Patent ID: 10215091

Abstract:
A variable compression ratio engine (1) is provided with a multi-link mechanism (101) between a piston (102) and a crankshaft (103). The multi-link mechanism (101) includes an upper link (104), a lower link (105) and a control link (106). An anti-vibration device (6) for vehicles is attached between the upper part of the engine (1) and a vehicle body to which the engine (1) is mounted. The anti-vibration device (6) includes a rod body (63) having a first elastic connecting part (61) at one end and a second elastic connecting part (62) at another end. The first elastic connecting part (61) is connected to the engine (1). The second elastic connecting part (62) is connected to the vehicle body. The anti-vibration device (6) further includes an inertial mass (641) supported by the rod body (63), an actuator (64) configured to reciprocate the inertial mass (641) in an axial direction (C) of the rod body (63), and a control unit (65) configured to control the actuator (64) so that the inertial mass (641) receives force in accordance with a displacement speed of the rod body (63) in the axial direction (C). The rod body (63) has a rigid body resonance frequency lower than a resonant frequency of bending and torsion of the engine (1).