公开(公告)号：US6104195A

公开(公告)日：2000-08-15

申请号：US832201

申请日：1997-04-08

申请人： Tohru Yoshinaga ,  Tokio Kohama ,  Hiroshi Yorita ,  Yasuyuki Satou ,  Masao Kano ,  Toshiaki Yamaura

发明人： Tohru Yoshinaga ,  Tokio Kohama ,  Hiroshi Yorita ,  Yasuyuki Satou ,  Masao Kano ,  Toshiaki Yamaura

IPC分类号： F02P17/12 ,  G01N27/62 ,  G01N27/68

CPC分类号： G01N27/62 ,  G01N27/68

摘要： An apparatus for detecting a condition of burning in an internal combustion engine includes a pair of opposed electrodes provided in a combustion chamber of the engine, and an AC voltage applying device for applying an AC voltage between the opposed electrodes. A current detecting device is operative for detecting a current flowing between the opposed electrodes. A current generating means for generating a current-representing signal depending on the detected current, the current generating means having a differentiating circuit for differentiating the AC voltage into the capacitance-current representing signal. In another aspect of this invention, the apparatus further comprises calculating means for calculating ratios between a parameter represented by the burning-ion current representing signal and a parameter represented by a signal depending on the AC voltage applied between the opposed electrodes. A waveform processing device is operative for removing the capacitive current component from the current-representing signal to extract a burning ion current component, and for generating a burning-ion-current representing signal depending on the extracted burning ion current component. The capacitive current component occurs in correspondence with the AC voltage. One aspect of the invention utilizes calculating means for calculating a ratio between a parameter represented by the burning-ion-current representing signal and a parameter represented by a signal depending on the AC voltage applied between opposed electrodes. The burning ion current component corresponds to a burning ion current which flows between the opposed electrodes. A burning condition detecting device is operative for detecting a condition of burning in the combustion chamber of the engine on the basis of the burning-ion-current representing signal generated by the waveform processing device. The waveform processing device includes an integration processing device for integrating the current-representing signal to generate the burning-ion-current representing signal.

公开(公告)号：US5925819A

公开(公告)日：1999-07-20

申请号：US792169

申请日：1997-01-30

申请人： Tohru Yoshinaga ,  Tokio Kohama ,  Hiroshi Yorita ,  Yasuyuki Satou ,  Masao Kano

发明人： Tohru Yoshinaga ,  Tokio Kohama ,  Hiroshi Yorita ,  Yasuyuki Satou ,  Masao Kano

IPC分类号： F02D41/14 ,  F02P17/12 ,  G01M15/00

CPC分类号： F02P17/12 ,  F02P2017/125

摘要： A combustion monitoring apparatus for an internal combustion engine is provided which is designed to distinguish abnormal combustion conditions from a normal combustion conditions using a combustion ion current included in a current flowing through plug electrodes of a spark plug, resulting from motion of ions between the plug electrodes which are produced by combustion. For example, if a maximum value of the combustion ion current during one combustion cycle is smaller than a given value, it is determined that a misfire has occurred. If an attenuation time from generation of the current flowing through the plug electrodes until a variation in the current is decreased to a given value is shorter than a given time period, it is determined that a flame has been blown out before combustion is completed.

摘要翻译： 提供一种用于内燃机的燃烧监测装置，其被设计为使用包括在流过火花塞的插塞电极的电流中的燃烧离子电流来区分异常燃烧条件与正常燃烧条件，该电流是由插塞之间的离子运动引起的 通过燃烧产生的电极。 例如，如果在一个燃烧循环期间的燃烧离子电流的最大值小于给定值，则确定发生了失火。 如果从流过插塞电极的电流的产生的衰减时间直到电流的变化减小到给定值，则比给定的时间段短，则确定在燃烧完成之前已经将火焰吹出。

公开(公告)号：US6020742A

公开(公告)日：2000-02-01

申请号：US798149

申请日：1997-02-10

申请人： Masao Kano ,  Tokio Kohama ,  Tohru Yoshinaga ,  Hiroshi Yorita ,  Yasuyuki Satou

