There are 3, 4, 5, 6, 8, 10, 12 cylinders commonly used in automobile engines. Engines with a displacement of less than 1L usually use 3 cylinders; (1-2.5)L is generally a 4-cylinder engine; about 3L is generally a 6-cylinder engine; about 4L is an 8-cylinder engine; and above 5.5L, a 12-cylinder engine is used. Generally speaking, under the same cylinder diameter, the greater the number of cylinders, the greater the displacement, and the higher the power; under the same displacement, the more cylinders, the smaller the cylinder diameter, and the higher the speed, so as to obtain greater boost power. . The arrangement of cylinders mainly includes in-line, V-shaped, W-shaped, etc.
Generally, the cylinders of engines with less than 5 cylinders are arranged in an in-line arrangement. A few 6-cylinder engines also have an in-line arrangement, and there have been in-line 8-cylinder engines in the past. The cylinder block of the in-line engine is lined up. The structure of the cylinder block, cylinder head and crankshaft is simple, the manufacturing cost is low, the low-speed torque characteristic is good, the fuel consumption is low, the application is relatively wide, and the disadvantage is low power. Generally, gasoline engines below 1L use 3-cylinder inline, (1-2.5)L gasoline engines mostly use inline 4-cylinder, and some four-wheel drive cars use inline 6-cylinder, because of its small width, superchargers and other facilities can be arranged nearby. The inline 6-cylinder has good dynamic balance and relatively low vibration, so it is also used by some medium and high-end cars. (6-12) Cylinder engines generally adopt a V-shaped arrangement, and VIO engines are mainly installed on racing cars. The length and height of the V-shaped engine are small, and it is very convenient to arrange. It is generally believed that the V-shaped engine is a relatively advanced engine and has become one of the symbols of the car level. The V8 engine has a very complex structure and high manufacturing cost, so it is used less. V12, the engine is too big and heavy, only very few high-end cars use it. At present, the most common engines are mainly inline 4-cylinder (14) and V-type 6-cylinder (V6) engines. Generally speaking, the displacement of the V6 engine is higher than that of the 14-, and the V6 engine runs smoothly and quietly than the 14-. U is mainly installed on ordinary-class cars, while V6 machines are installed on mid-to-high-end cars.