Why is the car engine so loud?

[DiReid]

Reasons for excessive engine noise: 1. Excessive carbon deposits in the engine. 2. Inappropriate engine oil usage or dirty engine oil. Introduction to engines: 1. A car engine is the device that provides power to the vehicle, serving as the heart of the car, determining its power, fuel efficiency, stability, and environmental friendliness. 2. Depending on the power source, car engines can be categorized into diesel engines, gasoline engines, electric vehicle motors, and hybrids. The working principle of a car engine is: 1. Mixing air and gasoline in a certain proportion to form a combustible mixture. 2. The intake stroke draws the mixture into the cylinder, where it is compressed, ignited, and burned to produce thermal energy. 3. The high-temperature, high-pressure gas acts on the top of the piston, driving the piston to perform reciprocating linear motion, and mechanical energy is output externally through the connecting rod, crankshaft, and flywheel mechanism.