A new engine which incorporates the advantages found in a two-stroke with the advantages found in a four-stroke engine combined.

A new engine which incorporates the advantages found in a two-stroke with the advantages found in a four-stroke engine combined.

A telescopic piston for use with an internal combustion engine includes an inner piston; an outer piston located over the inner piston; an upper oil chamber formed between the inner piston and the outer piston; and an actuated valve having a controllable peak pressure that opens the actuated valve. A value of the peak pressure is wirelessly received at the telescopic piston.

A telescopic piston for use with an internal combustion engine includes an inner piston; an outer piston located over the inner piston; an upper oil chamber formed between the inner piston and the outer piston; and an actuated valve having a controllable peak pressure that opens the actuated valve. A value of the peak pressure is wirelessly received at the telescopic piston.

An internal combustion may include a cylinder having a first combustion chamber at one end and a second combustion chamber at an opposing end, first and second cylinder heads located at an end of the first and second combustion chambers, respectively, and a double-faced piston slidably mounted within the cylinder. The piston may be configured to move in the cylinder in a first stroke from one end to another. The first stroke may include an expansion stroke portion and a non-expansion stroke portion. The non-expansion stroke portion may include a momentum stroke portion. The non-expansion stroke portion may include a scavenging phase. The engine may further include first and second piston rod portions extending from opposite faces of the piston. Passageways in the piston rod portions may be configured to communicate gases between a combustion chamber and other locations.

An internal combustion may include a cylinder having a first combustion chamber at one end and a second combustion chamber at an opposing end, first and second cylinder heads located at an end of the first and second combustion chambers, respectively, and a double-faced piston slidably mounted within the cylinder. The piston may be configured to move in the cylinder in a work stroke from one end to another. The work stroke may include an expansion stroke portion, a momentum stroke portion, and a compression stroke portion. The engine may further include first and second piston rod portions extending from opposite faces of the piston. Passageways in the piston rod portions may be configured to communicate gases between a combustion chamber and a location outside the cylinder.

A telescopic piston for use with an internal combustion engine includes an inner piston; an outer piston located over the inner piston; an upper oil chamber formed between the inner piston and the outer piston; and an actuated valve having a controllable peak pressure that opens the actuated valve. A value of the peak pressure is wirelessly received at the telescopic piston.

A telescopic piston for use with an internal combustion engine includes an inner piston; an outer piston located over the inner piston; an upper oil chamber formed between the inner piston and the outer piston; and an actuated valve having a controllable peak pressure that opens the actuated valve. A value of the peak pressure is wirelessly received at the telescopic piston.

An internal combustion may include a cylinder having a first combustion chamber at one end and a second combustion chamber at an opposing end, first and second cylinder heads located at an end of the first and second combustion chambers, respectively, and a double-faced piston slidably mounted within the cylinder. The piston may be configured to move in the cylinder in a first stroke from one end to another. The first stroke may include an expansion stroke portion and a non-expansion stroke portion. The non-expansion stroke portion may include a momentum stroke portion. The non-expansion stroke portion may include a scavenging phase. The engine may further include first and second piston rod portions extending from opposite faces of the piston. Passageways in the piston rod portions may be configured to communicate gases between a combustion chamber and other locations.

An internal combustion may include a cylinder having a first combustion chamber at one end and a second combustion chamber at an opposing end, first and second cylinder heads located at an end of the first and second combustion chambers, respectively, and a double-faced piston slidably mounted within the cylinder. The piston may be configured to move in the cylinder in a work stroke from one end to another. The work stroke may include an expansion stroke portion, a momentum stroke portion, and a compression stroke portion. The engine may further include first and second piston rod portions extending from opposite faces of the piston. Passageways in the piston rod portions may be configured to communicate gases between a combustion chamber and a location outside the cylinder.