Final answer:
In a four-stroke internal combustion engine, it takes four strokes of the piston to complete one cycle: intake, compression, power, and exhaust. However, in an ideal diesel cycle, it takes five strokes: intake, compression, power, adiabatic power, and exhaust.
Step-by-step explanation:
The number of strokes of the piston to complete one cycle of events depends on the type of engine being considered. In the case of a four-stroke internal combustion engine, it takes four strokes of the piston to complete one cycle of events. These strokes are:
- Intake stroke: Air-fuel mixture is drawn into the cylinder as the piston descends.
- Compression stroke: The air-fuel mixture is compressed adiabatically, raising its temperature.
- Power stroke: The air-fuel mixture is ignited, leading to an increase in pressure, and the piston descends to do work on the gas.
- Exhaust stroke: The hot gas is expelled from the cylinder as the piston moves up.
However, in the case of an ideal diesel cycle, it takes five strokes of the piston to complete one cycle.
- Intake stroke: Only air is drawn into the chamber.
- Compression stroke: The air is compressed adiabatically.
- Power stroke: Fuel is added and ignited to do work on the gas.
- Adiabatic power stroke: The piston descends, and the gas does work by exerting force.
- Exhaust stroke: The pressure drops as the gas is expelled.