👉 The fluid drive system, often utilized in various mechanical applications, is a type of internal combustion engine that operates on the principle of converting chemical energy from fuel into mechanical energy through the movement of a fluid, typically oil. This fluid, known as lubricating oil, serves multiple critical functions: it reduces friction between moving parts, preventing wear and tear; it cools the engine by absorbing and dissipating heat; and it acts as a sealant, maintaining the integrity of the engine's components. By circulating through the engine, the oil not only facilitates these processes but also helps in the removal of contaminants and debris, ensuring the engine operates efficiently and reliably.