公开(公告)号：US06478940B1

公开(公告)日：2002-11-12

申请号：US09383383

申请日：1999-08-26

申请人： Toshiyuki Suzuki ,  Eiichi Kurokawa ,  Satoshi Hada ,  Tomoo Kawase

发明人： Toshiyuki Suzuki ,  Eiichi Kurokawa ,  Satoshi Hada ,  Tomoo Kawase

IPC分类号： G01N2741

CPC分类号： G01N27/4065

摘要： A limit-current type A/F sensor produces element current responsive to oxygen concentration in the exhaust gas when a voltage is applied to its sensor element portion. An application voltage control circuit comprises an operational amplifier and resistors. An output of the control circuit is applied to one terminal of the A/F sensor via a driver circuit. The other terminal of the A/F sensor is connected to an output terminal of an operational amplifier via a current-detecting resistor. The element current value, detected by the current-detecting resistor, is returned to the application voltage control circuit via a buffer. In the application voltage control circuit, adjustment of the gain is performed in such a manner that the inclination of the application voltage line on the V-I coordinate becomes larger than the inclination equivalent to the A.C. impedance of the sensor element in the sensor activated condition.

摘要翻译： 当电压施加到其传感器元件部分时，极限电流型A / F传感器产生响应于排气中的氧浓度的元件电流。 施加电压控制电路包括运算放大器和电阻器。 控制电路的输出通过驱动电路施加到A / F传感器的一个端子。 A / F传感器的另一个端子通过电流检测电阻连接到运算放大器的输出端。 由电流检测电阻检测的元件电流值通过缓冲器返回到施加电压控制电路。 在施加电压控制电路中，以使得V-I坐标上的施加电压线的倾斜度大于传感器激活状态下传感器元件的交流阻抗等于倾斜度的方式进行增益调整。

公开(公告)号：US06383354B1

公开(公告)日：2002-05-07

申请号：US09394030

申请日：1999-09-13

申请人： Eiichi Kurokawa ,  Tomoo Kawase ,  Satoshi Hada ,  Toshiyuki Suzuki

发明人： Eiichi Kurokawa ,  Tomoo Kawase ,  Satoshi Hada ,  Toshiyuki Suzuki

IPC分类号： G01N27407

CPC分类号： G01N27/4074

摘要： A gas concentration sensing apparatus includes a gas introducing portion for introducing a measurement gas. A first cell opposed to the gas introduction portion operates for pumping oxygen from the measurement gas in the gas introducing portion. A second cell opposed to the gas introducing portion operates for sensing a concentration in a specific component of the measurement gas from which oxygen has been pumped by the first cell. There is a reference gas chamber to which at least one of the first cell and the second cell is exposed. The one of the first cell and the second cell which is exposed to the reference gas chamber includes an electrode facing the gas introducing portion. A current flowing through the first cell is sensed. A voltage is applied to the first cell in response to the sensed current through the first cell. A current flowing through the second cell is sensed. A voltage is applied to the second cell in response to the sensed current through the second cell. A voltage at the electrode is floated from a voltage of 0 V.

摘要翻译： 气体浓度检测装置包括用于导入测量气体的气体导入部。 与气体引入部相对的第一电池用于从气体导入部中的测量气体中泵送氧气。 与气体导入部相对的第二电池用于感测由第一电池泵送氧气的测定气体的特定成分中的浓度。 存在第一电池和第二电池中的至少一个被暴露的参考气室。 暴露于参考气室的第一电池和第二电池中的一个包括面对气体导入部分的电极。 感测流过第一单元的电流。 响应于通过第一单元的感测电流，向第一单元施加电压。 感测流经第二单元的电流。 响应于通过第二单元的感测电流，向第二单元施加电压。 电极上的电压从0V的电压浮起。

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。

公开(公告)号：US07776194B2

公开(公告)日：2010-08-17

申请号：US11098500

申请日：2005-04-05

申请人： Tomoo Kawase ,  Eiichi Kurokawa ,  Koji Jono

发明人： Tomoo Kawase ,  Eiichi Kurokawa ,  Koji Jono

IPC分类号： G01N27/26

CPC分类号： G01N27/4175

摘要： A gas concentration measuring apparatus for use in air-fuel ratio control of motor vehicle engines is provided which is designed to select or determine a correction factor for an output of an A/F sensor, as produced through a sensor control circuit, for compensating for errors in circuit characteristics of the A/F sensor and/or the sensor control circuit to ensure the accuracy of measurement in the apparatus.

