Patent ID: 7562642

Claim:
An adjustment device for a variable compression ratio engine, comprising: a control rack ( 7 ); a control device ( 12 ) providing adjustment of a vertical position of the control rack relative to an engine block ( 100 ); a rolling guide device ( 4 ); a sprocket ( 5 ); a transmission device ( 1 ) for at least one piston ( 2 ), said transmission device comprising a transmission member ( 3 ) interacting first with the rolling guide device ( 4 ), and secondly with the sprocket ( 5 ), said sprocket ( 5 ) interacting on an opposite side from the transmission member ( 3 ) with the control rack ( 7 ); and an adjustment device comprising i) at the rolling guide device ( 4 ), a position adjustment means for adjusting the positioning of the transmission device ( 1 ), and ii) at the control rack ( 7 ), a clearance adjustment means for adjusting the working clearances of the transmission device ( 1 ).