VARIABLE COMPRESSION RATIO INTERNAL COMBUSTION ENGINE AND METHOD FOR DISCHARGING COOLANT FROM VARIABLE COMPRESSION RATIO INTERNAL COMBUSTION ENGINE

摘要

A cylinder block side drain (3f) is provided in a cylinder block (3) and a crankcase side drain (4h) is provided in a crankcase (4). A jacket cover (80) is provided in an water jacket (5) of the cylinder block (3). The jacket cover (80) is pressed against the wall of the water jacket (5) on the crankcase side. When discharging the coolant, the water jacket (5) is opened by pushing the jacket cover (80) inward using a coupler (6) and the coolant is discharged to the outer side of the crankcase (4) via the coupler (6).