Non-helical torsen differential workings

[dfens]

I've been looking at cut-away drawings of a torsen differential which uses face cams on the half shafts driven by follower dogs in between - no clutches, worm gears, or locking dogs. It may be referred to as a SureTrac, Jack Knight, or Kazz type. How does it work? How does it compare functionally to the worm-gear type torsen? I have searched this forum and the rest of the web, I find a few pictures but no good explanations.

Thanks in advance for any help,

Paul

 

[mloew]

Torsen® is a trademark of Toyoda-Koki Automotive Torsen North America Inc. It is a particular type of mechanical limited slip-differnetial.

Best regards,

Matthew Ian Loew


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[NickE]

As mloew stated teh Torsen diff is a trademark. AFAIK all Torsen brand diffs use helical gears. This site gives a really good description.

http://auto.howstuffworks.com/differential.htm

I bet its either a Viscous unit, or a clutch type.

I do know that other differential manufacutrers are Quaife and the Kazz you mention is a brand. The SureTrac I thought was a Jeep/Crysler name.

 

[dfens]

Thanks for your response. My mistake for calling it a Torsen, the brand name for the worm-gear type TBD. It's some other kind of "torque sensing differential", as described by Honda wrt their ATV front diff. Here it is:

Any explanations and other info appreciated!

 

[GregLocock]

Ata rough guess the Belleville washer preloads the followers, and they graunch (technical term) up and down between the two wavy faces of the face cams if there is relative speed between the two half shafts, thereby transferring torque.



Cheers

Greg Locock

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[carnage1]

it looks like a modified detroit locker. if the force is from the ring gear it is locked but if the force is from the axel shafts it can rachet. The only problem with my expination is I have always been told that a full locker (like a detroit) in the front of a truck will break things. Maybe an ATV can get away with it?