What does L4 mean?
1 Answers
L4 has two meanings: L4 level autonomous driving, where the vehicle achieves full autonomous driving within specified speed limits without requiring driver intervention. L4 engine, where 'L' represents the cylinder arrangement, indicating an inline engine, and '4' denotes the number of cylinders. L4 level autonomous driving refers to highly autonomous driving, capable of operating without any driver input throughout the journey, but with certain limitations, such as a restricted maximum speed and relatively fixed driving areas. It typically relies on real-time updated road information data to support functions like automatic vehicle pickup and return, automatic convoy cruising, and obstacle avoidance in real-world scenarios. L2 level is partial autonomous driving, which can simultaneously perform acceleration, deceleration, and steering operations, meaning adaptive cruise control and lane-keeping systems can work together. Most automakers have already achieved L2 level autonomous driving technology. The L4 engine is a standard inline 4-cylinder engine. Most small-displacement cars use L4 engines, and such vehicles are quite common, including models like the Jetta, Santana, and Besturn. The differences between the L4 and H4 engines are: Four-wheel drive speed differs: the L4 engine is low-speed four-wheel drive; the H4 is high-speed four-wheel drive. The cylinder arrangement differs: the L4 engine is an inline 4-cylinder engine; the H4 is an opposed engine. Four-wheel drive means the vehicle maintains a four-wheel drive mode throughout the journey, with engine torque distributed in a fixed ratio between the front and rear wheels, providing better off-road and handling performance at all times. An engine is a machine that converts other forms of energy into mechanical energy, including internal combustion engines, external combustion engines, jet engines, and electric motors.
