In an internal combustion engine, the translational motion of the piston, due to the work of the gas pressure force

In an internal combustion engine, the translational motion of the piston, due to the work of the gas pressure force, is converted into rotational motion of the shaft. In which of the cycles will the gas pressure force on the piston be greatest? How does the temperature of the gas mixture in the cylinder change?

Four-stroke internal combustion engines operate according to the following scheme:
1) air intake (or a mixture of fuel and air),
2) compression and at the end of the stroke fuel intake or ignition,
3) fuel combustion (or fuel intake and combustion), gas expansion – (working stroke)
4) release of waste gases.
The highest pressure is reached in the third stroke, during which the compressed air-fuel mixture burns out and the piston stroke expands from top dead center to bottom.
The temperature at the beginning of the third cycle is maximum (close to 2000 ° C) and decreases at the end of the cycle (about 1000 ° C).