Quote:
Originally Posted by CeeforCitroen
I'm wondering whether with cylinder deactivation, you could actually install some sort of clutch plate in the crank shaft so the rest of the cylinders didn't even move. Then with a controlled slip, the timing is lined up with a locking pin so all the cylinders have the correct timing. The problem is the engine is designed to run balanced as a unit, so there could be vibration issues when dividing up into individual V2 groups.
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If sections of the crank were isolated mechanically via clutches, there could be situations where only the rearmost section was actually able to transmit power.
Also, to engineer enough clearance inside the block, might make for an unacceptably long engine. Synchronization of the crank elements would be problematic, and the individual clutches would have to withstand different degrees of torque, requiring more mass as you near the flywheel.
The cost and complexity would be astronomical.