| 主权项 |
1. A crankshaft system for providing variable compression ratio in an internal combustion engine comprising a block and a cylinder head, the system comprising:
a crankshaft comprising:
a first, fixed output comprising a first end and a second end;a central portion, with a first end and a second end, comprising one or more crankpins and two or more main bearing journals;a second, fixed output comprising a first end and a second end;a first flex joint for flexible coupling the second end of the first output to the first end of the central portion; anda second flex joint for flexibly coupling the first end of the second output to the second end of the central portion; a plurality of main bearing caps, each main bearing cap with a first end and a second end, each of the first ends pivotally coupled to the block, for rotatably supporting the main bearing journals; a plurality of actuators, each disposed proximate the second ends of the plurality of main bearing caps, for moving the central portion of the crankshaft between a first, low compression ratio (LCR) position and a second, high compression ratio (HCR) position; wherein the first and second outputs are substantially coaxial with the two or more main bearing journals of the central portion in a middle compression ratio (MCR) position; and wherein the first and second outputs rotate about a fixed longitudinal axis. |
