SUPER-LSD OPERATION


BHE031427100T05

Straight ahead driving

• When driving straight, the right and left side gears rotate at the same speed, and the pinion and side gears rotate together with the differential gear case. Input force from the ring gear is transmitted to the pinion gears via the gear case and to the drive shaft via the side gears. Due to this, the difference between right and left in the differential does not occur.

1
Side gear
2
Drive shaft
3
Pinion gear
4
Rotation direction

Differential operation

• If the rotation speed between the right and left wheels becomes different (during normal driving), the pinion gears rotate together while revolving around the center axle of the drive shaft, thereby absorbing the difference in rotation speed. This mechanism serves as a differential.

1
Rotation of pinion gear
2
Fast
3
Slow
4
Rotation direction

Limited-slip operation

• If the differential encounters a condition requiring limited-slip control such as wheel spin, thrust force acts on the side gears due to the reaction force from the meshing of the pinion and side gears. This thrust force presses the side gears against the taper ring, generating friction between the side gear cone and the taper ring and reducing the torque of the slipping wheel. The reduced torque is transmitted without change to the wheel with higher traction, and the limited slip differential function is provided. The torque transmitted to the wheel with higher traction is proportionate to the input torque of the ring gear.

1
Taper ring
2
Side gear
3
Slow (high traction side)
4
Fast (spinning)
5
Thrust force
6
Force generating friction between side gear and taper ring
7
Torque flow
8
Rotation direction