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Originally Posted by SPIKE ARRESTOR Thought of attaching a pic for clearer understanding. Attachment 440341
It needs to be mentioned that the major drawback of a UJ when compared to a CV joint is the "range of operation". The angle between two intersecting shafts in an Independent suspension may sometimes range up-to 40 degrees, for smaller degrees even a UJ will suffice, but when it comes to 40 degrees the anomalies multiply.
(novice) Spike ![Big Grin](https://www.team-bhp.com/forum/images/smilies/biggrin.png) |
Thanks. If the diagram had been rotated slightly so that the input and output shafts were horizontal, I think people would more easily equate it to the gearbox, and differential, and the connecting shaft to the propeller shaft.
The diagram also answers the age old question of every schoolboy:- why dont the manufacturers tilt the differential so that the tail is inline with the prop shaft?
Thanks for highlighting the UJs limited range of operations. I did mention in an offhand way
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Originally Posted by Sutripta Another thing I forgot to mention was that in a front engine rear drive config, the deflection angles are small. |
An important point to note is that we can keep on shortening the intermediate shaft without any change in the equations governing its motion. In the extreme case we get two back to back joints with no intermediate shaft:- the double cardan joint. Which brings us to
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Originally Posted by ex670c Could be the Traction Avant was using a Double Cardan "CV" Joint. |
I think you are right. From very vague recollection, there was a UJ at the diff end, and a double cardan at the wheel end. I also think there was a separate slip joint.
Some pages can be seen at
Universal joints and driveshafts: analysis, design, applications By Hans Christoph Seherr-Thoss (Graf von), Friedrich Schmelz, Erich Aucktor
Even amongst the fan sites, they talk of notchy (and heavy) steering, 'snatchiness' in the transmission, and very large turning radius. These are related. So all was not rosy in the land of universally jointed Citroen.
@SS. I think a section on different hubs should also be included.
Re: the discussion on the Grand Vitara getting stuck, I think its way too early to discuss it. However, it does clear up
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Originally Posted by Sutripta An interesting discussion would be on why a Torsen needs a lock. |
Regards
Sutripta