Device for changing geometric compression ratio of internal combustion engine has rotation device with section in form of ramp connected by form or mechanical locking to bearing ring on crankpin to change its position

摘要

The device is for changing the geometric compression ratio of an engine with a connecting rod (7) mounted on a crankpin (10) by an eccentric bearing ring (9) which is rotatable between a first minimum compression ratio position and a second maximum compression ratio position. A rotation device (35) has a section connected by form or mechanical locking to the bearing ring and is in the form of a ramp (25). The section of the rotation device is connected to an edge flange (13) on the bearing ring and preferably acts upon the circumferential face of the flange.