直接逆轉式柴油機(英語:Direct Reversing Diesel Engine)是一種曲軸可以轉向的柴油機。一般常見於大型低轉速的船用引擎,低速特性可讓螺旋槳有更高的推進效率,無需經過減速齒輪裝置而直接驅動之。當進車轉換至倒車時,以油壓或壓縮空氣來控制曲軸反轉。其進倒車裝置,有「移動凸輪軸式(sliding camshaft)」及「凸輪轉子移動式(moving cam follower)」等兩方式。

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