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1. 发明授权

US06295862B1 Gas concentration measuring apparatus compensating for error component of output signal 有权
标题翻译：补偿输出信号误差分量的气体浓度测量装置
公开(公告)号：US06295862B1
公开(公告)日：2001-10-02
申请号：US09432067
申请日：1999-11-02
申请人： Eiichi Kurokawa , Tomoo Kawase , Satoshi Hudu , Toshiyuki Suzuki , Satoshi Nakamura
发明人： Eiichi Kurokawa , Tomoo Kawase , Satoshi Hudu , Toshiyuki Suzuki , Satoshi Nakamura
IPC分类号： G01N27416
CPC分类号： G01N27/419
摘要： A gas concentration measuring apparatus is provided which measures the concentration of two kinds of gas components such as O2 and NOx contained in exhaust gasses of an internal combustion engine of automotive vehicles. The apparatus has a gas sensor which includes a first cell responsive to application of a voltage to discharge O2 in the exhaust gasses to the outside and produce an electric current as a function of concentration of the discharged O2 and a second cell responsive to application of a voltage to produce an electric current as a function of concentration of NOx in the exhaust gasses from which the O2 is discharged by the first cell. The apparatus offsets an error component of the electric current produced by the second cell which depends upon O2 contained in the exhaust gasses, or which in related operations, depends upon any residual oxygen remaining in the second cell without being discharged by the first cell.
摘要翻译：提供一种气体浓度测量装置，其测量机动车辆的内燃机的废气中所含的两种气体成分如O 2和NO x的浓度。该装置具有气体传感器，该气体传感器包括响应于施加电压以将废气中的O 2排放到外部并产生作为排放的O 2的浓度的函数的电流的第一单元和响应于应用电压以产生作为第一电池从其排出O2的废气中的NOx的浓度的函数的电流。该装置抵消由第二电池产生的电流的误差分量，其取决于废气中所含的O 2，或者在相关操作中取决于残留在第二电池中的任何残余氧而不被第一电池放电。

2. 发明授权

US06442998B1 Gas concentration measuring apparatus compensating for error component of output signal 有权
公开(公告)号：US06442998B1
公开(公告)日：2002-09-03
申请号：US09899845
申请日：2001-07-09
申请人： Eiichi Kurokawa , Tomoo Kawase , Satoshi Hada , Toshiyuki Suzuki , Satoshi Nakamura
发明人： Eiichi Kurokawa , Tomoo Kawase , Satoshi Hada , Toshiyuki Suzuki , Satoshi Nakamura
IPC分类号： G01N27416
摘要： A gas concentration measuring apparatus is provided which measures the concentration of two kinds of gas components such as O2 and NOx contained in exhaust gasses of an internal combustion engine of automotive vehicles. The apparatus has a gas sensor which includes a first cell responsive to application of a voltage to discharge O2 in the exhaust gasses to the outside and produce an electric current as a function of concentration of the discharged O2 and a second cell responsive to application of a voltage to produce an electric current as a function of concentration of NOx in the exhaust gasses from which the O2 is discharged by the first cell. The apparatus offsets an error component of the electric current produced by the second cell which depends upon O2 contained in the exhaust gasses.

3. 发明授权

US07981265B2 Gas concentration measuring apparatus designed to enhance measurement accuracy in desired range 有权
标题翻译：气体浓度测量仪设计用于提高所需范围内的测量精度
公开(公告)号：US07981265B2
公开(公告)日：2011-07-19
申请号：US11797961
申请日：2007-05-09
申请人： Tomoo Kawase , Eiichi Kurokawa , Satoshi Hada , Toshiyuki Suzuki , Katsuhide Akimoto
发明人： Tomoo Kawase , Eiichi Kurokawa , Satoshi Hada , Toshiyuki Suzuki , Katsuhide Akimoto
IPC分类号： G01N27/41
CPC分类号： G01N27/419 , F02D41/1454 , F02D41/28 , G01R1/203 , G01R15/08 , G01R19/0092
摘要： A gas concentration measuring apparatus for use in air-fuel ratio control of automotive engines is designed to determine the concentration of oxygen within a wide and a narrow range using a sensor current flowing through a sensor element. The apparatus includes an amplifier circuit equipped with an operational amplifier and a plurality of amplifying resistors and a switch. The switch is responsive to a request signal to switch a relation in electrical connection between an operational amplifier and the amplifying resistors to distribute the amplifying resistors into an input resistor and a feedback resistor for the operational amplifier to change an amplification factor of the amplifier circuit. This results in a change in resolution of measurement of the concentration of oxygen, thereby ensuring enhanced accuracy in determining the concentration of oxygen in a selected one of the narrow and wide ranges.
摘要翻译：用于汽车发动机的空燃比控制的气体浓度测量装置设计成使用流过传感器元件的传感器电流来确定宽范围和窄范围内的氧浓度。该装置包括配备有运算放大器和多个放大电阻器和开关的放大器电路。开关响应于请求信号以在运算放大器和放大电阻之间的电气连接中切换关系，以将放大电阻器分配到输入电阻器和用于运算放大器的反馈电阻器以改变放大器电路的放大系数。这导致测量氧浓度的分辨率的变化，从而确保在选定的窄范围和宽范围内确定氧气浓度的提高的准确性。

