Patent ID: 7174865

Claim:
An internal combustion engine having a variable compression ratio including a crankshaft, a driveshaft, a plurality of crankshaft-driveshaft arm assemblies, a transmission assembly, and a means to lift up and down said crankshaft, wherein said crankshaft being parallel to said driveshaft, said crankshaft-driveshaft arm assembly having an arm member, and first and second bearings, said first and second bearings of said crankshaft-driveshaft arm assembly affixed to said arm member, said first bearing rotatably receiving said crankshaft and said second bearing rotatably receiving said driveshaft, said transmission assembly having first and second gears wherein said first gear is affixed to said crankshaft, and said second gear affixed to said driveshaft, said means to lift up and down said crankshaft including a plurality of jackscrew assemblies, said jackscrew assembly including an arm holder, a spindle, and a frame, wherein said arm holder slidably receiving said arm member of said crankshaft-driveshaft arm assembly, said crankshaft-driveshaft arm assemblies being connected together by at least one metal beam, said crankshaft-driveshaft arm assembly having an articulated support means, said articulated support means having a cylindrical hole, said arm holder having front and rear walls, each having a cylindrical hole, said cylindrical hole of said articulated support means, and said cylindrical holes on said front and rear walls of said arm holder are longitudinally aligned, and a connecting shaft extends through said holes of said arm holder and said articulated support means.