摘要翻译： 提供一种用于机动车辆发动机的空燃比控制的气体浓度测量装置，其被设计成选择或确定通过传感器控制电路产生的A / F传感器的输出的校正因子，以补偿 A / F传感器和/或传感器控制电路的电路特性误差，以确保设备中的测量精度。

公开(公告)号：US07606654B2

公开(公告)日：2009-10-20

申请号：US12104027

申请日：2008-04-16

申请人： Tomoo Kawase ,  Eiichi Kurokawa ,  Takahito Masuko

发明人： Tomoo Kawase ,  Eiichi Kurokawa ,  Takahito Masuko

IPC分类号： F02D41/14

CPC分类号： F01N9/00 ,  F02D41/123 ,  F02D41/1448 ,  F02D41/1455 ,  F02D41/18 ,  F02D41/2454 ,  F02D41/2474 ,  Y02T10/47

摘要： A correction apparatus for correcting an error in an output of an oxygen sensor such as an A/F sensor installed in an exhaust pipe of an internal combustion engine to measure the concentration of oxygen contained in exhaust gas. The apparatus works to determine a given parameter correlating with an actual concentration of oxygen within the exhaust pipe after start of a fuel cut event and also determine an oxygen concentration-corresponding output based on the given parameter which is a parameter corresponding to an output of the oxygen sensor considered to represent the actual concentration of oxygen correctly. The apparatus samples an output of the oxygen sensor during the fuel cut event and determines a correction factor based on the sampled output of the oxygen sensor and the oxygen concentration-corresponding output for use in correcting an output of the oxygen sensor when the engine is undergoing no fuel cut.

摘要翻译： 一种用于校正安装在内燃机的排气管中的A / F传感器等氧传感器的输出的误差的校正装置，以测量废气中所含的氧浓度。 该装置用于确定在开始燃料切断事件之后与排气管内的氧气的实际浓度相关联的给定参数，并且还基于给定参数确定氧浓度对应的输出，所述给定参数是对应于 氧气传感器被认为是正确表示氧气的实际浓度。 该装置在燃料切断事件期间对氧传感器的输出进行采样，并根据氧传感器的采样输出和氧浓度相应的输出确定校正因子，用于在发动机正在进行时校正氧传感器的输出 没有燃料切断

公开(公告)号：US20080185289A1

公开(公告)日：2008-08-07

申请号：US12010682

申请日：2008-01-29

申请人： Mikiyasu Matsuoka ,  Tomoo Kawase ,  Eiichi Kurokawa

发明人： Mikiyasu Matsuoka ,  Tomoo Kawase ,  Eiichi Kurokawa

IPC分类号： G01N27/26

CPC分类号： G01N27/4065

摘要： A current detection resistance in a sensor control device is connected to a sensor element. The current flowing in the sensor element is detected through the current detection resistance. The current detection resistance is connected to an inverting amplification circuit for outputting an air/fuel output voltage to be transferred to a microcomputer. An offset setting circuit is connected to one input terminal of an operational amplifier in the inverting amplification circuit. The offset setting circuit is comprised of a switching element, a resistance connected in series to the switching element, and two dividing voltage resistances whose common node is connected to the resistance. The offset setting circuit generates and gives an offset to the A/F output voltage. The switching element is turned ON and OFF based on an offset switching signal transferred from the microcomputer.

摘要翻译： 传感器控制装置中的电流检测电阻连接到传感器元件。 通过电流检测电阻检测流过传感器元件的电流。 电流检测电阻连接到用于输出要传送到微计算机的空气/燃料输出电压的反相放大电路。 偏移设置电路连接到反相放大电路中的运算放大器的一个输入端。 偏移设定电路由开关元件，与开关元件串联连接的电阻以及共同节点连接到电阻的两个分压电阻构成。 偏移设置电路产生A / F输出电压的偏移量。 基于从微计算机传送的偏移切换信号，开关元件被接通和断开。

公开(公告)号：US20070215470A1

公开(公告)日：2007-09-20

申请号：US11715394

申请日：2007-03-08

申请人： Tomoo Kawase ,  Mitsunobu Niwa ,  Toshiyuki Suzuki ,  Satoshi Hada

发明人： Tomoo Kawase ,  Mitsunobu Niwa ,  Toshiyuki Suzuki ,  Satoshi Hada

IPC分类号： G01N27/26

CPC分类号： G01N27/4065

摘要： A gas concentration measuring apparatus is provided which may be employed in measuring the concentration of oxygen contained in exhaust emissions of automotive engines. The apparatus includes a gas sensor equipped with a solid electrolyte body and a pair of electrodes affixed to opposed surfaces of the solid electrolyte body. The apparatus includes an applied voltage controller which works to apply the voltage to the electrodes of the gas sensor to create an electric current as a function of a concentration of gas to be measured. The applied voltage controller is designed to have an enhanced gain of the voltage to the value of the current, as produced by the gas sensor, in a predetermined frequency band, thereby increasing the response of the gas sensor without inducing the oscillation of the voltage to be applied to the gas sensor.

摘要翻译： 提供一种气体浓度测量装置，其可用于测量汽车发动机废气排放中所含的氧浓度。 该装置包括配备有固体电解质体和固定在固体电解质体的相对表面上的一对电极的气体传感器。 该装置包括施加的电压控制器，其工作以将电压施加到气体传感器的电极，以产生作为待测量气体的浓度的函数的电流。 所施加的电压控制器被设计成在预定频带中将电压的增益提高到由气体传感器产生的电流值，从而增加气体传感器的响应而不引起电压的振荡 应用于气体传感器。

公开(公告)号：US07180596B2

公开(公告)日：2007-02-20

申请号：US10660628

申请日：2003-09-12

申请人： Hiroshi Haraguchi ,  Tomoo Kawase ,  Daisuke Kojima

发明人： Hiroshi Haraguchi ,  Tomoo Kawase ,  Daisuke Kojima

IPC分类号： G01N21/61

CPC分类号： G01N27/419

摘要： A gas concentration detector prevents deviation in output due to a difference in oxygen reactivity between electrode materials to accurately detect a specific gas component in a gas to be measured, such as NOx in an exhaust gas. A sensor element in an NOx sensor has a pump cell in a first chamber and a sensor cell for decomposing NOx and any remaining oxygen and a monitor cell for decomposing only remaining oxygen in a second chamber. An NOx concentration is detected based on a difference in current output between the sensor cell and the monitor cell. Since the sensor cell and the monitor cell have different oxygen reactivities, an output of the monitor cell is smoothed through a band-pass filter or the like so that output responses of the sensor cell and the monitor cell are made to substantially match each other, thereby eliminating any deviation in output.

摘要翻译： 气体浓度检测器防止由于电极材料之间的氧反应性的差异而导致的输出偏差，以精确地检测待测气体中的特定气体成分，例如废气中的NOx。 NOx传感器中的传感器元件具有第一室中的泵室和用于分解NOx和任何剩余氧的传感器单元，以及用于仅在第二室中分解剩余氧的监测单元。 基于传感器单元和监视器单元之间的电流输出的差异来检测NOx浓度。 由于传感器单元和监视器单元具有不同的氧反应性，所以通过带通滤波器等对监视单元的输出进行平滑化，使得传感器单元和监视单元的输出响应基本上彼此匹配， 从而消除任何输出偏差。

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。

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.