| 摘要 |
<p>An engine comprising:
a crankshaft, rotating about a crankshaft axis of the engine;
an expansion piston slidably received within an expansion cylinder and operatively connected to the crankshaft such that the expansion piston reciprocates through an expansion stroke and an exhaust stroke of a four stroke cycle during a single rotation of the crankshaft;
a compression piston slidably received within a compression cylinder and operatively connected to the crankshaft such that the compression piston reciprocates through an intake stroke and a compression stroke of the same four stroke cycle during the same rotation of the crankshaft; and
a crossover passage interconnecting the compression and expansion cylinders, the crossover passage including an inlet valve and a crossover valve defining a pressure chamber therebetween; wherein:
the crossover valve closes as the expansion piston descends from its top dead center position to its bottom dead center position;
combustion of the gas within the expansion cylinder is started after the expansion piston reaches its top dead center position during the expansion stroke; and
the crossover valve remains open during at least a portion of a combustion event in the expansion cylinder.</p> |
