公开(公告)号：WO2014186136A2

公开(公告)日：2014-11-20

申请号：PCT/US2014/036290

申请日：2014-05-01

Applicant: CATERPILLAR INC.

Inventor： KARCH, Aaron ,  PIERPONT, David A. ,  LANG, Daniel ,  SUBATCH JR., James A.

CPC classification number: F02B23/06 ,  F02B23/0621 ,  F02B23/0624 ,  F02B23/0669 ,  F02B23/0672 ,  F02B23/0693 ,  F02B2275/14 ,  F02D21/08 ,  F02M26/23 ,  Y02T10/123 ,  Y02T10/125

Abstract: A piston (718, 818, 918, 1018) for a compression ignition internal combustion engine (1010) includes a piston body (720, 820, 920, 1020) having a combustion face (728, 828, 928, 1028) defining a combustion bowl (730, 830, 930, 1030), and the combustion face (728, 828, 928, 1028) including a compound bowl surface and a compound rim surface. The combustion face (728, 828, 928, 1028) is profiled to balance a combustion efficiency property of the piston (718, 818, 918, 1018) with emissions properties of the piston (718, 818, 918, 1018). A ratio of a diameter of the combustion bowl (730, 830, 930, 1030) to a diameter of the cylinder bowl bore is from 0.68 to 0.74. Other dimensional and proportional features of the piston (718, 818, 918, 1018) support low smoke and NOx production during operation.

Abstract translation: 用于压缩点火内燃机（1010）的活塞（718,818,918,1018）包括具有限定燃烧的燃烧面（728,828,928,1028）的活塞体（720,820,920,1020） 碗（730,830,930,1030）和包括复合碗表面和复合轮缘表面的燃烧面（728,828,928,1028）。 燃烧面（728,828,928,1028）被成形以平衡活塞（718,818,918,1018）的燃烧效率性质与活塞（718,818,918,1018）的排放性质。 燃烧碗（730,830,930,1030）的直径与缸筒孔的直径的比率为0.68至0.74。 活塞（718,818,918,1018）的其他尺寸和比例特征支持在操作期间低烟和NOx产生。