VARIABLE COMPRESSION ENGINE
The variable compression ratio of the VD/VC engine is accomplished by mounting the Swing Bar on Eccentric Bearings. When the eccentric bearings are rotated they effectively move the Swing Bar and Crankshaft closer to or further from the top of the piston chamber. It takes a lot of movement to change the volume in the combustion chamber. It only takes a slight movement to change the compression ratio.
The two Worm Screws to rotate the Eccentric Bearings will be driven by a common chain. This keeps them synchronized.
Variable volume and variable compression ratio can be done in the same engine as is shown. Likewise either of the features can be done independently.