Engine with work stroke and gas exchange through piston rod
AssigneeAquarius Engines (A.M.) Ltd.
InventorShaul Haim Yaakoby
Life of this patent
Estimating the term…
Abstract
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.
Claims20
An internal combustion engine, comprising:
- a cylinder having a first combustion chamber at a first end and a second combustion chamber at a second end;
- a first cylinder head located at an end of the first combustion chamber;
- a second cylinder head located at an end of the second combustion chamber;
- a double-faced piston slidably mounted within the cylinder and configured to move in a first work stroke from the first end of the cylinder to the second end of the cylinder, wherein the first work stroke includes a first expansion stroke portion during which chemical energy from combustion in the first combustion chamber is converted into mechanical power of the piston as the piston travels to an exhaust port of the cylinder, a first momentum stroke portion during which the piston continues to move toward the second end of the cylinder after the piston reaches the exhaust port and gases are exchanged between the first combustion chamber and a location outside the cylinder, and a first compression stroke portion during which the piston compresses gases in the second combustion chamber,
- wherein the cylinder and the piston are sized such that a total distance of the first work stroke is greater than that of the first expansion stroke portion, the first momentum stroke portion, or the first compression stroke portion.
An internal combustion engine, comprising:
- a cylinder having a first combustion chamber at a first end and a second combustion chamber at a second end;
- an exhaust port in a wall of the cylinder;
- a first cylinder head located at an end of the first combustion chamber;
- a second cylinder head located at an end of the second combustion chamber;
- a double-faced piston slidably mounted within the cylinder and configured to move in a first work stroke from the first end of the cylinder to the second end of the cylinder, and to move in a work second stroke from the second end of the cylinder to the first end of the cylinder, wherein the first work stroke includes a first expansion stroke portion during which chemical energy from combustion in the first combustion chamber is converted into mechanical power of the piston up until the piston reaches the exhaust port, a first momentum stroke portion during which the piston continues to move toward the second end of the cylinder past the exhaust port and gases are exchanged between the first combustion chamber and a location outside the cylinder, and a first compression stroke portion during which the piston compresses gases in the second combustion chamber, and wherein the second work stroke includes a second expansion stroke portion, a second momentum stroke portion, and a second compression stroke portion,
- wherein the cylinder and the piston are sized such that a total distance of the first work stroke is greater than that of the first expansion stroke portion, the first momentum stroke portion, or the first compression stroke portion.
Dependencies are inferred from the claim text.