公开(公告)号：US6104195A

公开(公告)日：2000-08-15

申请号：US832201

申请日：1997-04-08

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

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

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

CPC classification number: G01N27/62 ,  G01N27/68

Abstract: 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：US06111345A

公开(公告)日：2000-08-29

申请号：US919443

申请日：1997-08-28

Applicant: Masamichi Shibata ,  Toshiaki Yamaura

Inventor： Masamichi Shibata ,  Toshiaki Yamaura

IPC: F02P13/00 ,  H01T13/20

CPC classification number: H01T13/20 ,  F02P13/00

Abstract: In a spark plug having a generally cylindrically shaped metallic body, a generally cylindrically shaped insulator held in the metallic body, a center electrode held in the insulator, and a ground electrode facing the center electrode, the insulator has a ramp portion on an outside surface thereof and the metallic body has a supporting portion for supporting the ramp portion of the insulator. Further, a conductive layer (a protection layer) is formed on the surface of the insulator to face the supporting portion of the metallic body. Accordingly, a corona discharge in a clearance between the supporting portion of the metallic body and the insulator is prevented, so that spike-like noise can be prevented.

Abstract translation: 在具有大致圆柱形金属体的火花塞中，保持在金属体中的大致圆柱形的绝缘体，保持在绝缘体中的中心电极和面对中心电极的接地电极，绝缘体在外表面上具有斜坡部分 并且金属体具有用于支撑绝缘体的斜坡部分的支撑部分。 此外，在绝缘体的表面上形成导电层（保护层）以面对金属体的支撑部。 因此，防止了金属体的支撑部分和绝缘体之间的间隙中的电晕放电，从而可以防止尖峰状噪声。

公开(公告)号：US5970952A

公开(公告)日：1999-10-26

申请号：US95341

申请日：1998-06-10

Applicant: Kazuhisa Mogi ,  Koichi Nakata ,  Toshiaki Yamaura ,  Eiji Takakuwa ,  Yasuo Ito

Inventor： Kazuhisa Mogi ,  Koichi Nakata ,  Toshiaki Yamaura ,  Eiji Takakuwa ,  Yasuo Ito

IPC: G01M15/04 ,  F02D41/22 ,  F02D45/00 ,  F02P11/00 ,  F02P11/02 ,  F02P17/00 ,  F02P17/12 ,  F02P5/00

CPC classification number: F02P17/12 ,  F02D41/222 ,  F02P11/02 ,  Y02T10/40

Abstract: A combustion state detector apparatus for an internal combustion engine has a current detection device for detecting a current flowing between the ignition plug and a ground, and an ignition driving device for driving the ignition plug on the basis of an ignition instruction signal from an electronic control device of the internal combustion engine. An independent unit including a current detection device and an ignition driving device, is provided for each cylinder of the internal combustion engine. With respect to each cylinder, the apparatus determines whether a misfire has occurred on the basis of the current flowing between the ignition plug and the ground at the time of combustion. The apparatus is also capable of detecting abnormalities and/or wire breakages in a signal system provided for signal transmission between each independent unit and the electronic control device of the internal combustion engine.

Abstract translation: 用于内燃机的燃烧状态检测器装置具有用于检测在火花塞和地面之间流动的电流的电流检测装置和用于根据来自电子控制器的点火指示信号驱动火花塞的点火驱动装置 内燃机装置。 为内燃机的每个气缸设置有包括电流检测装置和点火驱动装置的独立单元。 关于每个气缸，该装置基于在燃烧时在火花塞和地面之间流动的电流来确定是否发生了失火。 该装置还能够检测为每个独立单元和内燃机的电子控制装置之间的信号传输提供的信号系统中的异常和/或断线。