US3580231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve mechanisms for use with internal combustion engines
Assignee: Simms Group Research and Development Ltd
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Filing: 1969-02-11
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Granted: 1971-05-25
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Expires: 1989-02-11
Abstract
Abstract An internal combustion engine has a main cylinder and piston for receiving part of the main charge of combustible mixture for operating the engine, a subsidiary cylinder interconnected with the main cylinder by a passage, a valve controlling the passage so that part of the charge in the main cylinder passes into the subsidiary cylinder during the compression stroke of the main piston, a subsidiary piston in the subsidiary cylinder for increasing the compression of the part of the charge in the subsidiary cylinder, an additional fuel inlet to the subsidiary cylinder and a control mechanism for operating the valve, subsidiary piston and fuel inlet in timed relation.
Inventors
- 👤 Cyril Henry Bradbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:02
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/06; F02B19/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
159 words
A piston and cylinder device for an internal combustion engine comprising a main cylinder, a main piston cooperative therein, fuel introduction means to introduce into the cylinder a main charge of combustible mixture for operating the engine, a subsidiary cylinder, a passageway interconnecting the main cylinder and the subsidiary cylinder, a valve operable to open and close said passageway, a piston cooperable with the subsidiary cylinder, fuel injection means for supplying additional fuel to the subsidiary cylinder, and means to operate the valve, the subsidiary piston and the fuel injection means in timed relation to the main piston, so that during the compression stroke a part of the main charge enters the subsidiary cylinder after which the valve is closed, the part of the charge is compressed by the subsidiary piston, the fuel injection means injects fuel into the subsidiary cylinder to ignite the charge and then the valve is opened to ignite the charge in the main cylinder.
Claim 2
Dependent Claim
159 words
A piston and cylinder device for an internal combustion engine comprising a main cylinder, a main piston cooperative therein, fuel introduction means to introduce into the cylinder a main charge of combustible mixture for operating the engine, a subsidiary cylinder, a passageway interconnecting the main cylinder and the subsidiary cylinder, a valve operable to open and close said passageway, a piston cooperable with the subsidiary cylinder, fuel injection means for supplying additional fuel to the subsidiary cylinder, and means to operate the valve, the subsidiary piston and the fuel injection means in timed relation to the main piston, so that during the compression stroke a part of the main charge enters the subsidiary cylinder after which the valve is closed, the part of the charge is compressed by the subsidiary piston, the fuel injection means injects fuel into the subsidiary cylinder to ignite the charge and then the valve is opened to ignite the charge in the main cylinder.
Claim 3
Dependent Claim
64 words
A piston and cylinder device as claimed in claim 1 in which the timing of the means to operate the valve and the subsidiary piston, and the compression in the subsidiary cylinder are such that the pressure therein is raised to a sufficient level to cause ignition of the part of the charge when the fuel injection means injects fuel into the subsidiary cylinder.
Claim 4
Dependent Claim
38 words
A piston and cylinder device as claimed in claim 2 in which the subsidiary cylinder is located at one end of the main cylinder with said passage extending through the end faces of the main and subsidiary cylinders.
Claim 5
Dependent Claim
50 words
A piston and cylinder device as claimed in claim 3 in which the said valve member includes a closure member arranged to cooperate with a valve seat at the end of the subsidiary cylinder adjacent the main cylinder and a valve stem extending through a passage in the subsidiary piston.
Claim 6
Dependent Claim
128 words
A piston and cylinder device for an internal combustion engine comprising a main cylinder and cooperating main piston for receiving at least part of the main charge of combustible mixture for operating the engine, a subsidiary cylinder located at one end of the main cylinder and interconnected with the main cylinder by a passage, the end of the subsidiary cylinder adjacent to the main cylinder being conical in shape, a valve controlling said passage so that part of the charge in the main cylinder passes into the subsidiary cylinder during the compression stroke of the main piston, a subsidiary piston in said subsidiary cylinder for increasing the compression of the part of the charge in the subsidiary cylinder and means for supplying additional fuel to the subsidiary cylinder.
Claim 7
Dependent Claim
128 words
A piston and cylinder device for an internal combustion engine comprising a main cylinder and cooperating main piston for receiving at least part of the main charge of combustible mixture for operating the engine, a subsidiary cylinder located at one end of the main cylinder and interconnected with the main cylinder by a passage, the end of the subsidiary cylinder adjacent to the main cylinder being conical in shape, a valve controlling said passage so that part of the charge in the main cylinder passes into the subsidiary cylinder during the compression stroke of the main piston, a subsidiary piston in said subsidiary cylinder for increasing the compression of the part of the charge in the subsidiary cylinder and means for supplying additional fuel to the subsidiary cylinder.
Claim 8
Dependent Claim
31 words
A piston and cylinder device as claimed in claim 5 in which the face of the subsidiary piston which faces said end of the subsidiary cylinder is also conical in shape.
Claim 9
Dependent Claim
37 words
A piston and cylinder device as claimed in claim 5 in which the fuel inlet to the subsidiary cylinder is arranged parallel to the conical end face of the subsidiary cylinder and is diverted towards said passage.
Claim 10
Dependent Claim
103 words
A piston and cylinder device as claimed in claim 5 in which control mechanism is provided for controlling the time of operation of the said valve, subsidiary piston and fuel inlet to the subsidiary cylinder so that the said valve is open during part of the compression stroke of the main piston and then closes, the subsidiary piston then moves through its compression stroke while The main piston completes its compression stroke, the fuel inlet then admits additional fuel to the compressed charge in the subsidiary cylinder and then on ignition of the charge in the subsidiary cylinder, the said valve opens again.
Claim 11
Dependent Claim
26 words
A piston and cylinder device as claimed in claim 8 in which an inlet valve for the main cylinder is also controlled by said control mechanism.
Claim 12
Dependent Claim
15 words
An internal combustion engine including a piston and cylinder device as claimed in claim 1.
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |