公开(公告)号：US5720253A

公开(公告)日：1998-02-24

申请号：US716850

申请日：1996-09-10

申请人： Tadashi Matoba ,  Teruyuki Itoh ,  Akihiro Iiyama ,  Akihiko Kakuhou

发明人： Tadashi Matoba ,  Teruyuki Itoh ,  Akihiro Iiyama ,  Akihiko Kakuhou

IPC分类号： F02B23/10 ,  F02B75/12 ,  F02F1/24 ,  F02F3/26

CPC分类号： F02B23/104 ,  F02F3/26 ,  F02B2023/106 ,  F02B2023/107 ,  F02B2075/125 ,  F02F2001/241 ,  F02F2001/245 ,  Y02T10/123 ,  Y02T10/125

摘要： A direct-injection type spark-ignition internal combustion engine comprises a fuel-injection valve whose spray hole is inclined toward a piston crown, while an uppermost line of fuel spray injected through the spray hole is set at a lower level than electrodes of the spark plug and a lowermost line of the fuel spray is in spaced relationship with a cylinder inner wall close to the spray hole. The piston crown is formed with a recessed portion and a raised flat-surface portion to define a ridge line as an intersecting line between them. The ridge line is offset from a center axis of the cylinder by a predetermined distance toward the exhaust-valve port side. Preferably, a spray angle between the uppermost and lowermost lines is set within a predetermined angle range of 70.degree..+-.20.degree..

摘要翻译： 直喷式火花点火内燃机包括喷射孔，其喷射孔朝向活塞顶部倾斜，而通过喷射孔喷射的最上面的燃料喷射线被设定在比火花的电极低的水平 插头和燃料喷雾的最下面的线与靠近喷射孔的气缸内壁间隔开。 活塞顶部形成有凹部和凸起的平坦表面部分，以将脊线限定为它们之间的相交线。 脊线从气缸的中心轴线向排气阀端口侧偏移预定的距离。 优选地，最上面和最下面的线之间的喷射角度设定在70°±20°的预定角度范围内。