How does a four-stroke marine diesel engine ignite its fuel, and what are the four sequential strokes of its operating cycle?

1. Compression ignition (autoignición por compresión): high cylinder compression heats intake air above fuel auto-ignition temperature; Strokes: Intake (Admisión), Compression (Compresión), Power (Combustión/Fuerza), Exhaust (Escape)
2. Spark ignition via electrical spark plugs; Strokes: Fueling, Heating, Exhaust, Cooling
3. Centrifugal ignition; Strokes: Rotation, Acceleration, Deceleration, Exhaust
4. Preheating with open flame; Strokes: Priming, Firing, Scavenging, Venting