An automobile engine is mainly composed of two mechanisms and five systems. The crankshaft connecting rod mechanism converts the thermal energy generated by combustion into the rotational power of the crankshaft through the piston and connecting rod, and the valve mechanism controls the opening and closing of the intake and exhaust valves to optimize combustion efficiency. The fuel supply system ensures the proper mixing ratio of fuel and air, the lubrication system reduces friction and cools components through the oil pump and filter, the cooling system maintains the engine operating temperature with the help of the water pump and radiator, the ignition system ignites the mixture through the spark plug in petrol engines, and the starting system provides initial power using the battery and starter. During daily maintenance, the status of each system should be checked regularly, such as oil replacement, coolant replenishment, and spark plug cleaning, to extend the engine's service life and maintain its performance.
