公开(公告)号：US06945213B2

公开(公告)日：2005-09-20

申请号：US10227485

申请日：2002-08-26

申请人： Hiroyuki Kawakubo ,  Tetsuya Nakayasu ,  Tadashi Kato ,  Nobuyuki Oya ,  Tatsuya Hirata

发明人： Hiroyuki Kawakubo ,  Tetsuya Nakayasu ,  Tadashi Kato ,  Nobuyuki Oya ,  Tatsuya Hirata

IPC分类号： F02B75/18 ,  F02F1/00 ,  F02F7/00

CPC分类号： F02F1/004 ,  F02B2075/1816 ,  F02F7/0007

摘要： A cylinder block of a multicylinder engine, having a cylinder main body in which multiple cylinder bores are provided in parallel in an axial direction of a crankshaft, and a crankcase having plural journal walls. The crankcase is integrally provided with the cylinder main body, in which a communication hole extending in parallel to the axial line of the crankshaft is provided in the cylinder main body and the crankcase while at least a part of which is opened in the inner peripheral surface of the cylinder bore. This permits the cylinder block to be downsized, increases freedom of positional setting of the communication hole, and reduces ventilation resistance of air flow through the communication hole. A cut-processed member is expanded further outward from a piston slide surface and is formed along a radial direction of cylinder bores, in inner surfaces of the cylinder bores in at least portions closer to a piston at an open edge of a communication hole.

摘要翻译： 一种多缸发动机的气缸体，具有缸体主体，多个气缸孔沿曲轴的轴向平行设置，并具有多个轴颈壁。 曲轴箱与气缸主体一体地设置，其中在气缸主体和曲轴箱中设置有平行于曲轴的轴线延伸的连通孔，其中至少一部分在内周面 的气缸孔。 这允许气缸体小型化，增加连通孔的位置设置的自由度，并且降低通过连通孔的气流的通风阻力。 切割加工构件从活塞滑动表面进一步向外扩展，并且在气缸孔的内表面中沿着缸孔的径向方向形成在连通孔的开口边缘处更靠近活塞的至少部分。