Patent US4380978A successfully refreshed from Google Patents.
US4380978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic diesel fuel injector
Assignee: Boeing North American Inc
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Filing: 1980-04-22
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Granted: 1983-04-26
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Expires: 2000-04-22
Abstract
Abstract Precombustor 10 basically comprises electrostatic injector 12, combustion chamber 14, and glow plug 16. The precombustion chamber 14 basically comprises an injector port 40 for housing the electrostatic injector 12, an igniter port 42 for housing the glow plug 16, and a flow passage 44 substantially opposite the injector port 40 for conveying air into the precombustion chamber 14 and combusted gases out from the precombustion chamber 14. The combustion chamber 14 is enhanced by the incorporation of electrical insulation 46 and electrodes 48 along the interior wall of the precombustion chamber 14. The electrostatic fuel injector 12 basically comprises an electroconductive injector body 20 having at least one fuel inlet and at least one fuel outlet, means 22 and 23 for electrically insulating the injector body from the diesel engine, and a means 24 for charging the injector body in a range from about 10,000 to about 100,000 volts.
Inventors
- 👤 Bruce W. Maynard, Jr.
- 👤 William T. Webber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:02
CPC Classifications
F; F02; F02M; F02M27/00; F02M27/04; F02B; F02B19/00; F02B19/14; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
133 words
A precombustor for use in diesel engines comprises: a precombustion chamber comprising: an injector port for housing an electrostatic injector; an ignitor port for housing an ignition means; and a flow passage substantially opposite said injector port for conveying air into said precombustion chamber and combusted gases from said precombustor to a diesel cylinder; and an electrostatic fuel injector, comprising: an electroconductive injector body having at least one fuel inlet and at least one fuel outlet; means for electrically insulating said injector body from said diesel engine; and means for charging said injector body to more than about 10,000 volts; wherein the interior of said precombustion chamber further comprises electrical insulation; and wherein said precombustion chamber has at least one electrode located along the interior walls for attracting or repelling the fuel droplets.
Claim 2
Dependent Claim
133 words
A precombustor for use in diesel engines comprises: a precombustion chamber comprising: an injector port for housing an electrostatic injector; an ignitor port for housing an ignition means; and a flow passage substantially opposite said injector port for conveying air into said precombustion chamber and combusted gases from said precombustor to a diesel cylinder; and an electrostatic fuel injector, comprising: an electroconductive injector body having at least one fuel inlet and at least one fuel outlet; means for electrically insulating said injector body from said diesel engine; and means for charging said injector body to more than about 10,000 volts; wherein the interior of said precombustion chamber further comprises electrical insulation; and wherein said precombustion chamber has at least one electrode located along the interior walls for attracting or repelling the fuel droplets.
Claim 3
Dependent Claim
22 words
The electrostatic fuel injector of claim 1 wherein said injector body further comprises a check valve axially oriented within said injector body.
Claim 4
Dependent Claim
15 words
The electrostatic fuel injector of claim 2 wherein said check valve is a poppet valve.
Claim 5
Dependent Claim
15 words
The electrostatic fuel injector of claim 2 wherein said check valve is a pintle valve.
Claim 6
Dependent Claim
23 words
The electrostatic fuel injector of claim 1 wherein said means for electrically insulating said injector body from said diesel engine comprises insulating bushings.
Claim 7
Dependent Claim
34 words
The electrostatic fuel injector of claim 1 wherein said charging means, comprises: a voltage source of greater than about 10,000 volts; and a switching means interposed between said voltage source and said injector body.
Claim 8
Dependent Claim
15 words
The electrostatic fuel injector of claim 6 wherein said switching means is a rotary switch.
Claim 9
Dependent Claim
28 words
The electrostatic fuel injector of claim 6 wherein said charging means further comprises a high voltage capacitor matched to and connected in parallel with said high voltage source.
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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) | 1986-04-25 | 1986-10-25 | 1987-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-25 | 1990-10-25 | 1991-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-25 | 1994-10-25 | 1995-04-26 | $7700.00 | Window Closed / Lapsed |