US3919985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable size torch nozzle for internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1974-01-21
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Granted: 1975-11-18
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Expires: 1994-01-21
Abstract
Abstract A three-valve spark-ignition internal combustion piston engine has an auxiliary chamber connected to each main combustion chamber through a torch nozzle. The intake valve for the auxiliary chamber is provided with an apertured skirt for varying the effective size of the torch nozzle under turning movement of the intake valve stem, controlled by intake vacuum pressure of the engine.
Inventors
- 👤 Shizuo Yagi
- 👤 Yasuhito Sato
- 👤 Kiyoshi Miyaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:56
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/10; F02B19/1019; F02B19/1023; F02B19/1028; F02B19/1047; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
In a spark-ignition internal combustion piston engine having a main combustion chamber and an auxiliary combustion chamber connected by a torch nozzle, and having means including a first intake passage for delivering a lean mixture to the main chamber and means including a second intake passage for delivering a rich mixture to the auxiliary chamber, the improvement comprising, in combination: an auxiliary intake valve assembly positioned to control flow through the second intake passage into the auxiliary chamber, said intake valve assembly having a movable valve element, a skirt on said movable valve element extending into said auxiliary chamber near the torch nozzle, means for moving said valve element axially to open and close said intake valve assembly, and means for turning said movable valve element to cause the skirt to vary the effective size of the torch nozzle.
Claim 2
Dependent Claim
139 words
In a spark-ignition internal combustion piston engine having a main combustion chamber and an auxiliary combustion chamber connected by a torch nozzle, and having means including a first intake passage for delivering a lean mixture to the main chamber and means including a second intake passage for delivering a rich mixture to the auxiliary chamber, the improvement comprising, in combination: an auxiliary intake valve assembly positioned to control flow through the second intake passage into the auxiliary chamber, said intake valve assembly having a movable valve element, a skirt on said movable valve element extending into said auxiliary chamber near the torch nozzle, means for moving said valve element axially to open and close said intake valve assembly, and means for turning said movable valve element to cause the skirt to vary the effective size of the torch nozzle.
Claim 3
Dependent Claim
23 words
The combination set forth in claim 1 in which the latter said means is responsive to vacuum pressure in said first intake passage.
Claim 4
Dependent Claim
162 words
In a spark-ignition internal combustion piston engine having a main combustion chamber and an auxiliary combustion chamber connected by a torch nozzle, and having means including a first intake passage for delivering a lean mixture to the main chamber and means including a second intake passage for delivering a rich mixture to the auxiliary chamber, the improvement comprising, in combination: an auxiliary intake valve assembly positioned to control flow through the second intake passage into the auxiliary chamber, said intake valve assembly having a stationary seat and having a stem provided with an enlarged head for closing axially against the seat, a skirt on the enlarged head projecting away from said stem and into said auxiliary chamber near the torch nozzle, means including a cam for moving the stem axially to open and close the valve head with respect to the stationary seat, and means for turning the stem to cause the skirt to vary the effective size of the torch nozzle.
Claim 5
Dependent Claim
162 words
In a spark-ignition internal combustion piston engine having a main combustion chamber and an auxiliary combustion chamber connected by a torch nozzle, and having means including a first intake passage for delivering a lean mixture to the main chamber and means including a second intake passage for delivering a rich mixture to the auxiliary chamber, the improvement comprising, in combination: an auxiliary intake valve assembly positioned to control flow through the second intake passage into the auxiliary chamber, said intake valve assembly having a stationary seat and having a stem provided with an enlarged head for closing axially against the seat, a skirt on the enlarged head projecting away from said stem and into said auxiliary chamber near the torch nozzle, means including a cam for moving the stem axially to open and close the valve head with respect to the stationary seat, and means for turning the stem to cause the skirt to vary the effective size of the torch nozzle.
Claim 6
Independent Claim
91 words
The method of operating an internal combustion piston engine having a main combustion chamber and an auxiliary combustion chamber connected by a torch nozzle, comprising the steps of: delivering a lean air-fuel mixture to the main chamber, delivering a rich air-fuel mixture to the auxiliary chamber, spark-igniting the mixture in the auxiliary chamber to project a flame through the torch nozzle into the main chamber, cyclically controlling the flow of rich air-fuel mixture into the auxiliary chamber, and reducing the effective size of the torch nozzle as the engine load increases.
Claim 7
Independent Claim
91 words
The method of operating an internal combustion piston engine having a main combustion chamber and an auxiliary combustion chamber connected by a torch nozzle, comprising the steps of: delivering a lean air-fuel mixture to the main chamber, delivering a rich air-fuel mixture to the auxiliary chamber, spark-igniting the mixture in the auxiliary chamber to project a flame through the torch nozzle into the main chamber, cyclically controlling the flow of rich air-fuel mixture into the auxiliary chamber, and reducing the effective size of the torch nozzle as the engine load increases.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |