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。

公开(公告)号：US20130200816A1

公开(公告)日：2013-08-08

申请号：US13758428

申请日：2013-02-04

Applicant: DENSO CORPORATION

Inventor： Masamichi SHIBATA ,  Yuji KAJITA ,  Atsuya MIZUTANI ,  Koichi HATTORI ,  Yasuomi IMANAKA

IPC: H01T13/44

CPC classification number: H01T13/44 ,  F02P3/0407 ,  F02P3/0552 ,  F02P9/002

Abstract: An ignition system is provided, which can restrict decreasing of constant-voltage duration of a spark plug and effectively prevents the occurrence of an accidental fire in an engine. A typical ignition system includes a secondary coil having one end connected to a positive side of a battery via a low-voltage side path and the other end connected to a center electrode via a connecting path which connects the secondary coil and the spark plug. A constant-voltage path having a grounded end is connected to the connecting path. A block diode is arranged between the secondary coil and a point where the constant-voltage path is connected with the connecting path. A Zener diode is disposed within the constant-voltage path. Each anode of the block diode and the Zener diode is mutually connected.

Abstract translation: 提供一种点火系统，其可以限制火花塞的恒定电压持续时间的降低，并有效地防止发动机中发生意外的火灾。 典型的点火系统包括一个次级线圈，其一端通过低压侧路径连接到电池的正极侧，另一端经由连接次级线圈和火花塞的连接路径连接到中心电极。 具有接地端的恒定电压路径连接到连接路径。 在次级线圈和恒定电压路径与连接路径连接的点之间布置有块二极管。 齐纳二极管设置在恒压通路内。 块二极管和齐纳二极管的每个阳极相互连接。

公开(公告)号：US20130199510A1

公开(公告)日：2013-08-08

申请号：US13722453

申请日：2012-12-20

Applicant: DENSO CORPORATION

Inventor： Masamichi SHIBATA ,  Atsuya MIZUTANI ,  Koichi HATTORI ,  Yasuomi IMANAKA

IPC: F02P1/08

CPC classification number: F02P1/083 ,  F02P3/02 ,  F02P3/0407 ,  F02P3/0442 ,  F02P3/0552 ,  H01T13/44

Abstract: An ignition system is provided, in which a Zener diode is connected in parallel with a spark plug, to suppress torque variation from becoming large in an engine when deterioration of the spark plug is advanced. Specifically, the ignition system includes a secondary coil having an end connected to a center electrode of the spark plug via a connecting path. The connecting path is connected to a constant-voltage path having a grounded end and including the Zener diode. The time from when an ignition signal is switched off until when ignition timing occurs is measured for a plurality of times. The difference between a maximum value and a minimum value among the plurality of measurements is defined to be a variation range. A breakdown voltage of the Zener diode is adjusted based on requirements such as for rendering the variation range to be a predetermined time or smaller.

Abstract translation: 提供了一种点火系统，其中齐纳二极管与火花塞并联连接，以在火花塞的劣化提前时抑制发动机中的扭矩变化变大。 具体来说，该点火系统包括一个次级线圈，其一端通过连接路径连接到火花塞的中心电极。 连接路径连接到具有接地端并包括齐纳二极管的恒定电压路径。 从点火信号关闭直到点火正时发生的时间被测量多次。 多个测量中的最大值和最小值之间的差定义为变化范围。 齐纳二极管的击穿电压根据要求进行调整，例如使变化范围为预定时间或更短。

公开(公告)号：US20130199485A1

公开(公告)日：2013-08-08

申请号：US13757987

申请日：2013-02-04

Applicant: DENSO CORPORATION

Inventor： Masamichi SHIBATA ,  Atsuya MIZUTANI ,  Yasuomi IMANAKA ,  Koichi HATTORI

IPC: F02P17/12

CPC classification number: F02P17/12 ,  F02P3/0414 ,  F02P11/06

Abstract: A control apparatus for an ignition system of an internal combustion engine which can appropriately judge deterioration of a spark plug is disclosed. The ignition system includes a spark plug and a Zener diode. These are connected in parallel. In the ignition system, a constant-voltage path whose one of two ends is grounded is connected to the connecting path which connects the center electrode of the spark plug to a secondary coil. The constant-voltage path includes a Zener diode and a resistor. In a case where electric current is detected at the resister in a term from the start of current supply to a primary coil to the end, the control apparatus judges the spark plug being deteriorated.

Abstract translation: 公开了一种可以适当地判断火花塞的劣化的用于内燃机的点火系统的控制装置。 点火系统包括火花塞和齐纳二极管。 这些并行连接。 在点火系统中，两端接地的恒压路径连接到将火花塞的中心电极连接到次级线圈的连接路径上。 恒定电压路径包括齐纳二极管和电阻。 在从电流供应开始到初级线圈到末端的术语中，在电阻器处检测到电流的情况下，控制装置判断火花塞劣化。