What are the categories of naturally aspirated engines?

[McAlejandro]

Naturally aspirated engines are divided into four categories: diesel engines, gasoline engines, electric vehicle motors, and hybrid power systems. Intake System: Based on the working method of the intake system, they can be classified into four types: naturally aspirated, turbocharged, supercharged, and twin-charged. Piston Movement: According to the piston movement method, they can be divided into reciprocating piston internal combustion engines and rotary piston engines. Cylinder Arrangement: By cylinder arrangement, they include inline engines, V-type engines, W-type engines, and horizontally opposed engines. Number of Cylinders: Based on the number of cylinders, they can be categorized as single-cylinder and multi-cylinder engines. Modern vehicles commonly use three-cylinder, four-cylinder, six-cylinder, and eight-cylinder engines. Cooling Method: By cooling method, they can be classified as water-cooled engines and air-cooled engines. Water-cooled engines provide uniform cooling, reliable operation, and effective cooling performance, making them widely used in modern automotive engines. Stroke Count: By stroke count, they can be divided into four-stroke internal combustion engines and two-stroke internal combustion engines. Four-stroke internal combustion engines are widely used in automotive engines. Fuel Supply: By fuel supply method, they include carburetor engines, electronic fuel injection engines, and direct injection engines.