4. 发明授权

US06868712B2 Control method for gas concentration sensor 有权
标题翻译：气体浓度传感器控制方法
公开(公告)号：US06868712B2
公开(公告)日：2005-03-22
申请号：US10032582
申请日：2002-01-02
申请人： Satoshi Hada , Eiichi Kurokawa , Toshiyuki Suzuki , Tomoo Kawase , Satoshi Haseda
发明人： Satoshi Hada , Eiichi Kurokawa , Toshiyuki Suzuki , Tomoo Kawase , Satoshi Haseda
IPC分类号： G01N27/41 , F02D41/14 , G01D18/00 , G01N19/10 , G01N21/00 , G01N25/00 , G01N27/00
CPC分类号： F02D41/1495 , F02D41/1456 , Y10T436/218
摘要： An A/F signal proportional to an oxygen concentration in the exhaust gas from an internal combustion engine is output upon application of a voltage based on an instruction from a microcomputer. At the time an element resistance is detected, a bias instruction signal Vr from the microcomputer is converted by a D/A converter 21 to an analog signal Vb. An output voltage Vc obtained by removing high frequency components from the analog signal Vb through an LPF 22 is input to a bias control circuit 40. During this time period in which the element resistance is detected, an accurate A/F signal is not output. Therefore, the A/F signal that has theretofore prevailed is held by a Sample/Hold circuit 70 to thereby prevent the use of an erroneous A/F signal. Namely, at the time of detecting the element resistance, the detected value of the oxygen concentration is prevented from becoming abnormal. As a result, an accurate A/F control can be executed using the detected element resistance.
摘要翻译：与来自内燃机的废气中的氧气浓度成比例的A / F信号是在基于微型计算机的指令施加电压时输出的。在检测到元件电阻时，来自微型计算机的偏置指令信号Vr由D / A转换器21转换成模拟信号Vb。将通过LPF22从模拟信号Vb除去高频分量而获得的输出电压Vc输入到偏置控制电路40.在检测到元件电阻的该时间段期间，不输出精确的A / F信号。因此，由采样/保持电路70保持已经存在的A / F信号，从而防止使用错误的A / F信号。也就是说，在检测元件电阻时，防止氧浓度的检测值变得异常。结果，可以使用检测到的元件电阻来执行精确的A / F控制。

5. 发明授权

US06347544B1 Control method for gas concentration sensor 失效
公开(公告)号：US06347544B1
公开(公告)日：2002-02-19
申请号：US09064163
申请日：1998-04-22
申请人： Satoshi Hada , Eiichi Kurokawa , Toshiyuki Suzuki , Tomoo Kawase , Satoshi Haseda
发明人： Satoshi Hada , Eiichi Kurokawa , Toshiyuki Suzuki , Tomoo Kawase , Satoshi Haseda
IPC分类号： G01N2700
CPC分类号： F02D41/1495 , F02D41/1456 , Y10T436/218
摘要： An A/F signal proportional to an oxygen concentration in the exhaust gas from an internal combustion engine is output upon application of a voltage based on an instruction from a microcomputer. At the time an element resistance is detected, a bias instruction signal Vr from the microcomputer is converted by a D/A converter 21 to an analog signal Vb. An output voltage Vc obtained by removing high frequency components from the analog signal Vb through an LPF 22 is input to a bias control circuit 40. During this time period in which the element resistance is detected, an accurate A/F signal is not output. Therefore, the A/F signal that has theretofore prevailed is held by a Sample/Hold circuit 70 to thereby prevent the use of an erroneous A/F signal. Namely, at the time of detecting the element resistance, the detected value of the oxygen concentration is prevented from becoming abnormal. As a result, an accurate A/F control can be executed using the detected element resistance.

