公开(公告)号：US20150318671A1

公开(公告)日：2015-11-05

申请号：US14651040

申请日：2013-12-10

Applicant: DENSO CORPORATION

Inventor： Takanobu AOCHI ,  Takayuki INOHARA ,  Shinichi OKABE ,  Masamichi SHIBATA ,  Kaori DOI

IPC: H01T13/32

CPC classification number: H01T13/32 ,  H01T1/20 ,  H01T13/02 ,  H01T13/20

Abstract: A spark plug for an internal combustion engine has a housing, an insulator, a center electrode, a ground electrode, and a tip projecting portion. The tip projecting portion has an air guiding surface. In the spark plug, when viewed from a plug axial direction, a straight line that connects the center, in the plug circumferential direction, of the erect portion of the ground electrode and a center point of the center electrode is a straight line. An extension line of the air guiding surface is a straight line. A distance between an intersection, between the straight line and the straight line, and the center point of the center electrode is a (positive towards the side moving away from the erect portion. An angle formed by the straight line and the straight line is b. A diameter of the housing is D. At this time, all of b≧−67.8×(a/D)+27.4, b≦123.7×(a/D)+64.5, −0.4≦(a/D)≦0.4, and 0°

Abstract translation: 用于内燃机的火花塞具有壳体，绝缘体，中心电极，接地电极和尖端突出部分。 尖端突出部具有空气引导面。 在火花塞中，当从插头轴向观察时，将接地电极的直立部分的中心与插塞圆周方向连接的直线与中心电极的中心点成直线。 导气面的延长线是直线。 在直线与直线之间的交点之间的距离和中心电极的中心点之间的距离为（朝着直立部分移动的一侧为正），由直线和直线形成的角度为b 此时，b≥-67.8×（a / D）+27.4，b＆nlE; 123.7×（a / D）+64.5，-0.4＆nlE;（a / D）＆nlE ; 0.4和0°

公开(公告)号：US20140123967A1

公开(公告)日：2014-05-08

申请号：US14070630

申请日：2013-11-04

Applicant: DENSO CORPORATION

Inventor： Masamichi SHIBATA ,  Koichi HATTORI ,  Atsuya MIZUTANI

IPC: F02P9/00

CPC classification number: F02P9/002 ,  F02P3/0442 ,  F02P9/007 ,  F02P15/005

Abstract: An ignition device includes a spark plug and an ignition coil. The spark plug is attached to a cylinder head such that a center electrode and a ground electrode project into a combustion chamber. In an internal combustion engine, airflow is generated in a predetermined direction to the spark plug during a compression step. The ignition coil has a primary coil and a secondary coil. An output voltage of the secondary coil after interruption of energization of the primary coil is restricted to a predetermined voltage or less. The ground electrode has a leg portion extending from a housing of the spark plug and an opposing portion that extends in a direction intersecting with the leg portion and forms a gap by opposing the center electrode. The leg portion is attached to a position further upstream than the gap in a flow direction of the airflow during the compression step.

Abstract translation: 点火装置包括火花塞和点火线圈。 火花塞附接到气缸盖，使得中心电极和接地电极突出到燃烧室中。 在内燃机中，在压缩步骤期间，向火花塞预定的方向产生气流。 点火线圈具有初级线圈和次级线圈。 在初级线圈通电中断之后的次级线圈的输出电压被限制在预定电压以下。 接地电极具有从火花塞的壳体延伸的腿部和与腿部相交的方向延伸的相对部，并且通过与中心电极相对而形成间隙。 在压缩步骤期间，腿部在气流的流动方向上连接到比间隙更上游的位置。