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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

US06849174B2 Gas concentration measuring apparatus designed to minimize error component contained in output 失效
标题翻译：气体浓度测量装置设计用于最小化输出中包含的误差分量
公开(公告)号：US06849174B2
公开(公告)日：2005-02-01
申请号：US10373289
申请日：2003-02-26
申请人： Satoshi Hada , Eiichi Kurokawa , Tomoo Kawase , Toshiyuki Suzuki , Satoshi Haseda
发明人： Satoshi Hada , Eiichi Kurokawa , Tomoo Kawase , Toshiyuki Suzuki , Satoshi Haseda
IPC分类号： G01N27/41 , G01N27/00 , G01N27/26 , G01N27/407 , G01N27/416 , G01N27/417 , G01N27/419
CPC分类号： G01N27/4067
摘要： A gas concentration measuring apparatus which has a gas sensor designed to measure, for example, the concentrations of O2 and HOx contained in exhaust emissions of an automotive engine is provided. The apparatus includes a signal processing circuit which converts a current signal outputted from the gas sensor as a function of the concentration of either of O2 and NOx into a voltage signal. The gas sensor and the signal processing circuit are connected electrically through a conductor. The conductor has a length which is determined as a function of a level of the current signal outputted from the gas sensor. The weaker the level of the current signal is, the shorter the length of the conductor. This minimizes addition of electrical noises to the current signal outputted from the gas sensor.
摘要翻译：提供了一种气体浓度测量装置，其具有设计用于测量例如汽车发动机的废气排放中所含的O 2和HO x的浓度的气体传感器。该装置包括信号处理电路，其将从气体传感器输出的电流信号作为O2和NOx中的任一个的浓度变换为电压信号。气体传感器和信号处理电路通过导体电连接。导体具有根据从气体传感器输出的电流信号的电平确定的长度。电流信号的电平越弱，导体长度越短。这最小化了从气体传感器输出的电流信号中增加电噪声。

8. 发明授权

US06547955B1 Gas concentration measuring apparatus designed to minimize error component contained in output 失效
公开(公告)号：US06547955B1
公开(公告)日：2003-04-15
申请号：US09453518
申请日：1999-12-03
申请人： Satoshi Hada , Eiichi Kurokawa , Tomoo Kawase , Toshiyuki Suzuki , Satoshi Haseda
发明人： Satoshi Hada , Eiichi Kurokawa , Tomoo Kawase , Toshiyuki Suzuki , Satoshi Haseda
IPC分类号： G01N27407
CPC分类号： G01N27/4067
摘要： A gas concentration measuring apparatus which has a gas sensor designed to measure, for example, the concentrations of O2 and HOx contained in exhaust emissions of an automotive engine is provided. The apparatus includes a signal processing circuit which converts a current signal outputted from the gas sensor as a function of the concentration of either of O2 and HOx into a voltage signal. The gas sensor and the signal processing circuit are connected electrically through a conductor. The conductor has a length which is determined as a function of a level of the current signal outputted from the gas sensor. The weaker the level of the current signal is, the shorter the length of the conductor. This minimizes addition of electrical noises to the current signal outputted from the gas sensor.

9. 发明授权

US06453724B1 Gas concentration sensing apparatus 有权
标题翻译：气体浓度检测装置
公开(公告)号：US06453724B1
公开(公告)日：2002-09-24
申请号：US09399949
申请日：1999-09-20
申请人： Tomoo Kawase , Eiichi Kurokawa , Satoshi Hada , Toshiyuki Suzuki
发明人： Tomoo Kawase , Eiichi Kurokawa , Satoshi Hada , Toshiyuki Suzuki
IPC分类号： G01N700
CPC分类号： G01N27/4067 , G01N33/0037 , Y02A50/245
摘要： A gas concentration sensor comprises a pump cell for detecting an oxygen concentration in an exhaust gas and a sensor cell for detecting a NOx concentration in the exhaust gas. A porous diffusive layer is interposed between these cells. Furthermore, the sensor comprises a heater for heating these cells. A control circuit produces a sensor cell voltage having an A.C. component to detect the impedance of sensor cell. The electric power supplied to the heater is controlled based on a detected impedance value of the sensor cell.
摘要翻译：气体浓度传感器包括用于检测排气中的氧浓度的泵室和用于检测废气中的NOx浓度的传感器单元。这些细胞之间插入多孔扩散层。此外，传感器包括用于加热这些电池的加热器。控制电路产生具有交流分量的传感器电池电压，以检测传感器单元的阻抗。基于检测到的传感器单元的阻抗值来控制提供给加热器的电力。

10. 发明授权

US08052863B2 Gas sensor control apparatus designed to ensure accuracy of measurement in gas sensor 有权
标题翻译：设计用于确保气体传感器测量精度的气体传感器控制装置
公开(公告)号：US08052863B2
公开(公告)日：2011-11-08
申请号：US12034078
申请日：2008-02-20
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： G01N27/417
CPC分类号： G01N27/4175
摘要： The gas sensor control apparatus develops a first voltage based on a first reference voltage at a negative terminal of a gas sensor device through a resistor and a second voltage based on a second reference voltage at a positive terminal of the gas sensor device. A controller samples through the resistor a sensor current, as created upon the development of the first and second voltage for measuring the concentration of gas. When the impedance of the gas sensor device is measured, the controller alternates the first voltage across the first reference voltage. The value (i.e., a zero-point) of the voltage applied to the gas sensor device when the sensor current is zero (i.e., 0 mA) depends upon the first and second reference voltages. The zero-point is corrected by regulating the second reference voltage to match an applying voltage characteristic to the gas sensor device correctly.
摘要翻译：气体传感器控制装置通过电阻器在气体传感器装置的负极端子处基于第一参考电压产生第一电压，并且在气体传感器装置的正端处基于第二参考电压产生第二电压。控制器通过电阻器对传感器电流进行采样，这是根据开发用于测量气体浓度的第一和第二电压产生的。当测量气体传感器装置的阻抗时，控制器交替跨越第一参考电压的第一电压。当传感器电流为零（即0mA）时施加到气体传感器装置的电压的值（即，零点）取决于第一和第二参考电压。通过调节第二参考电压以正确地对气体传感器装置施加施加电压特性来校正零点。

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