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公开(公告)号：US06655367B2
公开(公告)日：2003-12-02
申请号：US10179384
申请日：2002-06-26
IPC分类号： F02P7077
CPC分类号： F02P13/00 , F02D2041/285 , F02D2400/18 , F02P3/02 , F02P17/12
摘要： An ignition coil unit to be installed in a hole opened through a cylinder head of an engine having a case, an ignition coil installed in the case and comprising a primary coil connected to a power source and a secondary coil connected to a spark plug which is installed in a combustion chamber of a cylinder of the engine for producing spark discharge to ignite air-fuel mixture to generate combustion thereof in the combustion chamber, and a circuit board on which an ionic-current detection circuit, connected to the secondary coil, which detects ionic-current that flows during the combustion of the air-fuel mixture; and a processing circuit, connected to the ionic-current detection circuit, which generates an output indicative of the detected ionic-current, are formed; In the unit, an igniter is also installed in the case, thereby improving detection accuracy of ionic-current and misfiring.
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公开(公告)号：US06858974B2
公开(公告)日：2005-02-22
申请号：US10272996
申请日：2002-10-18
申请人： Gakuji Moriya , Kenichi Ishida , Kazuyuki Kubo , Toshihiro Ohkama
发明人： Gakuji Moriya , Kenichi Ishida , Kazuyuki Kubo , Toshihiro Ohkama
摘要： A spark plug for internal combustion engine, which produces a spark discharge that ignites air-fuel mixture in the combustion chamber and causes combustion such that an ionic current flow during combustion can be utilized for detecting misfire of the engine. The spark plug the core connected to an ignition coil, a center electrode made of at least one of iridium and an iridium alloy and connected to the core through a seat, and a ground electrode separated from the center electrode with a gap. A sum of surface areas of the seat and the center electrode is not less than a prescribed value, specifically, is not less than 11.0 mm2, and more specifically, is not less than 11.47 mm2. Even when the diameter of the center electrode is reduced in the interest of improving ignition performance, improved ignition performance and improved ionic current detection accuracy can be achieved simultaneously.
摘要翻译： 一种用于内燃机的火花塞，其产生点燃燃烧室中的空气 - 燃料混合物并引起燃烧的火花放电，使得燃烧期间的离子电流流动可用于检测发动机的失火。 火花塞芯与点火线圈连接，中心电极由铱合金和铱合金中的至少一种制成，并通过座与芯体连接，接地电极与中心电极间隔开。 座椅和中心电极的表面积之和不小于规定值，特别是不小于11.0mm 2，更具体地，不小于11.47mm 2。 即使为了提高点火性能而减小中心电极的直径，也可以同时实现提高点火性能和提高的离子电流检测精度。
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公开(公告)号：US06691555B2
公开(公告)日：2004-02-17
申请号：US10180094
申请日：2002-06-27
申请人： Toshihiro Ohkama , Gakuji Moriya , Kenichi Ishida
发明人： Toshihiro Ohkama , Gakuji Moriya , Kenichi Ishida
IPC分类号： G01M1500
CPC分类号： F02P17/00 , F02P2017/125
摘要： A firing or ignition state discrimination system for an internal combustion engines having a spark plug which produces spark discharge when supplied with discharge current from an ignition coil to ignite air-fuel mixture in the combustion chamber. In the system, ionic-current that flows during combustion of the air-fuel mixture is detected at a predetermined first timing and leakage current that flows across electrodes of the spark plug is detected at a predetermined second timing which is later than the predetermined first timing. The firing or ignition state of the engine is discriminated to one from among normal, misfiring, spark plug fouling, and failure in ignition system or in fuel supply system based on the detected ionic-current and leakage current and presence or absence of fuel cutoff to the engine. With this, it becomes possible to accurately discriminates the firing or ignition state of the spark plug and to inform the fact to the vehicle operator if desired.
摘要翻译： 一种用于具有火花塞的内燃机的点火或点火状态鉴别系统，当从点火线圈供应放电电流以点燃燃烧室中的空气燃料混合物时，产生火花放电。 在系统中，在预定的第一定时检测在空燃混合物的燃烧期间流动的离子电流，并且在比预定的第一定时稍晚的预定的第二定时检测流过火花塞的电极的泄漏电流 。 基于检测到的离子电流和泄漏电流以及是否存在燃料切断至燃料供应系统，将发动机的点火或点火状态区分为普通的，失火的，火花塞结垢，点火系统故障或燃料供应系统中的一种 引擎。 由此，可以准确地识别火花塞的点火或点火状态，并且如果需要，则向车辆操作者通知事实。
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