| 摘要 |
A concentric cylinder engine includes a toroidal outer cylinder having an inner cylinder contained therein, the inner cylinder wall comprising a sleeve assembly acting as a transfer valve. Each cylinder contains a piston, the two pistons being connected to a single crankshaft. The inner and outer piston crank throws are at least generally opposite one another, with the two pistons traveling in opposite directions during engine operation. The outer piston provides intake and compression functions, while the inner piston simultaneously provides power and exhaust functions. The concentric cylinder engine thus provides the four separate and distinct intake, compression, power, and exhaust phases of conventional Otto cycle engine operation during a single revolution of the crankshaft. The concentric cylinder engine may be constructed in multiple cylinder configurations having spark or compression ignition, in either liquid or air cooled embodiments. |