6. 发明授权

US06226861B1 Method and apparatus for gas concentration detection and manufacturing method of the apparatus 有权
标题翻译：气体浓度检测方法及装置及其制造方法
公开(公告)号：US06226861B1
公开(公告)日：2001-05-08
申请号：US09370896
申请日：1999-08-10
申请人： Eiichi Kurokawa , Satoshi Hada , Tomoo Kawase , Toshiyuki Suzuki , Satoshi Haseda
发明人： Eiichi Kurokawa , Satoshi Hada , Tomoo Kawase , Toshiyuki Suzuki , Satoshi Haseda
IPC分类号： H05B300
CPC分类号： G01N27/4065 , Y10T29/49004 , Y10T29/49083 , Y10T29/49101
摘要： An A/F sensor generates a current signal corresponding to an air-fuel ratio in response to a voltage applied by a bias control circuit. After a sensor current is received as a voltage signal via a voltage follower, it is outputted to an A/D converter having a predetermined input voltage range, 0 to 5V. A sensor current detection circuit has a plurality of current detection resistors. In order to variably set the resistance value by the sensor current detection circuit, a switch circuit is switched in accordance with the sensor current depending on whether the A/F value to be detected is in the zone near the stoichiometric ratio or in other air-fuel ratio zones.
摘要翻译：响应于由偏置控制电路施加的电压，A / F传感器产生对应于空燃比的电流信号。在通过电压跟随器接收到作为电压信号的传感器电流之后，将其输出到具有0至5V的预定输入电压范围的A / D转换器。传感器电流检测电路具有多个电流检测电阻。为了通过传感器电流检测电路可变地设置电阻值，根据检测的A / F值是否处于接近化学计量比的区域或其他空气 - 电流检测电路中，根据传感器电流切换开关电路，燃料比区。

7. 发明授权

US07955494B2 Gas sensor control apparatus 有权
标题翻译：气体传感器控制装置
公开(公告)号：US07955494B2
公开(公告)日：2011-06-07
申请号：US12212121
申请日：2008-09-17
申请人： Tomoo Kawase , Eiichi Kurokawa , Toshiyuki Suzuki , Takahito Masuko
发明人： Tomoo Kawase , Eiichi Kurokawa , Toshiyuki Suzuki , Takahito Masuko
IPC分类号： G01N27/417
CPC分类号： G01N27/4065
摘要： The gas sensor control apparatus is for controlling a gas sensor including a sensor element having a solid electrolyte layer, and first and second electrodes located on opposite sides of the solid electrolyte layer, the first electrode serving as a gas detecting electrode, the second electrode serving as a reference electrode, the sensor element generating, as a sensor output, a current flowing between the first and second electrodes having a value depending on concentration of a specific gas component contained in a gas under measurement. The gas sensor control apparatus includes a determination function of determining whether or not it is time for the gas sensor to start operation, and a control function of forcibly supplying oxygen from a side of the second electrode to a side of the first electrode on a temporary basis when a determination result of the first function becomes affirmative.
摘要翻译：气体传感器控制装置用于控制包括具有固体电解质层的传感器元件的气体传感器和位于固体电解质层的相对侧的第一和第二电极，用作气体检测电极的第一电极，作为参考电极，传感器元件作为传感器输出产生在第一和第二电极之间流动的电流，其具有取决于测量气体中所含的特定气体成分的浓度的值。气体传感器控制装置具有确定气体传感器是否开始运转的判定功能，以及从第二电极侧向第一电极一侧强制供给氧的控制功能，当第一功能的确定结果变得肯定时的基础。

