Exhaust valve timing for split-cycle engine

An engine comprising:

• a crankshaft rotatable about a crankshaft axis;
• 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 during a single rotation of the crankshaft;
• 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 during a single rotation of the crankshaft;
• a crossover passage interconnecting the compression and expansion cylinders, the crossover passage including at least a crossover expansion valve disposed therein;
• and
• an exhaust valve through which exhaust gasses can be evacuated from the expansion cylinder;
• wherein the crossover expansion valve is opened between about 0 CA degrees and about 15 CA degrees after the exhaust valve is closed.