During which engine stroke does the combustion process occur in a fuel injected engine?

In a fuel-injected engine, the combustion process occurs during the power stroke. This is the phase when the mixture of air and fuel is ignited, resulting in an explosion that forces the piston downward, thus generating the engine's power. This ignition is a critical step in the cycle, as the energy released from combustion is what ultimately drives the crankshaft, transforming linear motion into rotational motion that propels the vehicle.

During the induction stroke, the engine draws in the air-fuel mixture but does not yet initiate combustion. The compression stroke sees the piston moving upward, compressing that mixture, which prepares it for the combustion but does not involve any actual burning of fuel. Lastly, the exhaust stroke is when spent gases are expelled from the combustion chamber, marking the end of the cycle and not involving any combustion of fresh fuel. Therefore, it is during the power stroke that combustion is key to the engine's operation, making it the correct answer.