US4294208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Atomizing shock wave precombustor
Assignee: Boeing North American Inc
•
Filing: 1980-03-31
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Granted: 1981-10-13
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Expires: 2000-03-31
Abstract
Abstract A precombustor 10 for use in diesel engines comprises a precombustion chamber 12, a fuel spray nozzle port 18 through which a fuel spray nozzle 20 may be incorporated into the precombustion chamber 12, an igniter port 22 for an ignition means adjacent to said spray nozzle port 18, and a supersonic DeLaval nozzle 14 integrally incorporated into the precombustion chamber 12 opposite said spray nozzle port 18 for enhancing the injection of air into the precombustion chamber 12. Axially connected to the throat area of the DeLaval nozzle 14 is a two-dimensional subsonic diffuser 34 and flow passage 30 for transferring air from the diesel piston to the precombustion chamber 12 and combustion gases from the precombustion chamber 12 into the diesel cylinder.
Inventors
- 👤 William R. Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:35
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/14; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
66 words
A precombustor for use in diesel engines, comprising: a precombustion chamber; a fuel spray nozzle port through which a fuel spray nozzle may be incorporated into said precombustion chamber; a port for an ignition means adjacent to said spray nozzle port; and a supersonic DeLaval nozzle integrally incorporated into said precombustion chamber opposite said spray nozzle, for enhancing the injection of air into said precombustion chamber.
Claim 2
Dependent Claim
66 words
A precombustor for use in diesel engines, comprising: a precombustion chamber; a fuel spray nozzle port through which a fuel spray nozzle may be incorporated into said precombustion chamber; a port for an ignition means adjacent to said spray nozzle port; and a supersonic DeLaval nozzle integrally incorporated into said precombustion chamber opposite said spray nozzle, for enhancing the injection of air into said precombustion chamber.
Claim 3
Dependent Claim
11 words
The precombustor of claim 1 wherein said precombustion chamber is cylindrical.
Claim 4
Dependent Claim
22 words
The precombustor of claim 2 wherein said precombustion chamber has a length-to-diameter ratio in the range from about 2 to about 5.
Claim 5
Dependent Claim
16 words
The precombustor of claim 3 wherein said precombustion chamber has a length-to-diameter ratio of about 31/2.
Claim 6
Dependent Claim
14 words
The precombustor of claim 2 wherein said precombustion chamber further comprises a dome-shaped top.
Claim 7
Dependent Claim
20 words
The precombustor of claim 2 wherein said spray nozzle port is axially located through the top of said precombustion chamber.
Claim 8
Dependent Claim
16 words
The precombustor of claim 1 wherein said fuel spray nozzle is a penciltype fuel injection nozzle.
Claim 9
Dependent Claim
13 words
The precombustor of claim 1 wherein said ignition means is a glow plug.
Claim 10
Dependent Claim
12 words
The precombustor of claim 2 wherein said DeLaval nozzie is axially oriented.
Claim 11
Dependent Claim
14 words
The precombustor of claim 2 wherein said DeLaval nozzle comprises a curved supersonic nozzle.
Claim 12
Dependent Claim
16 words
The precombustor of claims 9 or 10 wherein said DeLaval nozzle further comprises an axisymmetric diffuser.
Claim 13
Dependent Claim
21 words
The precombustor of claim 1 further comprising a two-dimensional subsonic diffuser axially connected to the throat of said supersonic DeLaval nozzle.
Claim 14
Dependent Claim
21 words
The precombustor of claim 1 further comprising a two-dimensional sonic diffuser axially connected to the throat of said supersonic DeLaval nozzle.
Claim 15
Dependent Claim
21 words
The precombustor of claim 1 further comprising a two-dimensional supersonic diffuser axially connected to the throat of said supersonic DeLaval nozzle.
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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) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |