The inline engine is generally abbreviated as L. For example, L4 stands for inline 4 cylinder.
The in-line layout is the most widely used form of cylinder arrangement today, especially on engines with a displacement of less than 2.5L. In this layout, all cylinders of the engine are arranged side by side at the same angle, and only one cylinder head is used. At the same time, the structure of the cylinder block and crankshaft is relatively simple, like the cylinders standing in a column.
Specifically, we generally have four types of L3, L4, L5, L6 (numbers represent the number of cylinders). The advantages of this layout engine are compact size, high stability, good low-speed torque characteristics and less fuel consumption, which of course also means lower manufacturing costs. At the same time, the engine with inline cylinder layout is also relatively compact and can adapt to a more flexible layout. It is also convenient for the arrangement of superchargers. But its main disadvantage is that the engine itself has low power and is not suitable for vehicles with more than 6 cylinders.