A piston motor is a mechanical device represented by the symbols 🔧🔩⚙️🚗. It utilizes pistons, which are driven by combustion or other sources of energy, to convert linear motion into rotational motion. This mechanism is commonly used in automotive engines, where the controlled explosions of fuel-air mixture in the cylinders drive the pistons, resulting in the rotation of the crankshaft and powering the vehicle forward.