US 11,280,293 B2 · Internal combustion engine

Abstract

An internal combustion engine includes a hollow cylinder, a piston within the hollow cylinder, and a cylinder head. A base valve assembly at a base of the hollow cylinder permits or restricts fluid flow from an intake manifold into a sub-chamber below the piston. The piston includes at least one intake port connecting a combustion chamber above the piston with the sub-chamber, and a transfer valve that opens and closes the at least one intake port. When the transfer valve opens the at least one intake port, fluid is permitted to flow from the sub-chamber to the combustion chamber. The internal combustion engine operates according to a four-stroke piston cycle, wherein multiple intake stages are provided. The intake stages may include intake of air into the sub-chamber during a compression stroke, transfer of air from the sub-chamber to the combustion chamber during a power stroke, intake of air-fuel mixture into the sub-chamber during an exhaust stroke, and transfer of air-fuel mixture from the sub-chamber to the combustion chamber during an intake stroke.

Claims20

Dependent claims

An internal combustion engine, comprising:

a hollow cylinder;
a cylinder head;
at least one exhaust valve disposed in the cylinder head for discharge of exhaust gases;
at least one fuel injector;
a piston within the hollow cylinder, the piston having at least one intake port that provides a passage for fluid flow through the piston from a sub-chamber below the piston to a combustion chamber above the piston;
a transfer valve disposed within a transfer valve housing of the piston, the transfer valve being configured to render the at least one intake port of the piston in an opened or closed state;
a base valve assembly disposed at a base of the cylinder that opens and closes to permit or restrict fluid flow into the sub-chamber below the piston;
wherein the internal combustion engine operates according to a four-stroke piston cycle including multiple fluid intake stages;
wherein during at least a first fluid intake stage the at least one exhaust valve is closed and the at least one intake port of the piston is in the opened state and fluid flows from the sub-chamber below the piston to the combustion chamber above the piston;
wherein fluid flow from the sub-chamber to a crank case is prevented.

7 more elements

Dependencies are inferred from the claim text.

Internal combustion engine

Life of this patent

Internal combustion engine

Life of this patent

Abstract

Claims20