annular peripheral wall containing a plurality of assist air intake ports constituting an assist air introducing portion close to a nozzle of said air assisted injector and having at the bottom of said wall an assist air jet opening, wherein the diameter of each opening of the assist air intake ports is smaller than the diameter of the assist air jet opening, the total opening area of the assist air intake ports being larger than the area of the assist air jet opening.
Claim 2
Dependent Claim
119 words
An air assist device of a fuel injection type internal combustion engine, comprising: an air assisted injector for blowing out assist air together with fuel to facilitate the atomization of fuel; and an adapter having an annular peripheral wall containing a plurality of assist air intake ports constituting an assist air introducing portion close to a nozzle of said air assisted injector and having at the bottom of said wall an assist air jet opening, wherein the diameter of each opening of the assist air intake ports is smaller than the diameter of the assist air jet opening, the total opening area of the assist air intake ports being larger than the area of the assist air jet opening.
Claim 3
Dependent Claim
66 words
An air assist device of a fuel injection type internal combustion engine as set forth in claim 1, wherein the diameter of each opening of the plurality of assist air intake ports is smaller than the minimum effective diameter of said assist air jet opening, and the total opening area of said ports is larger than the maximum effective area of said assist air jet opening.
Claim 4
Dependent Claim
44 words
An air assist device of a fuel injection type internal combustion engine as set forth in claim 1 or 2, wherein said plurality of assist air intake ports are disposed at symmetrical positions with respect to the axial line of said air assisted injector.
Claim 5
Dependent Claim
41 words
An air assist device of a fuel injection type internal combustion engine as set forth in claim 1 or 2, wherein said plurality of assist air intake ports are penetrated in directions tangential to the inner wall surface of said adapter.
Claim 6
Dependent Claim
40 words
An air assist device of a fuel injection type internal combustion engine as set forth in claim 4, wherein the assist air outlet sides of said assist air intake ports are contracted as compared with the assist air inlet sides.
Claim 7
Dependent Claim
41 words
An air assist device of a fuel injection type internal combustion engine as set forth in claim 1 or 2, wherein said plurality of assist air intake ports are penetrated in directions perpendicular to the inner wall surface of said adapter.
Claim 8
Dependent Claim
37 words
An air assist device of a fuel injection type internal combustion engine as set forth in claim 1 or 2, wherein each opening of said plurality of assist air intake ports is formed into a round shape.
Claim 9
Dependent Claim
101 words
An air assist device of a fuel injection type internal combustion engine, comprising: an air assisted injector for blowing out assist air together with fuel to facilitate the atomization of fuel; and an adapter having an annular peripheral wall of large thickness and containing assist air intake ports constituting an assist air introducing portion close to a nozzle of said air assisted injector and having at the bottom of said wall an assist air jet, wherein said assist air intake ports are penetrated in directions tangential to the inner surface of said wall, and wherein each of said ports converge inwardly.
Claim 10
Dependent Claim
101 words
An air assist device of a fuel injection type internal combustion engine, comprising: an air assisted injector for blowing out assist air together with fuel to facilitate the atomization of fuel; and an adapter having an annular peripheral wall of large thickness and containing assist air intake ports constituting an assist air introducing portion close to a nozzle of said air assisted injector and having at the bottom of said wall an assist air jet, wherein said assist air intake ports are penetrated in directions tangential to the inner surface of said wall, and wherein each of said ports converge inwardly.
Claim 11
Dependent Claim
33 words
An air assist device of a fuel injection type internal combustion engine as set forth in claim 8, wherein each opening of said assist air intake ports is formed into a round shape.
References Cited (Backward Citations)
US4006719A
Cited
US4216753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |