Patent US3821941A successfully refreshed from Google Patents.
US3821941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valving for internal combustion engine
Assignee: Individual
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Filing: 1973-01-02
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Granted: 1974-07-02
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Expires: 1993-01-02
Abstract
Abstract A modified stratified charge engine, having a unique pressure actuated inlet valve arrangement for controlling the induction of fuel and air into the combustion cylinder as a rapidly swirling mass, thereby to produce efficient combustion and, correspondingly, low exhaust emissions. An engine of the type described capable of operating with substantially equal efficiency, and without knock, on a wide range of octane rated fuels.
Inventors
- 👤 F Rychlik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:25
CPC Classifications
F; F02; F02B; F02B25/00; F02B2700/00; F02B2700/03; F02B2700/031
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
145 words
In an internal combustion engine having a housing formed with a fuel combustion cylinder, a reciprocating piston within the cylinder, a cylinder head capping the upper end of the cylinder, and an exhaust port formed throUgh the cylinder wall at a point remote from the cylinder head, the improvement comprising: a plurality of air inlet ports formed through said cylinder head; an air intake manifold mounted on said cylinder head for inducting air into said ports; and a plurality of pressure actuated flap valves mounted on the interior of said cylinder head and adapted to move arcuately into the cylinder to open said ports and adapted to seal against the interior of the cylinder head to close said ports, said valves when fully opened being disposed so as to direct substantially all of the incoming air into said cylinder tangentially in a circular swirl pattern.
Claim 2
Dependent Claim
145 words
In an internal combustion engine having a housing formed with a fuel combustion cylinder, a reciprocating piston within the cylinder, a cylinder head capping the upper end of the cylinder, and an exhaust port formed throUgh the cylinder wall at a point remote from the cylinder head, the improvement comprising: a plurality of air inlet ports formed through said cylinder head; an air intake manifold mounted on said cylinder head for inducting air into said ports; and a plurality of pressure actuated flap valves mounted on the interior of said cylinder head and adapted to move arcuately into the cylinder to open said ports and adapted to seal against the interior of the cylinder head to close said ports, said valves when fully opened being disposed so as to direct substantially all of the incoming air into said cylinder tangentially in a circular swirl pattern.
Claim 3
Dependent Claim
49 words
The engine of claim 1 including: adjustable magnetic bias means mounted in said cylinder head and effective to act on and to bias said pressure actuated valves toward a closed position and also effective to calibrate said valves to open for some predetermined pressure differential across said flap valves.
Claim 4
Dependent Claim
44 words
The engine of claim 1 including: means for retaining a cone of hot residual exhaust gases within said cylinder for mixing with the swirling mass of incoming fuel-air mixture to provide self-ignition of the mixture during the next succeeding power stroke of said piston.
Claim 5
Independent Claim
242 words
A method for controlling the combustion process within a two-stroke-cycle internal combustion engine having a housing formed with an internal cylindrical bore defining a combustion cylinder, a reciprocating piston disposed within the cylinder, a cylinder head defining an end wall for the combustion cylinder, a plurality of air inlet ports formed through the cylinder head, a plurality of pressure actuated air inlet flap valves mounted on the interior of the cylinder head and adapted to move arcuately into the cylinder to open the air inlet parts and adapted to seal against the interior of the cylinder head to close the air inlet ports, an air intake manifold connected to the cylinder head for providing air under pressure to the inlet ports, and an exhaust port formed through the cylinder wall at a pont remote from the cylinder head, the steps comprising: providing a fuel-air mixture to the air intake manifold; pressurizing the air intake manifold to cause induction of said mixture through said air inlet ports and said air inlet valves; deflecting said mixture with the air inlet valves into said cylinder as a rapidly swirling mass; using said inducted fuel-air mixture to expel exhaust gases through the exhaust port; entrapping a residual cone of hot exhaust gases above said piston; and mixing said entrapped exhaust gases with said fuel-air mixture during the compression stroke of said piston to cause self-ignition of said mixture for the next power stroke of said piston.
Claim 6
Independent Claim
242 words
A method for controlling the combustion process within a two-stroke-cycle internal combustion engine having a housing formed with an internal cylindrical bore defining a combustion cylinder, a reciprocating piston disposed within the cylinder, a cylinder head defining an end wall for the combustion cylinder, a plurality of air inlet ports formed through the cylinder head, a plurality of pressure actuated air inlet flap valves mounted on the interior of the cylinder head and adapted to move arcuately into the cylinder to open the air inlet parts and adapted to seal against the interior of the cylinder head to close the air inlet ports, an air intake manifold connected to the cylinder head for providing air under pressure to the inlet ports, and an exhaust port formed through the cylinder wall at a pont remote from the cylinder head, the steps comprising: providing a fuel-air mixture to the air intake manifold; pressurizing the air intake manifold to cause induction of said mixture through said air inlet ports and said air inlet valves; deflecting said mixture with the air inlet valves into said cylinder as a rapidly swirling mass; using said inducted fuel-air mixture to expel exhaust gases through the exhaust port; entrapping a residual cone of hot exhaust gases above said piston; and mixing said entrapped exhaust gases with said fuel-air mixture during the compression stroke of said piston to cause self-ignition of said mixture for the next power stroke of said piston.
Claim 7
Dependent Claim
146 words
An air intake valving system for a two-stroke-cycle engine having a housing with a combustion cylinder, a piston reciprocably disposed within the cylinder, a cylinder head, and an exhaust valve formed through the cylinder wall and adapted to be opened and closed by the reciprocating piston, the improvement comprising: a plurality of air inlet ports formed through said cylinder head and disposed in a circular array; a pressure actuated flap valve for each of said ports mounted on said head and adapted to move arcuately into the cylinder to open said ports and to deflect incoming air into the cylinder in a circular pattern during the time the exhaust port is opened by the piston; and means for entrapping a central cone of hot exhaust gases from a preceeding power stroke for mixing with the incoming air to cause selfignition of the next successive power stroke.
Claim 8
Dependent Claim
146 words
An air intake valving system for a two-stroke-cycle engine having a housing with a combustion cylinder, a piston reciprocably disposed within the cylinder, a cylinder head, and an exhaust valve formed through the cylinder wall and adapted to be opened and closed by the reciprocating piston, the improvement comprising: a plurality of air inlet ports formed through said cylinder head and disposed in a circular array; a pressure actuated flap valve for each of said ports mounted on said head and adapted to move arcuately into the cylinder to open said ports and to deflect incoming air into the cylinder in a circular pattern during the time the exhaust port is opened by the piston; and means for entrapping a central cone of hot exhaust gases from a preceeding power stroke for mixing with the incoming air to cause selfignition of the next successive power stroke.
Claim 9
Dependent Claim
34 words
The valving system of claim 5 including: fuel injection means for injecting fuel into the cylinder during the compression stroke of the piston and after the exhaust port has been closed by the piston.
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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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |