초록 ▼

A two-stroke internal combustion engine is disclosed having opposed cylinders, each cylinder having a pair of opposed pistons, with all the pistons connected to a common central crankshaft. The inboard pistons of each cylinder are connected to the crankshaft with pushrods and the outboard pistons ar

A two-stroke internal combustion engine is disclosed having opposed cylinders, each cylinder having a pair of opposed pistons, with all the pistons connected to a common central crankshaft. The inboard pistons of each cylinder are connected to the crankshaft with pushrods and the outboard pistons are connected to the crankshaft with pullrods. This configuration results in a compact engine with a very low profile, in which the free mass forces can be essentially totally balanced. The engine configuration also allows for asymmetrical timing of the intake and exhaust ports through independent angular positioning of the eccentrics on the crankshaft, making the engine suitable for supercharging.

대표청구항 ▼

[ What is claimed is:] [1.] An internal combustion engine comprising a single crankshaft and two opposed cylinders, each cylinder having two opposed pistons; wherein the single crankshaft has asymmetrically arranged journals, pushrods and pullrods for driving the journals from the pistons, each cyli

[ What is claimed is:] [1.] An internal combustion engine comprising a single crankshaft and two opposed cylinders, each cylinder having two opposed pistons; wherein the single crankshaft has asymmetrically arranged journals, pushrods and pullrods for driving the journals from the pistons, each cylinder has air inlet ports and exhaust ports, the pistons in each cylinder operate to open its exhaust ports before its air intake ports and close them before its air intake ports close, and wherein the geometrical configurations and the masses of those parts are selected so as to minimize the dynamic imbalance of the engine during its operation.