If you’re riding a sports car, the name “LSD (Limited Slip Diff)” may have been heard once. This LSD is one of the most popular remodeling, especially when running on a circuit.
What kind of effect does this LSD have, and what kind of car can it be attached to?
LSD is a component that transmits the driving force on curves without waste
Cars usually have parts called “differential gears”. When running on a curve, the tires on the outside of the curve run more distance than the tires on the inside.
Therefore, when driving on a curve, the differential gear absorbs the difference in rotation between the outer tire and the inner tire, so that the outer tire on the curve rotates more and the inner side suppresses the rotation more. So you can go around the curve smoothly.
However, when running on a sharp curve at a faster speed, the inner tires may be lifted by centrifugal force. In this case, the load on the inner tires is lost, and the wheels run idle.
That’s where LSD comes in.
The LSD limits the slip of the differential gear, which allows power to be transmitted to the road surface efficiently even during sports running where the inner tires float.
What kind of car is LSD suitable for?
Basically, it is attached to a car that runs sports like running on a circuit.
Family cars and minivans are not premised on running in sports, so there are no optional settings, and there is often no LSD that can be applied to external products, so it can not be attached to any vehicle type.
The type of LSD？
There are various types of LSD. The typical ones are as follows.
- 1way, 2way, 1.5way
- Time difference sensitive type, torque sensitive type
In addition to these,
- Viscous type
- Helical type
- Torsen type
- Mechanical
- Electronic type
The electronic type controls the internal clutch mechanism etc. with a computer, so the timing when it starts to work and the strength etc. are adjusted in the optimal form. It is very high performance.
What are the disadvantages of LSD?
In general, adding an LSD controls the rotational difference, so there are problems. In particular, the extra torque is distributed to the inner side, so the tires look a bit slippery and the tires decrease faster.
In addition, because the difference in rotation is controlled, the ability to move the vehicle straight is stronger, and in some cases it may be difficult for an amateur to turn when driving.
In short, without LSD, the driving force will escape to some extent, so the speed will moderately decrease, but with LSD there is no escape, so oversteer or understeer There is
