Patent ID: 8671895

Claim:
A variable compression ratio apparatus with a reciprocating piston mechanism comprising: a piston slidingly installed in at least one cylinder; a connecting rod pivotally connected to a wrist pin of the piston; a main crankshaft having a central axis, a crank, and a crankpin on the crank; a lever assembly pivotally mounted on the crankpin of the crankshaft, the lever assembly having a first arm and a second arm; the first arm being pivotally connected to the connecting rod on a first end of the first arm and pivotally connected to the crankpin on a second end of the first arm; the second arm being pivotally connected to the crankpin on a first end of the second arm and having a roller rotationally installed on a second end of the second arm; the roller being slidingly installed within a pathway which has a predetermined confined path in which the roller may change position, wherein the roller functions as the fulcrum of the lever assembly; and the pathway being separate from the lever assembly and being able to change its position with respect to the crankshaft in response to changes in the engine load in order to change the compression ratio of the variable compression ratio apparatus.