4-cylinder 4-stroke IC engine ha relatively offset cranks, and timing sequence of 1-3-2-4 in non-equidistant ignition intervals, for distinctive 'sound' quality

摘要

The engine has a crankshaft with cranks (1,2,3,4) for the first and fourth cylinders, and the second and third cylinders, offset through 180[deg] relative to each other. The cranks for the first and third cylinder are offset relative to each other through 90[deg]. The engine has a timing sequence of 1-3-2-4 in non-equidistant ignition intervals 90[deg]-180[deg]-270[deg]-180[deg].