发明人： Masao Kano ,  Tokio Kohama ,  Tohru Yoshinaga ,  Hiroshi Yorita ,  Yasuyuki Satou

IPC分类号： G01M15/04 ,  F02P17/12 ,  G01L23/22 ,  G01M15/00

CPC分类号： F02P17/12 ,  F02D35/027 ,  G01L23/225 ,  F02P2017/125

摘要： A combustion monitoring apparatus for an internal combustion engine is provided which includes a voltage supply circuit, a combustion monitoring circuit, and a control circuit. The voltage supply circuit applies the voltage to plug electrodes of a spark plug mounted in a combustion chamber of the engine. The combustion ion monitoring circuit monitors a variation in amount of combustion ions existing between the plug electrodes to determine a combustion condition of the engine based on the current flowing through the plug electrodes produced by application of the voltage to the electrodes. The control circuit controls an operation of the voltage supply circuit so that the voltage is applied across the plug electrodes prior to a discharge duration of a spark plug mounted in the combustion chamber of the engine for monitoring preignition.

摘要翻译： 提供一种用于内燃机的燃烧监测装置，其包括电压供应电路，燃烧监测电路和控制电路。 电压供给电路对安装在发动机的燃烧室内的火花塞的插头电极施加电压。 燃烧离子监视电路监测存在于插头电极之间的燃烧离子量的变化，以基于流过通过向电极施加电压而产生的插塞电极的电流来确定发动机的燃烧状态。 控制电路控制电压供应电路的操作，使得在安装在发动机的燃烧室中的火花塞的放电持续时间之前，在插头电极之间施加电压，用于监视预启动。

公开(公告)号：US06265814B1

公开(公告)日：2001-07-24

申请号：US09143613

申请日：1998-08-28

申请人： Tohru Yoshinaga ,  Takehiko Kato ,  Tokio Kohama ,  Hiroshi Yorita ,  Masaki Takeyama ,  Masatoshi Ikeda

发明人： Tohru Yoshinaga ,  Takehiko Kato ,  Tokio Kohama ,  Hiroshi Yorita ,  Masaki Takeyama ,  Masatoshi Ikeda

IPC分类号： H01T1320

CPC分类号： H01T13/40

摘要： To excellently grow flame kernel while lowering breakdown voltage, a bypass electrode comprising a semiconductor material is installed in a path bypassing an inductive spark gap between a center electrode and a ground electrode, and the center electrode and the ground electrode are electrically connected by the bypass electrode and capacitive discharge is carried out by applying breakdown voltage between the center electrode and the ground electrode via the bypass electrode, and thereafter, inductive discharge is carried out through the inductive spark gap.

摘要翻译： 为了在降低击穿电压的同时优良地生长火焰核，包括半导体材料的旁路电极安装在绕过中心电极和接地电极之间的感应火花隙的路径中，并且中心电极和接地电极通过旁路电连接 电极和电容放电是通过旁路电极在中心电极和接地电极之间施加击穿电压进行的，之后通过感应火花隙进行感应放电。

公开(公告)号：US06653840B2

公开(公告)日：2003-11-25

申请号：US10115022

申请日：2002-04-04

申请人： Hiroshi Yorita ,  Masatoshi Ikeda ,  Makoto Toriyama ,  Tohru Yoshinaga

发明人： Hiroshi Yorita ,  Masatoshi Ikeda ,  Makoto Toriyama ,  Tohru Yoshinaga

IPC分类号： F02P1700

CPC分类号： F02P17/12 ,  F02P2017/125

摘要： In an engine ignition unit, a transistor and a current detecting resistor are connected to primary and secondary windings of an ignition coil, respectively. The current detecting resistor is used for detecting a current flowing between the opposing electrodes of spark plug. At an ignition by the spark plug, high-frequency square wave signals are generated by an oscillator after an ignition signal is cut off. The square wave signals turn on and off the transistor. By this operation, a battery voltage is intermittently applied to the primary winding and an ion current is measured. A frequency of the square wave signals is set close to a resonant frequency of an ion current path including the spark plug, the secondary winding of the ignition coil and the current detecting resistor.

