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：US06336355B1

公开(公告)日：2002-01-08

申请号：US09496277

申请日：2000-02-01

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

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

IPC分类号： G01M1500

CPC分类号： G01L23/225 ,  F02B77/08 ,  F02D35/021 ,  F02D41/009 ,  F02P17/12 ,  F02P2017/128 ,  G01L23/221

摘要： To provide a combustion condition detecting apparatus for an internal combustion engine, which may well detect the combustion conditions such as discrimination of a combustion cylinder and knock generating condition and may reduce a circuit scale therefor, there are provided an ignition coil 21 provided for each cylinder; an ignition plug 20 for discharging by the application of the ignition high tension voltage to ignite mixture within the cylinder; a bias circuit 1 provided for each cylinder for applying a bias voltage to the ignition plug 20; an ionic current detection circuit 2 provided for each cylinder for detecting as an ionic current detection signal an ionic current 6 generated in the cylinder that is immediately after the combustion of the mixture; a knock signal processing circuit 4 provided one for a combination of a plurality of cylinders that are every two or more cylinders in ignition order on the basis of a sum of the ionic current detection signals; and an ECU 5 for detecting the combustion condition of the ignition plug on the basis of the knock signal.

摘要翻译： 为了提供一种用于内燃机的燃烧条件检测装置，其可以很好地检测诸如识别燃烧气缸和爆震发生状况的燃烧条件，并且可以减小其电路规模，设置有用于每个气缸的点火线圈21 ; 火花塞20，用于通过施加点火高压电压进行放电以点燃气缸内的混合物; 为每个气缸设置的偏置电路1，用于向火花塞20施加偏置电压; 为每个气缸设置的离子电流检测电路2，用于检测作为离子电流检测信号的离子电流6，其在混合物燃烧之后立即在汽缸中产生; 爆震信号处理电路4，其基于离子电流检测信号的总和，以点火顺序设置每个两个或更多个气缸的多个气缸的组合; 以及用于基于爆震信号检测火花塞的燃烧状态的ECU5。

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：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。

公开(公告)号：US06378494B1

公开(公告)日：2002-04-30

申请号：US09628421

申请日：2000-07-28

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

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

IPC分类号： F02P5152

CPC分类号： F02P5/152 ,  F02P17/12 ,  F02P2017/128 ,  G01L23/221 ,  G01L23/225 ,  Y02T10/46

摘要： To obtain a knock detection apparatus 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 knock detection apparatus for detecting a knock generated, in an internal combustion engine, in which a vibratory component superimposed on an ionic current generated by combustion of fuel is extracted, the component that is equal to or more than a knock detection threshold value is shaped in waveform into a pulse waveform, a knock strength is calculated through counting and calculation process of the number of pulses of the pulse waveform by an engine controlling unit, an ignition timing is controlled on the basis of the knock strength, comprises a knock detection threshold value adjusting unit for changing the knock detection threshold value on the basis of information of an ionic current.

摘要翻译： 为了获得能够通过燃料或塞的种类的变化来改变离子电流产生量而获得良好的爆震脉冲S / N的爆震检测装置，用于检测在内燃中产生的爆震的爆震检测装置 其中提取了叠加在由燃料燃烧产生的离子电流上的振动分量，将等于或大于爆震检测阈值的分量波形整形为脉冲波形，通过计数计算爆震强度 以及由发动机控制单元对脉搏波形的脉冲数的计算处理，基于爆震强度来控制点火正时，包括用于根据爆震检测阈值调整单元改变爆震检测阈值的爆震检测阈值调整单元 离子电流信息。

公开(公告)号：US06427662B2

公开(公告)日：2002-08-06

申请号：US09726519

申请日：2000-12-01

申请人： Kimihiko Tanaya ,  Yasuyoshi Hatazawa ,  Koichi Okamura ,  Mitsuru Koiwa

发明人： Kimihiko Tanaya ,  Yasuyoshi Hatazawa ,  Koichi Okamura ,  Mitsuru Koiwa

IPC分类号： F02P5152

CPC分类号： F02P5/1523 ,  G01L23/221 ,  G01L23/225 ,  Y02T10/46

摘要： A knock control apparatus for an internal combustion engine includes a knock detector for extracting a vibration component superposed on an ion current, and waveform shaping it at a predetermined threshold value to generate a train of knock pulses (Kp) of which the number of pulses indicates a knock intensity of a knock generated in the internal combustion engine, and an engine control unit for counting the number of knock pulses (npn) in the knock pulse train (Kp) output from the knock detector. The engine control unit judges, based on the number of knock pulses (npn), whether or not a knock is occurring. The engine control unit performs a peak hold of the number of knock pulses to calculate the knock judgement threshold value (BGL) by multiplying the number of pulses by (&agr;). Thus, precision in knock judgement is improved by performing knock judgement based on a maximum value (MAX) of the number of knock pulses (npn).

