Patent ID: 9677464
Date: 2017-06-13
CPC Classifications: F01B,F01L,F02B

Claim:
1. A single-shaft dual expansion internal combustion engine, comprising: an engine block, a cylinder head, a single crankshaft, a control shaft and first, second and third multi-link connecting rod assemblies; first and second power cylinders and an expander cylinder being formed in the engine block; first and second power pistons being moveable in the first and second power cylinders, respectively, and being connected via the respective first and second multi-link connecting rod assemblies to respective first and second crankpins of the crankshaft; an expander piston being moveable in the expander cylinder and being connected via the third multi-link connecting rod assembly to a third crankpin of the crankshaft; and the first and second multi-link connecting rod assemblies being coupled to fourth pivot pins of respective first and second swing arms that are attached to the control shaft, and the third multi-link connecting rod assembly being attached to a fifth pivot pin of a third swing arm that is attached to the control shaft; wherein the third swing arm attaches to the control shaft at a position that is rotated 180 degrees about a rotational axis of the control shaft from an attaching location of the first and second swing arms.