INTERNAL COMBUSTION ENGINE COMPRISING VARIABLE COMPRESSION RATIO MECHANISM

摘要

This internal combustion engine comprising a variable compression ratio mechanism either measures an exhaust temperature or exhaust pressure which varies according to an actual expansion ratio, or measures a physical quantity which varies according to the exhaust temperature and/or the exhaust pressure (step 102), and estimates the current mechanical compression ratio on the basis of the measured value (steps 103 to 105).