Piston rod and free piston engine
First Claim
1. A linear reciprocating engine, comprising:
- a cylinder having a first combustion chamber at a first end of the cylinder and a second combustion chamber at an opposing second end of the cylinder;
a piston slidably mounted within the cylinder;
a piston rod having a passageway extending through the piston into both the first and second combustion chambers;
at least one first opening in a first side of the piston rod configured to move into and out of the first combustion chamber to selectively communicate gas to the first combustion chamber; and
at least one second opening in a second side of the piston rod configured to move into and out of the second combustion chamber to selectively communicate gas to the second combustion chamber,wherein the piston is slidable between a first position where the first opening is outside the first combustion chamber and the second opening is inside the second combustion chamber, and a second position where the first opening is inside the first combustion chamber and the second opening is outside the second combustion chamber.
2 Assignments
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Accused Products
Abstract
An internal combustion engine may include an engine block, a cylinder defining at least one combustion chamber, and a piston in the cylinder. The piston may travel in a first stroke from one end to an opposite end of the cylinder, and may be sized relative to the cylinder to enable an expansion stroke portion of the first stroke while the piston travels under gas expansion pressure, and a momentum stroke portion of the first stroke for the remainder of the first stroke following the expansion stroke portion. A passageway may be formed in the piston rod to communicate gas flow between a first combustion chamber and an area external to the cylinder when the piston is in a first position, and to communicate gas flow between a second combustion chamber and an area external to the cylinder when the piston is in a second position.
68 Citations
20 Claims
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1. A linear reciprocating engine, comprising:
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a cylinder having a first combustion chamber at a first end of the cylinder and a second combustion chamber at an opposing second end of the cylinder; a piston slidably mounted within the cylinder; a piston rod having a passageway extending through the piston into both the first and second combustion chambers; at least one first opening in a first side of the piston rod configured to move into and out of the first combustion chamber to selectively communicate gas to the first combustion chamber; and at least one second opening in a second side of the piston rod configured to move into and out of the second combustion chamber to selectively communicate gas to the second combustion chamber, wherein the piston is slidable between a first position where the first opening is outside the first combustion chamber and the second opening is inside the second combustion chamber, and a second position where the first opening is inside the first combustion chamber and the second opening is outside the second combustion chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification