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US 12,416,270 B1Granted
Two stroke engine
OwnerDaniel J. Meyerinventor
Life of this patent
Estimating the term…
Abstract
A two stroke internal combustion engine contains an engine block, at least one power cylinder in the engine block, and at least one pump cylinder in the engine block associated with each power cylinder. A conduit communicates between an outlet of the pump cylinder and an inlet of the power cylinder. A timer coordinates movement of a piston in the power cylinder, a piston in the pump cylinder, and a valve in the conduit.
Claims45
A two stroke internal combustion engine comprising:
- at least one power cylinder, each said power cylinder having an inlet, an outlet, and a reciprocating power piston that creates a variable internal volume as it moves between an upward position and a downward position;
- at least one pump cylinder associated with each said power cylinder, each said pump cylinder having an inlet, an outlet, and a reciprocating pump piston that creates a variable internal volume, each said pump cylinder adapted to receive air, and no fuel, into the said pump cylinder as the said pump piston moves downwardly, and to pump the air, through an air transfer conduit and directly into the said power cylinder as the pump piston moves upwardly;
- said conduit communicating between the said outlet of the pump cylinder, and the said inlet of the power cylinder, the said conduit having at least one valve at the said inlet of the power cylinder, that opens as the said pump piston moves upwardly;
- a timer for coordinating movement of the said power piston, and the said pump piston;
- a fuel injector which injects only fuel, and no air, a portion of said fuel injected when the said power piston is near its Top Dead Center position, creating a mixture of fuel and air, in the said power cylinder;
- and
- a means for igniting the mixture in the said power cylinder when the said power piston is at its upward position, the burning and expansion of which, moves the said power piston downwardly, and produces work.
4 more elements
The claim of 1 wherein compression temperature is used for igniting the mixture in the said power cylinder.
The claim of 1 wherein a spark plug is used to ignite the said mixture of fuel and air in the power cylinder.
A two-stroke compression-ignition internal combustion engine comprising:
- at least one power cylinder, each said power cylinder having an inlet, an outlet, wherein said outlet of the said power cylinder is at least one exhaust port located in a side wall of the said power cylinder, the said side wall of the said power cylinder parallel to a longitudinal axis of the said power cylinder, and a reciprocating power piston that creates a variable internal volume as it moves between an upward position and a downward position;
- a pump cylinder associated with each said power cylinder, each said pump cylinder having an inlet, an outlet, and a reciprocating pump piston that creates a variable internal volume, each said pump cylinder adapted to receive air, and no fuel, into the said pump cylinder as the said pump piston moves downwardly, and to pump the air, and no fuel, into the said power cylinder as the said pump piston moves upwardly;
- a conduit communicating between the said outlet of the pump cylinder and the said inlet of the power cylinder, the said conduit having at least one valve at the said inlet of the power cylinder, that opens as the said pump piston moves upwardly;
- a timer for coordinating movement of the said power piston and the said pump piston;
- a fuel injector, which injects only fuel, and no air, into the said power cylinder, creating a mixture of fuel and air, in the said power cylinder;
- and
- compression temperature is used for igniting the mixture in the said power cylinder, the burning and expansion of which, moves the said power piston downwardly, and produces work.
4 more elements
A two stroke internal combustion engine comprising:
- at least one power cylinder, each said power cylinder having an inlet, an outlet, wherein said outlet of the said power cylinder is at least one exhaust port located in a side wall of the said power cylinder, the said side wall of the said power cylinder parallel to a longitudinal axis of the said power cylinder and a reciprocating power piston that creates a variable internal volume as it moves between an upward position and a downward position, wherein there is no crankcase ventilation/scavenging in said power cylinder during the complete two stroke cycle;
- at least one pump cylinder associated with each said power cylinder, each said pump cylinder having an inlet, an outlet, and a reciprocating pump piston that creates a variable internal volume, each said pump cylinder adapted to receive either air, or a mixture of fuel and air, into the said pump cylinder as the said pump piston moves downwardly and to pump the air, or mixture of fuel and air, into the said power cylinder as the pump piston moves upwardly;
- a conduit communicating between the said outlet of the pump cylinder, and the said inlet of the power cylinder, the said conduit having at least one poppet valve at the said inlet of the power cylinder, wherein the at least one poppet valve opens and closes the inlet of the said power cylinder only thru a single orifice;
- a timer for coordinating movement of the said power piston, and the said pump piston;
- a means for creating a mixture of fuel and air in the said power cylinder;
- wherein there is no fuel injector located in the side wall of the said power cylinder;
- and
- a means for igniting the mixture in the said power cylinder when the said power piston is at its upward position, the burning and expansion of which, moves the said power piston downwardly, and produces work.
5 more elements
Dependencies are inferred from the claim text.