公开(公告)号：US20070007134A1

公开(公告)日：2007-01-11

申请号：US11483608

申请日：2006-07-11

申请人： Tomoo Kawase ,  Eiichi Kurokawa ,  Toru Katafuchi

发明人： Tomoo Kawase ,  Eiichi Kurokawa ,  Toru Katafuchi

IPC分类号： G01N27/26

CPC分类号： F02D41/1494 ,  F02D41/1456 ,  G01N27/4067 ,  G01N27/4175

摘要： A gas concentration measuring system for use in air-fuel ratio control of motor vehicle engines is provided which is designed to determine the concentrations of oxygen as a function of an air-fuel ratio of a mixture supplied to the engine through a sensor element. The sensor element is activated by heat produced by an electric heater. The system works to sample the accumulated amount of energy inputted to the sensor element by the heat produced by the heater to determine whether the sensor element has been activated enough to produce an output representing an actual value of the air-fuel ratio correctly or not. Use of the accumulated amount of energy inputted to the sensor element will result in a decreased time required for such a determination as compared with the impedance of the sensor element.

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系统，其被设计为根据通过传感器元件提供给发动机的混合物的空燃比来确定氧浓度。 传感器元件由电加热器产生的热量激活。 该系统用于通过由加热器产生的热量来采样输入到传感器元件的能量的累积量，以确定传感器元件是否已经被足够的激活，以正确地产生表示空燃比的实际值的输出。 使用输入到传感器元件的累积能量将导致与传感器元件的阻抗相比所需的这种确定所需的时间减少。

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：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.

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。

公开(公告)号：US07980121B2

公开(公告)日：2011-07-19

申请号：US12203398

申请日：2008-09-03

申请人： Mikiyasu Matsuoka ,  Tomoo Kawase ,  Eiichi Kurokawa

发明人： Mikiyasu Matsuoka ,  Tomoo Kawase ,  Eiichi Kurokawa

IPC分类号： G01M15/10

CPC分类号： G01N33/0037 ,  F02D41/1454 ,  F02D41/1474 ,  F02D41/1495 ,  F02D41/222 ,  F02D41/2474 ,  Y02A50/245

摘要： The degradation simulator is used for a gas sensor including a sensor element having a solid electrolyte layer and a pair of electrodes located opposite to each other across from the solid electrolyte layer, the sensor element outputting a sensor output signal having a value depending on concentration of a specific gas in the ambient gas. The degradation simulator includes a first setting function of enabling variably setting a time constant delay which appears on the sensor output signal when concentration of the specific gas changes, a second setting function of enabling variably setting a dead time delay which appears on the sensor output signal when concentration of the specific gas changes, and an adding function of adding at least one of the time constant delay and dead time delay to the sensor output signal in order to generate a pseudo-degraded sensor output signal in accordance with an external instruction.

摘要翻译： 降解模拟器用于气体传感器，其包括具有固体电解质层的传感器元件和在固体电解质层之间彼此相对定位的一对电极，传感器元件输出具有取决于浓度的值的传感器输出信号 环境气体中的特定气体。 降级模拟器包括第一设置功能，其能够可变地设置当特定气体的浓度改变时出现在传感器输出信号上的时间常数延迟，允许可变地设置出现在传感器输出信号上的死区延迟的第二设置功能 当特定气体的浓度变化时，以及将至少一个时间常数延迟和死区时间延迟添加到传感器输出信号中的加法功能，以便根据外部指令产生伪劣化的传感器输出信号。

公开(公告)号：US07582197B2

公开(公告)日：2009-09-01

申请号：US11091916

申请日：2005-03-29

申请人： Tomoo Kawase ,  Eiichi Kurokawa

发明人： Tomoo Kawase ,  Eiichi Kurokawa

IPC分类号： G01N27/26

CPC分类号： F02D41/1495 ,  F02D41/1455 ,  G01N27/4175 ,  G01N33/007

摘要： A gas concentration measuring apparatus for use in air-fuel ratio control of motor vehicle engines is provided which is designed to detect and identify a cause of failure in operation of an A/F sensor. The apparatus works to apply the voltage to a sensor element and sweep it to produce a change in electrical current flowing through the sensor element for measuring the impedance of the sensor element. The apparatus samples values of the change in the current, a sensor output indicating an air-fuel ratio of mixture supplied to the engine, etc., before and/or after the sensor element is activated and uses a combination thereof to identify the cause of the failure of the A/F sensor.

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，其被设计用于检测和识别A / F传感器的操作失败的原因。 该装置用于将电压施加到传感器元件并将其扫过以产生流过传感器元件的电流变化，以测量传感器元件的阻抗。 该装置在传感器元件被激活之前和/或之后采样电流变化的值，传感器输出，指示供应给发动机的混合物的空气 - 燃料比等，并且使用其组合来识别 A / F传感器的故障。