公开(公告)号：US06397827B1

公开(公告)日：2002-06-04

申请号：US09630009

申请日：2000-07-31

申请人： Takehiko Kato ,  Tohru Yoshinaga ,  Hiroshi Yorita ,  Shinichi Okabe ,  Tatsushi Nakashima ,  Tetsuya Miwa

发明人： Takehiko Kato ,  Tohru Yoshinaga ,  Hiroshi Yorita ,  Shinichi Okabe ,  Tatsushi Nakashima ,  Tetsuya Miwa

IPC分类号： F02P1510

CPC分类号： F02P15/08 ,  F02D41/3023 ,  F02D2041/389 ,  F02P9/007

摘要： An ignition device sets a total discharge period, each discharge period and each intermittent period of a multiple discharge are set by a control map in addition to the setting of a throttle opening, fuel injection timing, fuel injection period and ignition timing for the range of non-stratified charge combustion, when a direct injection-type engine operates in the range of stratified charge combustion. Ignition signals including a plurality of rises and falls are outputted in time with a specific ignition timing after fuel injection. Thus a plurality of sparks are generated from the spark plug, ensuring reliable ignition in response to changes in the concentration of sprayed fuel within the operation range for stratified charge combustion.

摘要翻译： 点火装置设定总放电周期，除了设定节气门开度，燃料喷射正时，燃料喷射期间和点火正时之外，还通过控制图来设定每个放电周期和多次放电的每个间歇期间 当直喷式发动机在分层充气燃烧的范围内运行时，非分层充气燃烧。 在燃料喷射之后，具有特定点火正时的时间，输出包括多个上升和下降的点火信号。 因此，从火花塞产生多个火花，确保在分层充气燃烧的操作范围内响应于喷射燃料的浓度变化而可靠地着火。

公开(公告)号：US06734677B2

公开(公告)日：2004-05-11

申请号：US10269948

申请日：2002-10-15

申请人： Makoto Toriyama ,  Tohru Yoshinaga ,  Hiroshi Yorita

发明人： Makoto Toriyama ,  Tohru Yoshinaga ,  Hiroshi Yorita

IPC分类号： F02P1700

CPC分类号： G01N27/62 ,  F02P17/12

摘要： A combustion condition detecting device detects combustion ions between opposing electrodes in a combustion chamber by ion current flowing between the electrodes in response to a.c. current voltage applied between the electrodes. A low pass filter for eliminating current components having high order frequencies of the a.c. voltage is disposed in a primary side of the transformer so that a waveform of the a.c. voltage approximates a sine wave. Thus, detection accuracy of the combustion ions is prevented from being affected by variation of capacitive current included in the current flowing between the electrodes, wherein the variation of the capacitive current is caused by distortion of the waveform of the a.c. voltage.

摘要翻译： 燃烧条件检测装置通过响应于直流电流在电极之间流动的离子电流来检测燃烧室中的相对电极之间的燃烧离子。 施加在电极之间的电流电压。 一种低通滤波器，用于消除交流电源的高阶频率的电流分量。 电压设置在变压器的初级侧，使得交流电的波形。 电压近似正弦波。 因此，防止燃烧离子的检测精度受到在电极之间流动的电流中包括的电容电流的变化的影响，其中电容电流的变化是由a.c.的波形的失真引起的。 电压。

公开(公告)号：US20050029915A1

公开(公告)日：2005-02-10

申请号：US10910585

申请日：2004-08-04

申请人： Hiroshi Yorita ,  Shinichi Okabe ,  Hitoshi Morita ,  Tsunenobu Hori

发明人： Hiroshi Yorita ,  Shinichi Okabe ,  Hitoshi Morita ,  Tsunenobu Hori

IPC分类号： C22C5/04 ,  H01T13/20 ,  H01T13/39 ,  H01T13/46

CPC分类号： H01T13/39

摘要： A small-sized spark plug is provided which ensures the stability in the location of production of sparks between center and ground electrodes. The center and ground electrodes have joined thereon cylindrical members such as noble metal chips which are opposed to each other through a spark gap. The cylindrical members are so oriented to have longitudinal center lines extend parallel in misalignment with each other. This orientation results in shorter and longer intervals between end surfaces of the cylindrical members. The sparks are concentrated between portions of edges of cylindrical members located apart the shorter interval, thereby resulting in the stability in the location of production of the sparks.

