公开(公告)号：US06205844B1

公开(公告)日：2001-03-27

申请号：US09322024

申请日：1999-05-28

申请人： Shingo Morita ,  Koichi Okamura ,  Mituru Koiwa ,  Yutaka Ohashi

发明人： Shingo Morita ,  Koichi Okamura ,  Mituru Koiwa ,  Yutaka Ohashi

IPC分类号： G01L2322

CPC分类号： F02P17/12 ,  F02D35/027 ,  F02P2017/128

摘要： A combustion state detecting device for an internal combustion engine enables diverse combustion state detection by obtaining a plurality of currents analogous to an ion current. The combustion state detecting device includes a bias circuit 6 that applies an ion current detection voltage to an ignition plug 3 disposed in a cylinder of the internal combustion engine, an ion current signal distributor circuit 20 made up of a current mirror circuit for detecting the ion current on the basis of a voltage from the bias circuit, and current-voltage converter circuits 21 and 22, to thereby produce a plurality of currents analogous to the ion current by the ion current signal distributor circuit.

摘要翻译： 用于内燃机的燃烧状态检测装置通过获得与离子电流类似的多个电流来实现不同的燃烧状态检测。 燃烧状态检测装置包括对设置在内燃机的气缸中的火花塞3施加离子电流检测电压的偏置电路6，由用于检测离子的电流镜电路构成的离子电流信号分配电路20 基于来自偏置电路的电压以及电流 - 电压转换器电路21和22，从而由离子电流信号分配器电路产生类似于离子电流的多个电流。

公开(公告)号：US06196054B1

公开(公告)日：2001-03-06

申请号：US09306512

申请日：1999-05-07

申请人： Koichi Okamura ,  Mituru Koiwa ,  Yutaka Ohashi

发明人： Koichi Okamura ,  Mituru Koiwa ,  Yutaka Ohashi

IPC分类号： G01M1500

CPC分类号： F02P5/152 ,  F02D35/021 ,  F02P2017/128 ,  Y02T10/46

摘要： To obtain a combustion state detecting device in which a detection range is optimized to thereby make it possible to improve the S/N ratio, thereby making it possible to enhance the accuracy in detection of the combustion state of the internal combustion engine, in particular, the accuracy in knock detection. The combustion state detecting device for an internal combustion engine includes an ignition plug 4 which discharges by application of the ignition high voltage to fire a fuel-air mixture within a cylinder of an internal combustion engine, a bias circuit 5 for applying a bias voltage to the ignition plug, a current detector circuit 21 for detecting an ion current corresponding to the quantity of ions which are generated within the cylinder in which the fuel-air mixture is being burned as an ion current detection signal, knock signal processing means 24 to 27 for producing a knock decision signal representative of a knock occurrence state of the internal combustion engine on the basis of the ion current detection signal, and an ECU 15 for detecting the combustion state in the ignition plug on the basis of the ion current detection signal and the knock decision signal. The knock signal processing means sets a detection period of the knock decision signal on the basis of an integral value of the ion current detection signal.

摘要翻译： 为了得到优化检测范围的燃烧状态检测装置，能够提高S / N比，能够提高内燃机的燃烧状态的检测精度， 爆震检测的准确性。 用于内燃机的燃烧状态检测装置包括：火花塞4，其通过施加点火高电压来排放内燃机的气缸内的燃料 - 空气混合物;偏置电路5，用于施加偏置电压 火花塞，电流检测电路21，用于检测与燃料 - 空气混合物燃烧的气缸内产生的离子量对应的离子电流作为离子电流检测信号;爆震信号处理装置24〜27 用于根据离子电流检测信号产生代表内燃机的爆震发生状态的爆震判定信号;以及ECU15，用于基于离子电流检测信号检测火花塞中的燃烧状态;以及 爆震决定信号。 爆震信号处理装置根据离子电流检测信号的积分值设定爆震判定信号的检测周期。

公开(公告)号：US06222367B1

公开(公告)日：2001-04-24

申请号：US09322003

申请日：1999-05-28

申请人： Takeshi Shimizu ,  Koichi Okamura ,  Mituru Koiwa ,  Yutaka Ohashi

发明人： Takeshi Shimizu ,  Koichi Okamura ,  Mituru Koiwa ,  Yutaka Ohashi

IPC分类号： G01M1500

CPC分类号： F02P17/12 ,  F02P2017/125

摘要： There is provided a combustion state detecting device for an internal combustion engine even in the case where disconnection of a secondary current path or misfire in an ignition plug occurs. A voltage developed at the secondary winding low voltage side is suppressed so that the high voltage can be prevented from being leaked. The combustion state detecting device for an internal combustion engine includes a capacitor 8 for charging a positive bias voltage necessary for detecting ions generated when an ignition plug 4 discharges upon application of the ignition high voltage, a resistor 5 disposed between the low voltage side of the secondary winding and the capacitor for suppressing the drop of the bias voltage, ion current detecting means 30 for detecting a discharge current from the capacitor as an ion current flowing through the ignition plug, an ECU 20 for detecting a combustion state in the ignition plug on the basis of a detection value of the ion current detecting means, and a Zener diode 9 for suppressing a voltage developed when a path in which the ion current flows is disconnected.

摘要翻译： 即使在发生火花塞中的二次电流路径断开或失火的情况下，也提供了用于内燃机的燃烧状态检测装置。 抑制在次级绕组低压侧产生的电压，从而可以防止高电压泄漏。 用于内燃机的燃烧状态检测装置包括电容器8，用于对点火高电压时点火塞4放电时产生的离子进行检测所需的正偏置电压充电;电阻器5， 次级绕组和用于抑制偏置电压下降的电容器，用于检测作为流过火花塞的离子电流的来自电容器的放电电流的离子电流检测装置30，用于检测火花塞中的燃烧状态的ECU20 离子电流检测装置的检测值的基础，以及用于抑制当离子电流流动的路径断开时产生的电压的齐纳二极管9。

公开(公告)号：US06216530B1

公开(公告)日：2001-04-17

申请号：US09317168

申请日：1999-05-24

申请人： Takeshi Shimizu ,  Koichi Okamura ,  Mituru Koiwa ,  Yutaka Ohashi

发明人： Takeshi Shimizu ,  Koichi Okamura ,  Mituru Koiwa ,  Yutaka Ohashi

IPC分类号： G01L326

CPC分类号： F02P17/12 ,  F02P2017/121 ,  F02P2017/125

摘要： A combustion state detecting device for an internal combustion engine is obtained which is capable of preventing noises from being superimposed on an ion current, and surely obtaining a desired peak value of the ion current. The combustion state detecting device for the internal combustion engine includes an ignition coil which develops an ignition high voltage, an ignition plug to which the ignition high voltage is applied through a high-voltage path connected to a plurality of output terminals of the ignition coil, bias means for charging a bias voltage necessary for detecting ions which are discharged and generated from the ignition plug, discharge current limiting means for discharging the bias voltage, ion current detecting means for detecting the discharge of the bias voltage as an ion current that flows through the ignition plug, and an ECU for detecting a combustion state in the ignition plug on the basis of a detection value of the ion current, wherein the discharge current limiting means is disposed between an ignition current path formed by discharging the ions from the ignition plug and the bias means.

摘要翻译： 得到一种用于内燃机的燃烧状态检测装置，其能够防止噪声叠加在离子电流上，并且可靠地获得期望的离子电流峰值。 用于内燃机的燃烧状态检测装置包括产生点火高电压的点火线圈，通过与点火线圈的多个输出端连接的高压路径施加点火高电压的火花塞， 用于充电用于检测从火花塞放电和产生的离子所需的偏置电压的偏压装置，用于放电偏压的放电电流限制装置;用于检测偏压的放电的离子电流检测装置，作为流过的离子电流 火花塞和用于根据离子电流的检测值检测火花塞中的燃烧状态的ECU，其中放电电流限制装置设置在通过从火花塞排出离子形成的点火电流路径之间 和偏倚手段。

公开(公告)号：US06202474B1

公开(公告)日：2001-03-20

申请号：US09344378

申请日：1999-06-25

申请人： Yasuhiro Takahashi ,  Koichi Okamura ,  Mituru Koiwa ,  Yutaka Ohashi

发明人： Yasuhiro Takahashi ,  Koichi Okamura ,  Mituru Koiwa ,  Yutaka Ohashi

IPC分类号： G01L2322

CPC分类号： G01L23/221 ,  F02P17/12

摘要： For a purpose of improving detecting performance toward knocking in small and middle intensity which must be detected as a top priority to conduct regulation of ignition timing, a device is provided to vary an output gain of an alternating component included in an ion current in accordance with ion current quantity. An ion current detector to detect the ion current to be generated surrounding an ignition plug just after mixed gas inside a cylinder has been ignited with a spark discharge having occurred at the ignition plug due to a voltage generated by an ignition coil, comprises a bias voltage generating part to generate a high voltage for an ion current detection to be applied to the ignition plug via the ignition coil, an ion current-to-voltage conversion part to convert an ion current having flowed between electrodes of the ignition plug by the high voltage into a voltage, and a knock signal generator to extract and amplify a frequency band resembling knocks on the basis of voltage conversion effect.

摘要翻译： 为了提高检测性能以敲击中小强度，必须将其作为最高优先级来检测点火正时的调节，提供一种装置，以改变包括在离子电流中的交替分量的输出增益，根据 离子电流量。 一种离子电流检测器，用于检测恰好在气缸内的混合气体之后即将产生的火花塞周围产生的离子电流已被点火线圈产生的电压引起的火花塞点火，包括偏置电压 产生部分以产生用于经由点火线圈施加到火花塞的离子电流检测的高电压;离子电流 - 电压转换部分，用于将在火花塞的电极之间流动的离子电流转换为高电压 成为一个电压，一个爆震信号发生器提取和放大一个类似敲击的频带，基于电压转换效应。

公开(公告)号：US06311672B1

公开(公告)日：2001-11-06

申请号：US09496252

申请日：2000-02-01

申请人： Tsutomu Morishita ,  Yasuhiro Takahashi ,  Koichi Okamura ,  Mitsuru Koiwa ,  Yutaka Ohashi

发明人： Tsutomu Morishita ,  Yasuhiro Takahashi ,  Koichi Okamura ,  Mitsuru Koiwa ,  Yutaka Ohashi

IPC分类号： F02P1152

CPC分类号： F02D35/027 ,  F02P5/1525 ,  F02P17/12 ,  F02P2017/128 ,  G01L23/225 ,  Y02T10/46

摘要： A device for controlling knocking of an internal combustion engine featuring improved reliability by preventing signals of the knocking level from being erroneously detected as those of the noise level. The device detects an ionic current flowing through a spark plug, counts a signal of the knocking level from the ionic current, establishes an average knocking level from the signals of the knocking level and determines a background level from the average knocking level. A comparator judges the knocking state by comparing the signal of the knocking level with the background level. The device calculates the control quantity of the engine based on the operation conditions and the result of judgement of knocking. The device further judges a transient state and decreases the average knocking level depending upon a transience judgment signal in order to maintain a background level in a transient state at an optimum value.

摘要翻译： 一种用于通过防止爆震级别的信号被错误地检测为噪声水平的信号来控制具有改进的可靠性的内燃机的爆震的装置。 该装置检测流过火花塞的离子电流，从离子电流计数敲击电平的信号，从敲击电平的信号建立平均敲击电平，并从平均敲击电平确定背景电平。 比较器通过将敲击级别的信号与背景级别进行比较来判断敲击状态。 该装置根据操作条件和敲击判断结果计算发动机的控制量。 该装置进一步判断瞬态状态，并根据瞬态判断信号降低平均敲击电平，以将瞬态中的背景电平维持在最佳值。

公开(公告)号：US06418785B1

公开(公告)日：2002-07-16

申请号：US09531326

申请日：2000-03-20

申请人： Yasuyoshi Hatazawa ,  Koichi Okamura ,  Mitsuru Koiwa ,  Yutaka Ohashi ,  Hisanori Nobe

发明人： Yasuyoshi Hatazawa ,  Koichi Okamura ,  Mitsuru Koiwa ,  Yutaka Ohashi ,  Hisanori Nobe

IPC分类号： G01M1500

CPC分类号： F02P17/12 ,  F02D35/021 ,  F02D2200/1015 ,  F02P2017/125 ,  G01M15/11

摘要： A misfire detecting apparatus for an internal combustion engine detects only an ion current due to combustion of an air/fuel mixture regardless of a leakage current when combustion: takes place normally. The apparatus includes circuitry for detecting an ion current generated within the engine cylinder immediately after combustion, circuitry 21, 24, 26 for detecting a leakage current occurring between electrodes of a spark plug 14, a first waveform shaper 18 for shaping the ion current into a pulse signal indicating a combustion or misfire event by comparing the pulse signal with a first threshold value for deciding the ion current, the first threshold value being set on the basis of a level of the ion current upon rising thereof, the ion current being superposed on the leakage current, a second waveform shaper 20 for shaping the ion current as detected into a pulse signal through comparison with a second fixed threshold value which is fixed at a value smaller than the first threshold value, and a selector 22 for selectively outputting as the combustion pulse signal either a shaped pulse signal outputted from the first waveform shaper 18 upon detection of occurrence of the leakage current or a shaped pulse signal outputted from the second waveform shaper 20 when no leakage current is detected.

摘要翻译： 用于内燃机的失火检测装置仅在燃烧时正常地检测由空气/燃料混合物的燃烧引起的离子电流，而不管泄漏电流如何。 该装置包括用于检测在燃烧之后立即在发动机气缸内产生的离子电流的电路，用于检测在火花塞14的电极之间产生的漏电流的电路21,24,26，用于将离子电流整形成第一波形整形器18 通过将脉冲信号与用于决定离子电流的第一阈值进行比较来指示燃烧或失火事件的脉冲信号，基于上升时离子电流的电平设定第一阈值，离子电流叠加在 泄漏电流，第二波形整形器20，用于通过与固定在小于第一阈值的值的第二固定阈值进行比较，将检测到的离子电流整形为脉冲信号;以及选择器22，用于选择性地输出为 燃烧脉冲信号是在检测出渗漏曲线时从第一波形整形器18输出的成形脉冲信号 nt或从第二波形整形器20输出的成形脉冲信号，当没有检测到泄漏电流时。

公开(公告)号：US06275041B1

公开(公告)日：2001-08-14

申请号：US09500477

申请日：2000-02-09

申请人： Koichi Okamura ,  Yasuyoshi Hatazawa ,  Shu Sasaki ,  Mitsuru Koiwa ,  Yutaka Ohashi ,  Hisanori Nobe

发明人： Koichi Okamura ,  Yasuyoshi Hatazawa ,  Shu Sasaki ,  Mitsuru Koiwa ,  Yutaka Ohashi ,  Hisanori Nobe

IPC分类号： F02B1700

CPC分类号： F02P17/12 ,  F02P2017/125

摘要： A combustion state detecting apparatus for an internal combustion engine is imparted with facility for determining discriminatively the causes for non-occurrence of combustion. The apparatus includes a spark plug (4) for generating a spark discharge upon application of a high voltage generated by an ignition coil (1) in response to an ignition signal (X1) to thereby fire an air-fuel mixture within a cylinder of the internal combustion engine, an ion current detecting means (6A) for detecting as ion current detection signals (X2a; X2) an ion current corresponding to an amount of ions produced within the cylinder immediately after combustion of the air-fuel mixture, a signal detecting means (7A; 7B; 9) for comparing the ion current detection signal (X2a) outputted from the ion current detecting means (6A) with a first reference voltage (Vth1) to thereby output a first decision signal (X3) while comparing the ion current detection signal (X2) with a second reference voltage (Vth2) to thereby output a second decision signal (X4) while invalidating output of the second decision signal (X4) during a predetermine time period from a time point at which the comparison of the ion current detection signal (X2) with the second reference voltage (Vth2) is started, and an estimating logic unit (9, 10; 112) for estimating a cause for nongeneration of a combustion signal on the basis of output statuses of the first decision signal (X3) and the second decision signal (X4).

摘要翻译： 用于内燃机的燃烧状态检测装置被赋予用于确定不发生燃烧的原因的设备。 该装置包括火花塞（4），用于在施加由点火线圈（1）响应于点火信号（X1）产生的高电压时产生火花放电，从而使位于所述火花塞内的气缸内的空气燃料混合物 内燃机，用于检测作为离子电流检测信号（X2a; X2）的离子电流检测装置，其中所述离子电流对应于在所述空气 - 燃料混合物燃烧后立即产生的气缸内产生的离子的量， 用于将从离子电流检测装置（6A）输出的离子电流检测信号（X2a）与第一参考电压（Vth1）进行比较的装置（7A; 7B; 9），从而输出第一判定信号（X3），同时比较离子 具有第二参考电压（Vth2）的电流检测信号（X2），从而在从比较的时间点起的预定时间段期间使第二判定信号（X4）的输出无效的同时输出第二判定信号（X4） 开始具有第二参考电压（Vth2）的离子电流检测信号（X2），估计逻辑单元（9,10; 112），用于基于第一判定信号（X3）和第二判定信号（X4）的输出状态来估计燃烧信号的非燃性原因。

公开(公告)号：US06328016B1

公开(公告)日：2001-12-11

申请号：US09500478

申请日：2000-02-09

申请人： Yasuhiro Takahashi ,  Koichi Okamura ,  Mitsuru Koiwa ,  Yutaka Ohashi

发明人： Yasuhiro Takahashi ,  Koichi Okamura ,  Mitsuru Koiwa ,  Yutaka Ohashi

IPC分类号： F02P5152

CPC分类号： F02P5/152 ,  F02P17/12 ,  Y02T10/46

摘要： A knock suppression control apparatus for an internal combustion engine which can avoid erroneous knock detection and hence the erroneous knock suppression control, to thereby ensure knock suppression control with high reliability. The knock suppression control apparatus includes an ion current detecting means (10) for detecting an ion current (i) flowing by way of a spark plug (8) upon combustion of an air-fuel mixture charged in the cylinder, a filter means (14A) for extracting a knock signal (Kj) from an output signal (Ei) of the ion current detecting means (10), a knock decision means (23) for deciding occurrence of a knock event in the engine on the basis of the knock signal (Kj), a control quantity correcting means (24) for correcting a control quantity for the internal combustion engine so as to suppress the knock event on the basis of result (H) of decision made by the knock decision means (23), an integrating means (16, 16A) for arithmetically determining an integral value (Km; Em) which corresponds to an output level of the ion current (Ei), a comparison level setting means (26, 26A) for setting a predetermined comparison reference level (MR) for the integral value (Km; Em), and a correcting quantity arithmetic means (25, 25A) for outputting a correcting signal (M1; M2) for correcting parameters relevant to the knock decision means (23) or alternatively relevant to the control quantity correcting means (24) on the basis of result of the comparison between the integral value (Km; Em) and the comparison reference level (MR).

摘要翻译： 一种用于内燃机的爆震抑制控制装置，其可以避免错误的爆震检测和因此的错误的爆震抑制控制，从而以高可靠性确保爆震抑制控制。 爆震抑制控制装置包括：离子电流检测装置（10），用于检测在汽缸内装入的空气燃料混合物燃烧时通过火花塞（8）流动的离子流（i）;过滤装置（14A） ），用于从离子电流检测装置（10）的输出信号（Ei）提取爆震信号（Kj）;基于爆震信号判定发动机爆震事件的爆震判定装置（23） （Kj），用于根据由所述爆震判定装置（23）作出的判定结果（H）来校正所述内燃机的控制量以抑制所述爆震事件的控制量校正装置， 用于算术确定对应于离子电流（Ei）的输出电平的积分值（Km; Em）的积分装置（16,16A），用于设定预定比较基准电平的比较电平设定装置（26,26A） MR）和积分值（Km; Em）和校正量ar 算术装置（25,25A），用于输出校正信号（M1; M2），用于根据积分值（Km; Em）和比较参考电平（MR）之间的比较结果校正与爆震判定装置（23）相关的参数，或者与控制量校正装置（24）相关 ）。

公开(公告)号：US06334353B1

公开(公告)日：2002-01-01

申请号：US09482514

申请日：2000-01-14

申请人： Hisanori Nobe ,  Yasuyoshi Hatazawa ,  Koichi Okamura ,  Mitsuru Koiwa ,  Yutaka Ohashi

发明人： Hisanori Nobe ,  Yasuyoshi Hatazawa ,  Koichi Okamura ,  Mitsuru Koiwa ,  Yutaka Ohashi

IPC分类号： G01M1500

CPC分类号： G01L23/225

摘要： To obtain a knock detection apparatus for an internal combustion engine which may obtain a good knock pulse S/N even if an ionic current generation amount is changed by the change of a kind of fuel or plugs, a vibratory component superimposed on an ionic current generated by combustion of fuel is extracted and shaped in waveform into a pulse waveform by comparison with a threshold value, the number of the pulses in the pulse waveform is calculated by a calculation unit, and a control of an ignition timing is performed on the basis of an output result of the calculation unit. The knock detection apparatus for an internal combustion engine comprises an integration circuit for integrating (charging) the vibratory component superimposed on the ionic current and a discharge circuit for discharging a predetermined amount of charge from the integrated charge. The threshold value is self-adjusted by a balance of charge/discharge between the integration circuit and the discharge circuit.

摘要翻译： 为了获得即使离子电流产生量通过燃料或塞子的种类的变化而改变也可获得良好的爆震脉冲S / N的内燃机爆震检测装置，产生叠加在离子电流上的振动成分 通过与阈值进行比较，将燃料燃烧提取并形成波形成脉搏波形，通过计算单元计算脉搏波形中的脉冲数，并基于以下方式进行点火正时的控制 计算单元的输出结果。 用于内燃机的爆震检测装置包括用于对叠加在离子电流上的振动分量进行积分（充电）的积分电路和用于从集成电荷中排出预定量的电荷的放电电路。 通过积分电路和放电电路之间的充电/放电的平衡来自动调整阈值。