Patent US3853097A successfully refreshed from Google Patents.
US3853097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torch nozzle orientation for internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1973-04-23
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Granted: 1974-12-10
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Expires: 1993-04-23
Abstract
Abstract A four-cycle internal combustion engine employs a main combustion chamber supplied with a lean combustible mixture and an auxiliary combustion chamber supplied with a rich combustible mixture. A torch nozzle restriction connects the chambers. A spark plug is associated with the auxiliary chamber. A thin wall heat resistant cup spaced from the engine walls forms the auxiliary chamber and the cup is provided with apertures communicating with the main chamber and the spark plug. The main chamber is non-symmetrical and has its greatest depth between the torch nozzle restriction and the axis of the cylinder bore in which the piston reciprocates. The direction of the principal axis of the torch flame through the restriction is toward the center of mass of the air-fuel mixture in the main chamber when the piston is 90* past top dead center.
Inventors
- 👤 T Kume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:50
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/10; F02B19/1004; F02B19/1014; F02B1/00; F02B1/02; F02B1/04; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B2275/00; F02B2275/20; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S123/00; Y10S123/09
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
176 words
In a spark-ignition internal combustion engine for minimizing unwanted emissions such as HC and CO, the engine having a crankconnected piston movable in a cylinder bore, the combination of: walls cooperating with the movable piston to form a main combustion chamber, walls forming a cavity laterally offset from the cylinder axis, a thin wall heat resistant cup positioned within the cavity and having a portion exposed to the main combustion chamber, said portion of said cup having an aperture constituting the sole torch nozzle restriction establishing communication between said chambers, a spark plug for igniting a combustible mixture in the auxiliary chamber to project a flame through the torch nozzle restriction, the torch nozzle restriction being positioned to cause the axis of the torch flame to pass near the center of mass of the air-fuel mixture in the main chamber when the piston is 90* past top dead center, the axis of the torch flame being spaced from said center of mass by an amount no greater than 16/100 of the diameter of the cylinder bore.
Claim 2
Dependent Claim
176 words
In a spark-ignition internal combustion engine for minimizing unwanted emissions such as HC and CO, the engine having a crankconnected piston movable in a cylinder bore, the combination of: walls cooperating with the movable piston to form a main combustion chamber, walls forming a cavity laterally offset from the cylinder axis, a thin wall heat resistant cup positioned within the cavity and having a portion exposed to the main combustion chamber, said portion of said cup having an aperture constituting the sole torch nozzle restriction establishing communication between said chambers, a spark plug for igniting a combustible mixture in the auxiliary chamber to project a flame through the torch nozzle restriction, the torch nozzle restriction being positioned to cause the axis of the torch flame to pass near the center of mass of the air-fuel mixture in the main chamber when the piston is 90* past top dead center, the axis of the torch flame being spaced from said center of mass by an amount no greater than 16/100 of the diameter of the cylinder bore.
Claim 3
Dependent Claim
167 words
In a spark-ignition internal combustion engine for minimizing unwanted emissions such as HC and CO, the engine having a crank-connected piston movable in a cylinder bore, the combination of: walls cooperating with the movable piston to form a main combustion chamber, walls forming an auxiliary combustion chamber laterally offset from the cylinder axis, a torch nozzle restriction establishing communication between said chambers, the main chamber being non-symmetrical and having its greatest depth between said torch nozzle Restriction and the cylinder axis, a spark plug for igniting a combustible mixture in the auxiliary chamber to project a flame through the torch nozzle restriction, the torch nozzle restriction being positioned to cause the axis of the torch flame to pass near the center of mass of the air-fuel mixture in the main chamber when the piston is 90* past top dead center, the axis of the torch flame being spaced from said center of mass by an amount no greater than 16/100 of the diameter of the cylinder bore.
Claim 4
Dependent Claim
167 words
In a spark-ignition internal combustion engine for minimizing unwanted emissions such as HC and CO, the engine having a crank-connected piston movable in a cylinder bore, the combination of: walls cooperating with the movable piston to form a main combustion chamber, walls forming an auxiliary combustion chamber laterally offset from the cylinder axis, a torch nozzle restriction establishing communication between said chambers, the main chamber being non-symmetrical and having its greatest depth between said torch nozzle Restriction and the cylinder axis, a spark plug for igniting a combustible mixture in the auxiliary chamber to project a flame through the torch nozzle restriction, the torch nozzle restriction being positioned to cause the axis of the torch flame to pass near the center of mass of the air-fuel mixture in the main chamber when the piston is 90* past top dead center, the axis of the torch flame being spaced from said center of mass by an amount no greater than 16/100 of the diameter of the cylinder bore.
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |