Posted by Willy-N on Monday, June 21, 2004 at 11:21AM :
In Reply to: What's the shortest intermediate driveshaft you can build? posted by Don in Missouri on Monday, June 21, 2004 at 1:36AM :
Read this about them. Mark H.
Driveline systems containing Cardan joints are prone to several types of instability. When the shafts in the system are not collinear, the Cardan joint transmits non-constant angular velocity, as well as moments, which are periodic functions of time. The moments react at the bearing as periodic forcing functions. The output reactions are known to fluctuate with the driving angle. These can lead to system instabilities. The exact nature of the output reactions are dependent on relationships between the joint angle in conjunction with the types of joints used.
Another issue involves “torque wind up” during driveline launch. Specifically, as torque is applied to a driveline, resistance provided by the rear suspension, axle, and drive friction causes the joint angles to change from their design values. Thus wind-up must be accounted for during the design process.
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