PISTON AND CONNECTING ROD ASSEMBLY FOR VARIABLE COMPRESSION RATIO ENGINE, AND METHOD FOR DYNAMICALLY VARYING COMPRESSION RATIO

摘要

PROBLEM TO BE SOLVED: To provide a variable compression ratio engine capable of quickly adjusting its compression ratio, and preventing breakage or offset of effect due to excessive periodic load applied on a connecting rod during normal operation of the engine.;SOLUTION: A piston 26 and connecting rod 18 assembly for a variable compression ratio internal combustion engine 14 includes an eccentric bushing 28 containing an eccentric journal outer circumference part 48 held in a rod bore 24 of the connecting rod 18. The eccentric bushing 28 can be rotated between either of two rotary positions to effect a change in the height of the piston 26 relative to the connecting rod 18 and thus change the compression ratio. A latch 50 is operated by oil jets 90, 91 external to the connecting rod 18. The latch 50 includes bolts 54, 56 with tapered tips that seat in oblong holes 60, 62 in a flange plate 58.;COPYRIGHT: (C)2009,JPO&INPIT