What do you mean LSD is in the car?
Limited slip differential, as its name implies, is an improved differential that limits wheel slip, and refers to a differential that allows the speed difference between the driving wheels on both sides within a certain range to ensure normal cornering and other driving performance. In fact, LSD can be divided into several types according to different structures, and each LSD has its own special features.
The differential well solves the requirement that the left and right driving wheels rotate at different speeds when the car is on uneven roads and turning. However, due to the existence of the differential, when one side of the driving wheel slips, the power cannot be effectively transmitted, that is, the slipping wheel cannot generate the driving force, and the non-slipping wheel cannot get enough torque.
The differential lock solves the problem of power transmission when one wheel of an automobile slips, that is, locking the differential to make it stop working, and the left and right driving wheels can get the same torque. However, nature always gives mankind endless problems. The differential lock solves the original problems, but it also brings new problems.
Extended data
The difference between differential and differential lock:
The car will be equipped with a differential. Generally, two-wheel drive vehicles will be equipped with one on the drive shaft, and four-wheel drive vehicles will be equipped with two or three. The principle of differential is very simple. The power of the engine is output to the wheels on both sides through two half shafts. When the car goes straight, the wheels on the left and right sides will keep the same speed.
If the inner wheel must be slower than the outer wheel when the vehicle turns, the differential can make the speed difference between the two wheels. Simply put, the differential can ensure that both wheels have power output and the vehicle can turn smoothly.
If one wheel of a vehicle is on a road with low adhesion, such as snow, ice or mud, and the other wheel is on a normal road, you will find that on the road with low adhesion, the wheels will idle when starting, and the vehicle will not run normally, even if you step on the accelerator.
This situation is what we usually call a truck. If we can lock the differential, we can get out of trouble smoothly, so the differential lock was born.
Baidu encyclopedia-limited slip differential