What is the purpose of an engine cover?

[SanMax]

Engine cover functions: It serves as a spoiler, beautifies the engine compartment to some extent, and also isolates noise generated by the engine during operation, thereby improving driving comfort. When engine covers were first invented, their primary purpose was to maintain engine compartment tidiness, but in reality, they offer many additional benefits. During operation, engines produce noise, and the engine cover helps reduce this noise while keeping the engine compartment clean. Nowadays, many domestic vehicles are equipped with engine covers in their compartments, whereas they are less commonly seen in some joint-venture or imported cars.