公开(公告)号：US20050230248A1

公开(公告)日：2005-10-20

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： G01N27/407 ,  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：US06922639B2

公开(公告)日：2005-07-26

申请号：US10678095

申请日：2003-10-06

申请人： Tomoo Kawase ,  Eiichi Kurokawa

发明人： Tomoo Kawase ,  Eiichi Kurokawa

IPC分类号： G01N27/26 ,  G01N27/416 ,  G01N27/419 ,  G06F19/00

CPC分类号： G01N27/419

摘要： A gas concentration detecting apparatus comprises a gas concentration sensor and a gas concentration calculator. The sensor has first to third cells. A gas to be detected is introduced in a chamber and the first cell is responsible for discharging and changing oxygen from and into the chamber. The second cell detects a concentration of a specific gas component of the gas that has passed along the first cell. The third cell detects a concentration of residual oxygen in the gas that remains after discharge of the oxygen through the first cell. The calculator takes in a current acquired from the second cell measured with a voltage applied thereto and calculates the specific gas component concentration based on the current. The calculator includes plural concentration calculating means whose concentration detecting ranges are mutually different in a scale. The specific gas component concentration is calculated every concentration calculating means.

摘要翻译： 气体浓度检测装置包括气体浓度传感器和气体浓度计算器。 传感器具有第一至第三个单元。 要检测的气体被引入腔室中，并且第一电池负责从腔室中排出和更换氧气。 第二电池检测沿着第一电池通过的气体的特定气体成分的浓度。 第三电池检测通过第一电池排出氧气后剩余的气体中的残留氧浓度。 计算器接收用施加电压测量的从第二单元获取的电流，并基于电流计算特定气体成分浓度。 计算器包括浓度检测范围在规模上相互不同的多个浓度计算装置。 每个浓度计算装置计算特定气体组分浓度。

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：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。

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。

公开(公告)号：US07614391B2

公开(公告)日：2009-11-10

申请号：US12104008

申请日：2008-04-16

申请人： Tomoo Kawase ,  Eiichi Kurokawa ,  Katsuhiko Nakabayashi ,  Takahito Masuko ,  Koji Sugiura

发明人： Tomoo Kawase ,  Eiichi Kurokawa ,  Katsuhiko Nakabayashi ,  Takahito Masuko ,  Koji Sugiura

IPC分类号： F02D41/00

CPC分类号： F02D41/222 ,  F02D41/123 ,  F02D41/145 ,  F02D41/1454 ,  F02D41/2441 ,  F02D41/2448 ,  F02D41/2454 ,  F02D41/2474 ,  F02D2041/1422

摘要： A correction apparatus for correcting an output of an oxygen 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 execute a fuel cut operation to bring the pressure in the exhaust pipe to the atmospheric pressure and enters an under-atmosphere correction mode to sample an output of the oxygen sensor and determine a correction factor compensating for a deviation of the sampled output from a reference value representing an actual concentration of oxygen. The apparatus also works to calculate the pressure in the exhaust pipe after start of the fuel cut and determine whether the under-atmosphere correction mode is to be entered or not based on the pressure of exhaust gas, thereby ensuring the accuracy in correcting the output of the oxygen sensor regardless of a variation in the pressure of exhaust gas.

摘要翻译： 一种用于校正安装在内燃机的排气管中的氧传感器的输出的校正装置，以测量废气中所含的氧浓度。 该装置用于执行燃料切断操作以使排气管中的压力达到大气压并进入大气下校正模式以对氧传感器的输出进行采样，并确定补偿采样输出的偏差的校正因子 从表示氧气的实际浓度的参考值。 该装置还用于计算燃料切断开始后的排气管中的压力，并且基于排气的压力来确定是否要进入低于大气压的校正模式，从而确保校正输出的精度 氧传感器，而不管排气压力的变化。

公开(公告)号：US07578914B2

公开(公告)日：2009-08-25

申请号：US11167391

申请日：2005-06-28

申请人： Tomoo Kawase ,  Eiichi Kurokawa

发明人： Tomoo Kawase ,  Eiichi Kurokawa

IPC分类号： G01N27/407

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 determine the concentrations of oxygen at different resolutions within a wide and a narrow range using a first and a second sensor signal which are amplified by first and second operational amplifiers at different amplification factors. The apparatus samples values of the first sensor signal at different concentrations of oxygen to find an output characteristic error of the first operational amplifier and determines an actual concentration of oxygen to calculate an output characteristic error of the second operational amplifier using the one of the first operational amplifier and the actual concentration of oxygen. This permits values of the first and second sensor signals to be corrected so as to compensate for the output characteristics of the first and second operational amplifiers.

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，其被设计成使用第一和第二传感器信号来确定在宽范围和窄范围内的不同分辨率下的氧气浓度，所述第一和第二传感器信号由 第一和第二运算放大器在不同的放大系数。 该装置以不同氧浓度对第一传感器信号的值进行采样，以找出第一运算放大器的输出特性误差，并且确定实际的氧浓度，以使用第一运算放大器中的一个运算放大器计算第二运算放大器的输出特性误差 放大器和氧气的实际浓度。 这允许校正第一和第二传感器信号的值，以补偿第一和第二运算放大器的输出特性。

公开(公告)号：US07445698B2

公开(公告)日：2008-11-04

申请号：US10813442

申请日：2004-03-31

申请人： Satoshi Hada ,  Tomoo Kawase ,  Eiichi Kurokawa

发明人： Satoshi Hada ,  Tomoo Kawase ,  Eiichi Kurokawa

IPC分类号： G01N27/409 ,  G01N27/41

CPC分类号： G01N27/4071

摘要： In a gas concentration detecting apparatus, a voltage is applied to electrodes of a sensor element. A change is caused in either the applied voltage or an element current. An amount of a change in each of a current value and a voltage value caused is measured in response to the caused change. An amount of resistance of the sensor element is calculated based on a ratio between the change amounts in the current value and the voltage value. A detection unit detects abnormality relating to controlling the sensor by utilizing at least one of the change amounts in the current value and the voltage value.

摘要翻译： 在气体浓度检测装置中，向传感器元件的电极施加电压。 在施加的电压或元件电流中引起变化。 响应于引起的变化来测量引起的电流值和电压值中的每一个的变化量。 基于当前值的变化量与电压值之间的比率来计算传感器元件的电阻量。 检测单元通过利用电流值和电压值中的至少一个变化量来检测与传感器的控制有关的异常。

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。