Patent ID: 7487747

Claim:
A mount apparatus for mounting a variable compression ratio internal combustion engine in which the compression ratio can be varied by moving a cylinder block and a crankcase relatively along the axial direction of a cylinder on a vehicle body member, wherein: said variable compression ratio internal combustion engine is mounted on said vehicle body member by at least two portions including a first mount portion provided on a transmission apparatus to which a crankshaft is linked and a second mount portion provided on the variable compression ratio internal combustion engine in a state in which said cylinder block is located above said crankcase; and said second mount portion is provided on said crankcase, wherein the variable compression ratio internal combustion engine is mounted on the vehicle body member such that the cylinder block moves relative to the vehicle body member a greater distance than the crankcase moves relative to the vehicle body member, when the compression ratio is varied, wherein a variable compression ratio mechanism comprises: a shaft portion; a cam portion having a circular cam profile fixedly mounted on the shaft portion eccentrically to the center axis of the shaft portion, the cam portion being accommodated in an accommodation bore provided in the cylinder block; and a movable bearing portion having a same outer profile as the cam portion rotatably mounted on the shaft portion in an eccentric way similar to the cam portion, the movable bearing portion being set in an accommodation bore provided in the crankcase, and wherein, by driving the cam portion and the movable bearing portion that are eccentrically provided, the cylinder block is moved along the axial direction of the cylinder relative to the crankcase to vary the compression ratio.