摘要翻译： 用于内燃机的爆震控制装置包括用于提取叠加在离子电流上的振动分量的爆震检测器，以及以预定阈值对其进行波形整形以产生脉冲数指示的一系列爆震脉冲（Kp） 在内燃机中产生的撞击的爆震强度，以及用于计算从爆震检测器输出的爆震脉冲串（Kp）中的爆震脉冲数（npn）的发动机控制单元。 发动机控制单元基于爆震脉冲数（npn）判断是否发生爆震。 引擎控制单元通过将脉冲数乘以（α）来执行敲击脉冲数的峰值保持以计算爆震判定阈值（BGL）。 因此，通过基于爆震脉冲数（npn）的最大值（MAX）进行爆震判断来提高爆震判断的精度。

公开(公告)号：US06234146B1

公开(公告)日：2001-05-22

申请号：US09495487

申请日：2000-02-01

申请人： Kimihiko Tanaya ,  Yasuhiro Takahashi ,  Yasuyoshi Hatazawa ,  Mitsuru Koiwa

发明人： Kimihiko Tanaya ,  Yasuhiro Takahashi ,  Yasuyoshi Hatazawa ,  Mitsuru Koiwa

IPC分类号： F02P5152

CPC分类号： G01L23/225 ,  F02P5/152 ,  Y02T10/46

摘要： A knock control device for an internal combustion engine includes means 12 for calculating a knock level signal N on the basis of an ionic current, means 20 for arithmetically estimating a maximum noise level MN on the basis of a variation in the knock level signal, means 25 for obtaining a noise peak value PA on the basis of the maximum noise level, means 14A for calculating a background level BGLA on the basis of the noise peak value, means 15 for judging the knock on the basis of the background level, and means 7 for arithmetically operating the controlled variable on the basis of the knock judgement result.

摘要翻译： 用于内燃机的爆震控制装置包括用于基于离子电流计算爆震级信号N的装置12，用于基于爆震级信号的变化对算法估计最大噪声电平MN的装置20， 25，用于基于最大噪声电平获得噪声峰值PA;基于噪声峰值计算背景电平BGLA的装置14A;基于背景电平判断敲击的装置15;以及装置 7用于根据敲击判断结果算术操作受控变量。

公开(公告)号：US5952824A

公开(公告)日：1999-09-14

申请号：US895415

申请日：1997-07-16

申请人： Izuru Shinjo ,  Yasuyoshi Hatazawa ,  Naoki Hiraoka ,  Yutaka Ohashi

发明人： Izuru Shinjo ,  Yasuyoshi Hatazawa ,  Naoki Hiraoka ,  Yutaka Ohashi

IPC分类号： G01P3/488 ,  G01B7/00 ,  G01B7/30 ,  G01D5/14 ,  G01D5/16 ,  G01D5/20 ,  G01D5/245 ,  G01R33/09 ,  G08C17/04 ,  H02H9/04 ,  H03K5/01 ,  G01P7/481

CPC分类号： G01R33/093 ,  B82Y25/00 ,  G01D5/147

摘要： A magnetic detecting apparatus is capable of performing accurate waveform processing without being affected by noise signals or the like, the level shifting circuit thereof having a fixed voltage shift so as to be free of varying amplitudes of analog signals. Waveform shaping circuitry for turning an analog signal detected from a giant magnetoresistive element into a pulse signal includes: the level shifting circuit for generating an amplified voltage (V1) of analog signals and a voltage (V2) which is higher than the voltage (V1) and a voltage (V3) which is lower than the voltage (V1); a circuit which alternately retains the minimum value of the voltage (V2) and the maximum value of the voltage (V3) as a reference voltage; and a comparator circuit which compares a voltage resulting from adding a hysteresis to the voltage (V1) with the reference voltage and issues a pulse signal. The level shifting circuit is constituted by resistors inserted between the output terminal of the voltage (V1) and the output terminals of the voltages (V2, V3), and constant-current circuits connected in series with the resistors.