8. 发明授权

US07671600B2 Gas concentration detection apparatus having function for detecting sensor element activation status 有权
标题翻译：具有检测传感器元件启动状态功能的气体浓度检测装置
公开(公告)号：US07671600B2
公开(公告)日：2010-03-02
申请号：US11907556
申请日：2007-10-15
申请人： Toshiyuki Suzuki , Tomoo Kawase , Eiichi Kurokawa , Yohei Kawaki
发明人： Toshiyuki Suzuki , Tomoo Kawase , Eiichi Kurokawa , Yohei Kawaki
IPC分类号： G01N27/62
CPC分类号： G01N27/407
摘要： A gas concentration detection apparatus includes a series-connected combination of a sensor element and a resistor, with an AC voltage being applied to one of the outer terminals of that combination and with the other outer terminal being held at a fixed potential. A DC voltage signal at a level determined by an oxygen concentration that is detected by the sensor element, and an AC voltage signal at an amplitude determined by sensor element impedance and hence by the sensor element activation status, are extracted from the series-connected combination by respectively separate circuits which apply separately determined amplification factors.
摘要翻译：气体浓度检测装置包括传感器元件和电阻器的串联组合，其中AC电压被施加到该组合的外部端子之一，而另一个外部端子被保持在固定电位。由传感器元件检测到的由氧浓度确定的水平的直流电压信号和由传感器元件阻抗确定的振幅以及因此由传感器元件启动状态确定的交流电压信号从串联连接的组合分别分别应用单独确定的放大因子的电路。

9. 发明授权

US06336354B1 Gas concentration measuring apparatus compensating for error component of output signal 有权
标题翻译：补偿输出信号误差分量的气体浓度测量装置
公开(公告)号：US06336354B1
公开(公告)日：2002-01-08
申请号：US09497179
申请日：2000-02-03
申请人： Toshiyuki Suzuki , Eiichi Kurokawa , Tomoo Kawase , Satoshi Hada
发明人： Toshiyuki Suzuki , Eiichi Kurokawa , Tomoo Kawase , Satoshi Hada
IPC分类号： G01N2712
CPC分类号： G01N27/4067
摘要： A gas concentration measuring apparatus is provided which measures the concentration of a given gas using a gas sensor. The gas sensor includes a sensor element producing a gas concentration signal indicative of the concentration of the gas, a heater heating the sensor element, and an insulator disposed between the sensor element and the heater. The apparatus includes a heater control circuit which may provisionally supply electrical power to the heater by applying a Pulse-Width-Modulated signal. The heater control circuit performs a switching operation to supply power to the heater cyclically. The apparatus corrects an error contained in the gas concentration signal arising from a leakage current flowing into the sensor element through the insulator during the switching operation of the heater control circuit.
摘要翻译：提供一种气体浓度测量装置，其使用气体传感器测量给定气体的浓度。气体传感器包括产生指示气体浓度的气体浓度信号的传感器元件，加热传感器元件的加热器和设置在传感器元件和加热器之间的绝缘体。该装置包括加热器控制电路，该加热器控制电路可通过施加脉冲宽度调制信号临时向加热器供电。加热器控制电路执行切换操作以循环地向加热器供电。该装置在加热器控制电路的切换操作期间，通过绝缘体校正由流入传感器元件的漏电流引起的气体浓度信号中包含的误差。

10. 发明授权

US6164125A Detection of malfunction in gas concentration detection system 失效
标题翻译：气体浓度检测系统故障检测
公开(公告)号：US6164125A
公开(公告)日：2000-12-26
申请号：US55784
申请日：1998-04-07
申请人： Tomoo Kawase , Eiichi Kurokawa , Yukihiro Yamashita , Satoshi Haseda , Toshiyuki Suzuki
发明人： Tomoo Kawase , Eiichi Kurokawa , Yukihiro Yamashita , Satoshi Haseda , Toshiyuki Suzuki
IPC分类号： F02D41/14 , G01N27/417 , G01N33/00 , G01M19/00
CPC分类号： G01N27/4175 , F02D41/1456 , F02D41/1494 , F02D41/1495
摘要： A gas concentration sensor voltage and current (in both heater on and heater off states) are detected and compared with predetermined thresholds, respectively, by a microcomputer. Based on a combination of the comparison results, the presence or absence of trouble in the system is detected and trouble location in the system is specified. In addition or alternatively, the sensor voltage is compared with thresholds to determine whether it is outside of a normal zone. The voltage may be actually detected or calculated. If the voltage is outside the normal zone, sensor voltage is reduced to zero or restricted to a predetermined limit.
摘要翻译：通过微型计算机分别检测气体浓度传感器电压和电流（两者在加热器开启和加热器关闭状态）并与预定阈值进行比较。基于比较结果的组合，检测系统中存在或不存在故障，并指定系统中的故障定位。另外或替代地，将传感器电压与阈值进行比较以确定其是否在正常区域之外。可以实际检测或计算电压。如果电压在正常区域之外，则传感器电压降低到零或限制在预定的极限。

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