公开(公告)号：US09228531B2

公开(公告)日：2016-01-05

申请号：US13892396

申请日：2013-05-13

Applicant: Caterpillar Inc.

Inventor： Aaron Ness ,  Scott Coulier ,  Thomas Kammerdiener ,  Jonathan Kilkenny

IPC: F02F3/00 ,  F02F3/24 ,  F02F3/26 ,  F02F3/28 ,  F02F3/22

CPC classification number: F02F3/28 ,  F02B23/0624 ,  F02B23/0645 ,  F02B23/0651 ,  F02B23/0672 ,  F02F3/00 ,  F02F3/22 ,  F05C2201/021 ,  Y02T10/125

Abstract: A piston for balancing combustion efficiency and smoke generation with NOx production includes a combustion face forming a combustion bowl having a compound curvature increased in sharpness in a radially outward direction. An outer bowl surface defines a large radius of curvature adjacent an inner bowl surface, and a medium radius of curvature adjacent a cylindrical wall surface. The inner bowl, outer bowl, and wall surfaces together contour the combustion bowl, such that a diameter of the combustion bowl is about 124 mm so as to establish a bowl to bore ratio of about 0.71 in a direct injection compression ignition engine with a compression ratio of about 15:1 to 17:1.

Abstract translation: 用于利用NOx生成来平衡燃烧效率和烟雾产生的活塞包括形成具有在径向向外的方向上以锐度增加的复合曲率的燃烧碗的燃烧面。 外碗表面限定了与内碗碗表面相邻的大的曲率半径，以及邻近圆柱形壁表面的中等曲率半径。 内碗，外碗和壁表面一起轮廓燃烧碗，使得燃烧碗的直径为约124mm，以便在具有压缩的直喷式压燃式发动机中建立约0.71的碗孔比 比例为约15：1至17：1。

公开(公告)号：US20140331961A1

公开(公告)日：2014-11-13

申请号：US13892396

申请日：2013-05-13

Applicant: Caterpillar Inc.

Inventor： Aaron Ness ,  Scott Coulier ,  Thomas Kammerdiener ,  Jonathan Kilkenny

IPC: F02F3/28

CPC classification number: F02F3/28 ,  F02B23/0624 ,  F02B23/0645 ,  F02B23/0651 ,  F02B23/0672 ,  F02F3/00 ,  F02F3/22 ,  F05C2201/021 ,  Y02T10/125

Abstract: A piston for balancing combustion efficiency and smoke generation with NOx production includes a combustion face forming a combustion bowl having a compound curvature increased in sharpness in a radially outward direction. An outer bowl surface defines a large radius of curvature adjacent an inner bowl surface, and a medium radius of curvature adjacent a cylindrical wall surface. The inner bowl, outer bowl, and wall surfaces together contour the combustion bowl, such that a diameter of the combustion bowl is about 124 mm so as to establish a bowl to bore ratio of about 0.71 in a direct injection compression ignition engine with a compression ratio of about 15:1 to 17:1.

Abstract translation: 用于利用NOx生成来平衡燃烧效率和烟雾产生的活塞包括形成具有在径向向外的方向上以锐度增加的复合曲率的燃烧碗的燃烧面。 外碗表面限定了与内碗碗表面相邻的大的曲率半径，以及邻近圆柱形壁表面的中等曲率半径。 内碗，外碗和壁表面一起轮廓燃烧碗，使得燃烧碗的直径为约124mm，以便在具有压缩的直喷式压燃式发动机中建立约0.71的碗孔比 比例为约15：1至17：1。