torsin is a trademark of the jtecht corporation the torsion differential has many patented components and is the most unique and ingenious method of providing differential action while overcoming the traction difference problem the internal components of a torso are quite different from that of a conventional differential at the heart of the system lies a specially shaped gear pair assembly let's see the cross-sectional shape of these gears at the mating point as can be seen one gear is a spur gear and the other one is a worm gear a torson works on the simple principle of worm
gear worm wheel that is a spinning worm gear can rotate the wheel but the rotating wheel cannot spin the worm gear throughout this discussion just keep this principle in mind a pair of such worm wheels are fitted with the case so the engine power received by the case is transferred to the worm wheels each end of the wheels is fitted with a spur gear now let's consider different driving scenarios when the vehicle moves straight the worm wheels will push and turn the worm gears so both the drive wheels will rotate at the same speed please
note here that in this condition the worm wheels do not spin on its own axis in this condition the whole mechanism moves as a single solid unit when the vehicle is negotiating a right turn the left wheel needs to rotate at a higher speed than the right wheel this speed differential is perfectly supported in the torsion the worm gear of the faster left axle will make the corresponding worm wheel spin on its own axis on the other side relative to the case the slow right axle is turning in the opposite direction thus the right worm
wheel will spin in the opposite direction the meshing spur gears at the ends of the worm wheel will make sure that the worm wheels are spinning at the same speed thus it guarantees a perfect differential action now let's try to understand how the torsion overcomes the drive wheel traction difference problem as you might be aware when your vehicle encounters a situation as shown the slippery wheel starts to spin very rapidly and will draw the majority of the engine's power as a result the vehicle will get stuck but if a torsion differential is used in this
case as soon as the slippery wheel starts to spin excessively the speed change will be transferred to the worm wheel the right worm wheel transfers the speed change to the left worm wheel since they are connected through spur gears here comes the tricky part the left side worm wheel will not be able to turn the corresponding worm gear because as we said a worm wheel cannot drive a worm gear as a result the whole mechanism gets locked and the left and right wheels turn together this allows a large amount of torque to be transferred to
the high traction wheel and the vehicle can thereby overcome the traction difference problem to carry the load two more worm wheel pairs are added if you are familiar with the other common technologies used to overcome the traction difference problem you might have noticed a great advantage of the torsion while the other technologies allow the drive wheel to slip for a limited amount of time before it gets locked in torsion the locking action is instantaneous that means as soon as the vehicle encounters a traction difference track the wheels will get locked to know more about the
clutch pack lsd technology please check the next video thank you
