Classification of automotive engines:

1. According to different sources of power, automotive engines can be divided into diesel engines, gasoline engines, electric vehicle motors, and hybrid engines.

2. According to the working mode of the intake system, it can be divided into four types: naturally aspirated, turbocharged, mechanically supercharged, and dual turbocharged.

3. According to the piston movement mode, it can be divided into two types: reciprocating piston internal combustion engines and rotary piston engines.

4. According to the arrangement of cylinders, it is divided into four types: inline engine, V-type engine, W-type engine, and horizontally opposed engine.

5. According to the number of cylinders, it can be divided into single cylinder engines and multi cylinder engines. Modern cars often use three cylinder, four cylinder, six cylinder, and eight cylinder engines.

6. According to different cooling methods, it can be divided into water-cooled engines and air-cooled engines. Water cooled engines have uniform cooling, reliable operation, and good cooling effect, and are widely used in modern automotive engines.

7. According to the number of strokes, it 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.

8. According to the fuel supply method, it is divided into carburetor engines, electronic injection engines, and in cylinder direct injection engines.