公开(公告)号：US20160201551A1

公开(公告)日：2016-07-14

申请号：US14980243

申请日：2015-12-28

Applicant: Mazda Motor Corporation

Inventor： Kenji Uchida ,  Tatsuya Fujikawa ,  Masahisa Yamakawa ,  Daisuke Asaji ,  Kazuhiro Nagatsu ,  Takashi Kaminaga ,  Toru Miyamoto ,  Takashi Youso ,  Hiroaki Abe

IPC: F02B23/10 ,  F02F1/42 ,  F02F3/28

CPC classification number: F02B23/101 ,  F02B2023/085 ,  F02B2023/102 ,  F02B2275/40 ,  F02F1/4214 ,  F02F3/28 ,  Y02T10/125

Abstract: A combustion chamber structure for an engine is provided. The structure includes a piston formed with a downward dented cavity in a central part of an upper surface thereof, and a cylinder head forming a combustion chamber having a pent-roof shape. The upper surface of the piston has an annular part extending from an outer edge of the cavity to an outer edge of the upper surface, and surrounding the outer edge of the cavity. The annular part is formed with first and second piston upper surface portions. When the piston is at a top dead center, a ratio of a volume of a space formed between the first piston upper surface portion and a bottom surface of the cylinder head with respect to a volume of a space formed between the second piston upper surface portion and the bottom surface becomes below a predetermined value.

Abstract translation: 提供了一种用于发动机的燃烧室结构。 该结构包括在其上表面的中心部分形成有向下凹陷腔的活塞和形成具有顶顶形状的燃烧室的气缸盖。 活塞的上表面具有从空腔的外边缘延伸到上表面的外边缘并围绕空腔的外边缘的环形部分。 环形部分形成有第一和第二活塞上表面部分。 当活塞处于上止点时，形成在第一活塞上表面部分和气缸盖底面之间的空间的体积相对于形成在第二活塞上表面部分 并且底面变得低于预定值。

公开(公告)号：US10012134B2

公开(公告)日：2018-07-03

申请号：US15361511

申请日：2016-11-28

Applicant: MAZDA MOTOR CORPORATION

Inventor： Mitsunori Wasada ,  Tsuyoshi Yamamoto ,  Yasushi Nakahara ,  Takashi Youso ,  Hiroaki Abe ,  Takaaki Nagano ,  Atsushi Inoue ,  Kazuhiro Nagatsu ,  Takashi Kaminaga ,  Tatsuya Fujikawa

IPC: F02B23/10 ,  H01T13/20 ,  F02F1/24 ,  F02P15/02 ,  F02F3/28 ,  F02B23/08

CPC classification number: F02B23/101 ,  F02B2023/085 ,  F02D41/30 ,  F02D2041/389 ,  F02F1/242 ,  F02F3/26 ,  F02F3/285 ,  F02P13/00 ,  F02P15/02 ,  H01T13/20 ,  Y02T10/125

Abstract: Injection of the fuel by the injector 43 creates a gas flow in the combustion chamber. The gas expands in a radial fashion from an axis of a cylinder toward a radial outside of the cylinder, and then flows from the radial outside along the cylinder head bottom face 221 toward the axis of the cylinder. The spark plug 41 has a gap positioned away from the axis of the cylinder toward the radial outside of the cylinder at a predetermined distance, and placed radially inwardly from a position opposite a rim of an opening of the cavity 242. A side electrode extends to be oriented in a direction perpendicular to the flow of the gas along the cylinder head bottom face. The gap has a center positioned near the cylinder head bottom face, and closer to an interior of a combustion chamber than to the cylinder head bottom face.