Limited Slip Differential Operation
When the loads of the left and right wheels become unbalanced due to changes in road surface conditions and sudden turning, the driving torque of side gears A and B will differ. As mentioned earlier, because side gears A and B are in contact via the respective long and short pinions, the gears influence each other, resulting in contact reaction force between the long pinion and side gear B, and the short pinion and side gear A. The separating force in the axial direction of the contact reaction force causes side gears A and B to be pushed and extended. From this force, side gears A and B are pushed against the thrust washer (case) and friction occurs. The separating force in the radial direction of the contact reaction force causes the long pinion and short pinion to be pushed against the differential case (cases A and B). This force generates a large friction between the long pinion, short pinion, and differential case (cases A and B). Friction also occurs on the gear with the generation of contact reaction force of the four gears (pinions).
These frictional forces cause the generation of frictional torque at each section according to the size of the driving torque input to the differential case, and the generation of limited slip differential torque proportionate to the input torque.