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    • 10. 发明授权
    • Multi-cylinder internal combustion engine
    • 多缸内燃机
    • US08522742B2
    • 2013-09-03
    • US12649924
    • 2009-12-30
    • Kenichi OhmoriAkifumi Nomura
    • Kenichi OhmoriAkifumi Nomura
    • F01M1/02F02B77/00
    • F02B61/02F01M11/02F02F7/0007
    • To reduce the height of a crankcase by arranging a communicating passage in a proper position and to miniaturize an engine in a multi-cylinder internal combustion engine provided with an upper crankcase integrated with a cylinder block or provided separately from the cylinder block on the downside of the cylinder block and a lower crankcase connected to a lower part of the upper crankcase and provided with a communicating passage that communicates with internal spaces of plural crank chambers corresponding to plural cylinders. In the multi-cylinder internal combustion engine, a communicating hole that communicates with the communicating passage is provided on at least either side of the upper crankcase or the lower crankcase, and a cover forming the communicating passage is arranged with the cover covering the communicating hole and is attached to both crankcases across a joined plane of the upper crankcase and the lower crankcase.
    • 为了通过将连通通道布置在适当的位置并且在设置有与气缸体一体的上部曲轴箱或与气缸体分开设置的多气缸内燃机中将发动机小型化以减小曲轴箱的高度,所述上部曲轴箱在气缸体的下侧 气缸体和下曲轴箱连接到上曲轴箱的下部,并具有与多个气缸对应的多个曲柄室的内部空间连通的连通通道。 在多气缸内燃机中,在上曲轴箱或下曲轴箱的至少任一侧设置有与连通通路连通的连通孔,并且形成连通通路的盖布置成覆盖着连通孔 并且通过上曲轴箱和下曲轴箱的接合平面连接到两个曲轴箱。