Final answer:
The term used to describe pulses of air flowing from the engine out the air intake due to the time interval between intake events with a four-cylinder engine is called 'intake strokes'.
Step-by-step explanation:
The term used to describe pulses of air flowing from the engine out the air intake due to the time interval between intake events with a four-cylinder engine is called 'intake strokes'. During the intake stroke of the four-stroke internal combustion gasoline engine, air is mixed with fuel. This occurs when the piston moves downward, drawing air-fuel mixture into the combustion chamber through the intake valve. These intake strokes occur during the intake phase of the engine cycle, which is one of the four cycles in the four-stroke internal combustion engine.