摘要翻译： 磁检测装置能够进行精确的波形处理而不受噪声信号等的影响，其电平移位电路具有固定的电压偏移，以便没有变化的模拟信号幅度。 用于将从巨磁阻元件检测的模拟信号转换成脉冲信号的波形整形电路包括：用于产生模拟信号的放大电压（V1）的电平移位电路和高于电压（V1）的电压（V2） 和低于电压（V1）的电压（V3）; 交替地保持电压（V2）的最小值和电压（V3）的最大值作为参考电压的电路; 以及比较器电路，其将由滞后增加的电压与参考电压（V1）进行比较，并发出脉冲信号。 电平移动电路由插入在电压（V1）的输出端和电压（V2，V3）的输出端之间的电阻和与电阻串联连接的恒流电路构成。

公开(公告)号：US06528992B2

公开(公告)日：2003-03-04

申请号：US09168669

申请日：1998-10-09

申请人： Izuru Shinjo ,  Yasuyoshi Hatazawa ,  Takuji Nada ,  Masahiro Yokotani

发明人： Izuru Shinjo ,  Yasuyoshi Hatazawa ,  Takuji Nada ,  Masahiro Yokotani

IPC分类号： G01B730

CPC分类号： G01R33/09

摘要： A magnetic detector for detecting a rotational angle of a gear-like rotary member of magnet material generates twice as many pulses as the number of projected or recessed portions of the rotary member of magnetic material. The magnetic detector comprises a magnet for generating a magnetic field, a rotary member of magnetic material disposed with a predetermined gap retaining relative to the magnet, and an magnetic field sensing device for detecting changes in the magnetic field by movement of the moving member of magnetic material. The magnetic field sensing device is disposed relative to the magnet so that a center axis of the magnetic field sensing device is aligned with a center axis of the magnet wherein a magnetic field acting on the magnetic field sensing device changes from positive to negative and from negative to positive with the movement of the moving member of magnetic material.

摘要翻译： 用于检测磁体材料的齿轮状旋转构件的旋转角度的磁检测器产生与磁性材料的旋转构件的突出或凹入部分的数量相同的脉冲数量的两倍。 磁检测器包括用于产生磁场的磁体，以相对于磁体保持预定间隙的方式设置的磁性材料的旋转部件，以及用于通过磁性移动部件的移动来检测磁场变化的磁场检测装置 材料。 磁场感测装置相对于磁体设置，使得磁场感测装置的中心轴线与磁体的中心轴线对齐，其中作用在磁场感测装置上的磁场从正向负变为负 随着磁性材料的移动构件的移动而呈正。

公开(公告)号：US06177793B1

公开(公告)日：2001-01-23

申请号：US09163980

申请日：1998-09-30

申请人： Izuru Shinjo ,  Yasuyoshi Hatazawa ,  Takuji Nada ,  Masahiro Yokotani

发明人： Izuru Shinjo ,  Yasuyoshi Hatazawa ,  Takuji Nada ,  Masahiro Yokotani

IPC分类号： G01B730

CPC分类号： G01R33/09

摘要： A magnetic detector D is disclosed which can perform precise detection even when a moving member of magnetic material is rotating at a very low speed, and can output a signal corresponding to recessed and projected portions of the moving member of magnetic material when the power is turned on and when the rotary member of magnetic material is stopped. The magnetic detector includes a rotary member of magnetic material, a detecting unit for detecting a displacement of the rotary member of magnetic material, an AC coupling circuit for removing a DC component from an output signal of the detecting unit, a comparison circuit for converting an output signal of the AC coupling circuit into a binary signal, an output circuit for outputting an output signal of the comparison circuit, and a variable resistor for setting a comparison level for the comparison circuit to a level between two different signal levels.

摘要翻译： 磁性检测器D被公开，即使当磁性材料的移动部件以非常低的速度旋转时也能进行精确的检测，并且当电力转动时，可以输出对应于磁性材料的移动部件的凹入和突出部分的信号 当磁性材料的旋转构件停止时。 磁检测器包括磁性材料的旋转部件，用于检测磁性材料的旋转部件的位移的检测单元，用于从检测单元的输出信号中去除直流分量的AC耦合电路，用于转换 AC耦合电路的输出信号转换为二进制信号，输出电路，输出比较电路的输出信号，以及可变电阻，用于将比较电路的比较电平设定为两个不同信号电平之间的电平。