| 摘要 |
<p>Disclosed is a three-cylinder engine wherein a vibration alleviation unit for alleviating vibrations in a vehicle when an engine is mounted in the vehicle is disposed either upon the crankshaft or upon a component that operates in unison with the crankshaft. The three-cylinder engine is supported by the chassis by way of engine mounts that are positioned upon at least both ends of the engine in the direction of the crankshaft axis. Given that the spring constant of one of the engine mounts in the pitch direction of the crankshaft is designated KV, the spring constant of the engine mount in the yaw direction of the crankshaft is designated KH, the component of the primary couple of forces that occurs with the three-cylinder engine in the pitch direction is designated Mv, the component of the primary couple of forces that occurs with the three-cylinder engine in the yaw direction is designated MH, and that the sum of Mv and MH is designated Mv0, then the spring constants of the engine mounts are set such that Kv > KH, and the vibration alleviation unit is set so as to satisfy the condition 0 < Mv/Mv0 < 0.5.</p> |
