Patent US4913111A successfully refreshed from Google Patents.
US4913111A
Expired / Lapsed
US
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Turbulence generator for two-stroker spark-assisted diesel engines
Assignee: Yamaha Marine Co Ltd
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Filing: 1988-06-27
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Granted: 1990-04-03
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Expires: 2008-06-27
Abstract
Abstract A combustion chamber for a spark assisted diesel engine embodying a main combustion chamber and an energy cell. Fuel is injected into the main chamber and into the energy cell and combustion is initiated in the main chamber. The energy cell communicates with the main chamber through a restricted orifice and the increased pressure of the combustion causes auto ignition in the energy cell to generate a high velocity charge out of the energy cell into the main chamber through the orifice for generating turbulence to insure complete combustion.
Inventors
- 👤 Susumu Ariga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:37
CPC Classifications
F; F02; F02B; F02B61/00; F02B61/04; F02B61/045; F02B21/00; F02B23/00; F02B23/02; F02B23/04; F02B23/08; F02B23/10; F02B23/101; F02B75/00; F02B75/16; F02B2023/103; F02B2023/108; F02B75/02; F02B2075/022; F02B2075/025; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
144 words
A combustion chamber for an internal combustion engine comprising a main chamber portion, an energy cell portion of substantially smaller volume than said main chamber portion and communicating with said main chamber portion through a restricted orifice, a single fuel injection nozzle delivering a fuel charge into said main chamber portion in a direction away from said energy cell and another fuel charge directed toward and into said energy cell portion, and means for initiating combustion in said combustion chamber in said main chamber portion prior to combustion said energy cell for increasing the pressure in said energy cell portion prior to combustion therein for subsequently effecting combustion therein to effect a high velocity flow from said energy cell into said main chamber portion during the expansion stroke through said orifice to generate turbulence therein after combustion in the main chamber portion has begun.
Claim 2
Dependent Claim
144 words
A combustion chamber for an internal combustion engine comprising a main chamber portion, an energy cell portion of substantially smaller volume than said main chamber portion and communicating with said main chamber portion through a restricted orifice, a single fuel injection nozzle delivering a fuel charge into said main chamber portion in a direction away from said energy cell and another fuel charge directed toward and into said energy cell portion, and means for initiating combustion in said combustion chamber in said main chamber portion prior to combustion said energy cell for increasing the pressure in said energy cell portion prior to combustion therein for subsequently effecting combustion therein to effect a high velocity flow from said energy cell into said main chamber portion during the expansion stroke through said orifice to generate turbulence therein after combustion in the main chamber portion has begun.
Claim 3
Dependent Claim
23 words
A combustion chamber as set forth in claim 1 wherein the combustion is initiated and at least initially maintained by a diesel cycle.
Claim 4
Dependent Claim
40 words
A combustion chamber as set forth in claim 2 wherein the fuel injection nozzle has a plurality of ports discharging into the main chamber portion and a lesser number of ports discharging into the energy cell portion through the orifice.
Claim 5
Dependent Claim
34 words
A combustion chamber as set forth in claim 1 wherein the main chamber portion is defined in part by a surface of revolution, the orifice being offset from the generating axis of said surface.
Claim 6
Dependent Claim
32 words
A combustion chamber as set forth in claim 3 wherein the fuel injection nozzle has only one of the ports being directed toward the orifice for delivering fuel to the energy cell.
Claim 7
Dependent Claim
23 words
A combustion chamber as set forth in claim 5 wherein the fuel injection nozzle has a plurality of orifices discharging in different directions.
Claim 8
Dependent Claim
20 words
A combustion chamber as set forth in claim 3 further including means for generating a swirl in the combustion chamber.
Claim 9
Dependent Claim
28 words
A combustion chamber as set forth in claim 7 wherein the means for generating the swirl comprises an intake passage for generating a swirl to the intake charge.
Claim 10
Dependent Claim
18 words
A combustion chamber as set forth in claim wherein the swirl is disposed about a vertically extending axis.
Claim 11
Dependent Claim
16 words
A combustion chamber as set forth in claim 7 wherein the swirl has an axial component.
Claim 12
Dependent Claim
21 words
A combustion chamber as set forth in claim 5 further including a spark plug for initiating combustion within the combustion chamber.
Claim 13
Dependent Claim
22 words
A combination chamber as set forth in claim 11 wherein the spark plug has its gap positioned within the surface of revolution.
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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) | 1993-04-02 | 1993-10-02 | 1994-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-02 | 1997-10-02 | 1998-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-02 | 2001-10-02 | 2002-04-03 | $7700.00 | Window Closed / Lapsed |