摘要翻译： 提供了一种小型火花塞，确保了在中心和接地电极之间产生火花的位置的稳定性。 中心接地电极通过火花隙彼此相对的圆柱形构件，例如贵金属芯片。 圆柱形构件被定向成具有彼此不对准的纵向中心线平行延伸。 这种方向导致圆柱形构件的端面之间的更短和更长的间隔。 火花集中在位于较短间隔之间的圆筒形部件的边缘部分之间，从而导致火花产生位置的稳定性。

公开(公告)号：US06653767B2

公开(公告)日：2003-11-25

申请号：US09960514

申请日：2001-09-24

申请人： Hitoshi Morita ,  Shinichi Okabe ,  Takehiko Kato ,  Hiroshi Yorita ,  Keiji Kanao ,  Tetsuya Miwa

发明人： Hitoshi Morita ,  Shinichi Okabe ,  Takehiko Kato ,  Hiroshi Yorita ,  Keiji Kanao ,  Tetsuya Miwa

IPC分类号： H01T1320

CPC分类号： H01T13/39 ,  H01T13/20

摘要： At least one of a center electrode tip and a ground electrode tip is made of an iridium alloy. A discharge gap, formed between the center electrode tip and the ground electrode tip, is less than 1.1 mm. And, cross sections of the center electrode tip and the ground electrode tip are equal to or smaller than 0.95 mm2 in a spherical region where a distance from a midpoint of the discharge gap is within 0.6 mm.

摘要翻译： 中心电极尖端和接地电极尖端中的至少一个由铱合金制成。 形成在中心电极尖端和接地电极尖端之间的放电间隙小于1.1mm。 并且，在距离放电间隙的中点的距离在0.6mm以内的球面区域中，中心电极端部和接地电极端部的截面为0.95mm 2以下。

公开(公告)号：US20080314354A1

公开(公告)日：2008-12-25

申请号：US12143161

申请日：2008-06-20

申请人： Hiroshi Yorita ,  Masamichi Shibata

发明人： Hiroshi Yorita ,  Masamichi Shibata

IPC分类号： F02F1/24

CPC分类号： H01T13/08 ,  H01T13/20

摘要： A spark plug and cylinder head assembly includes a spark plug and a cylinder head of an engine. The cylinder head has a bore and a surface which faces a combustion chamber of the engine and on which the bore opens. The spark plug is fit in the bore of the cylinder head, and includes a metal shell, an insulator retained in the metal shell, a center electrode secured in the insulator, and a ground electrode facing the center electrode through a spark gap. An end surface of the metal shell has an outer edge and an inner edge, and tapers from the outer edge to the inner edge in a direction toward the inside of an air pocket formed between the metal shell and the insulator. The outer edge of the end surface of the metal shell protrudes from the surface of the cylinder head into the combustion chamber.

摘要翻译： 火花塞和气缸盖组件包括火花塞和发动机的气缸盖。 气缸盖具有孔和与发动机的燃烧室相对的表面，并且孔开放。 火花塞安装在气缸盖的孔中，并且包括金属壳，保持在金属壳中的绝缘体，固定在绝缘体中的中心电极和通过火花隙面对中心电极的接地电极。 金属壳的端面具有外边缘和内边缘，并且在形成于金属壳和绝缘体之间的气穴的内侧的方向上从外边缘到内边缘逐渐变细。 金属壳的端面的外缘从气缸盖的表面突出到燃烧室中。