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：US20060011476A1

公开(公告)日：2006-01-19

申请号：US11181854

申请日：2005-07-15

申请人： Satoshi Hada ,  Mitsunobu Niwa ,  Toshiyuki Suzuki ,  Eiichi Kurokawa

发明人： Satoshi Hada ,  Mitsunobu Niwa ,  Toshiyuki Suzuki ,  Eiichi Kurokawa

IPC分类号： G01N27/26

CPC分类号： G01N27/4065

摘要： A gas concentration measuring apparatus is provided which works to measure the concentration of a gas using a gas sensor element. The apparatus also works to determine the impedance of the gas sensor element through an arithmetic circuit for use in controlling the activation or diagnosis of the gas sensor element. The arithmetic circuit uses a command signal from a sensor controller to determine a sampling time at which a change in voltage applied to the sensor element or current flowing therethrough that is a function of the impedance of the sensor element is to be sampled. This permits the impedance to be calculated accurately in a simplified manner without use of a resource such as a timer.

摘要翻译： 提供了一种气体浓度测量装置，其用于使用气体传感器元件测量气体的浓度。 该装置还用于通过用于控制气体传感器元件的激活或诊断的运算电路来确定气体传感器元件的阻抗。 算术电路使用来自传感器控制器的命令信号来确定施加到传感器元件的电压的变化或流过其中的电流是传感器元件的阻抗的函数的采样时间。 这允许以简化的方式精确地计算阻抗，而不使用例如定时器的资源。

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：US20050029250A1

公开(公告)日：2005-02-10

申请号：US10913382

申请日：2004-08-09

申请人： Mitsunobu Niwa ,  Eiichi Kurokawa ,  Satoshi Hada

发明人： Mitsunobu Niwa ,  Eiichi Kurokawa ,  Satoshi Hada

IPC分类号： G01N27/41 ,  F02D41/14 ,  F02D45/00 ,  G01N27/406 ,  G01N27/416 ,  H05B1/02

CPC分类号： H05B1/0236 ,  F02D41/1494 ,  G01N27/4067

摘要： A heater controller designed to control the thermal energy produced by a heater under feedback control for heating a body of a gas sensor up to a desired activated temperature. The heater controller works to determine a feedback gain such a proportional or an integral gain as a function of a deviation of the temperature of the gas sensor from a target one and change it based on a condition in which the temperature of the gas sensor is changing from the target value. This ensures the stability of control of the temperature of the gas sensor regardless of a disturbance such as a change in ambient temperature and keeps the accuracy of gas measurement at a higher level.

摘要翻译： 加热器控制器，其设计用于控制加热器在反馈控制下产生的热能，以将气体传感器的主体加热到所需的活化温度。 加热器控制器用于确定作为气体传感器的温度与目标温度的偏差的函数的比例或积分增益的反馈增益，并且基于气体传感器的温度变化的条件来改变 从目标值。 这确保了气体传感器的温度的稳定性，而不管诸如环境温度的变化的干扰，并且将气体测量的精度保持在更高的水平。

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：US6067841A

公开(公告)日：2000-05-30

申请号：US64784

申请日：1998-04-23

申请人： Toshiyuki Suzuki ,  Eiichi Kurokawa ,  Satoshi Hada ,  Satoshi Haseda ,  Norio Suzuki

发明人： Toshiyuki Suzuki ,  Eiichi Kurokawa ,  Satoshi Hada ,  Satoshi Haseda ,  Norio Suzuki

IPC分类号： G01N27/41 ,  F02D41/00 ,  F02D41/06 ,  F02D41/14 ,  F02D41/34 ,  G01N27/12 ,  G01N27/406 ,  G01N27/416 ,  G01N27/419 ,  G01N33/00 ,  G01N7/00 ,  G01L3/26 ,  G01N27/26

CPC分类号： G01N27/4067 ,  F02D41/068 ,  F02D41/1455 ,  F02D41/1456 ,  F02D41/1496 ,  F02D41/008

摘要： A method that detects an air-fuel ratio in each cylinder of an internal combustion engine by properly setting a cycle of detecting an element resistance of an A/F oxygen concentration sensor. Although an actual A/F signal is at the stoichiometric ratio in each cylinder at exhaust timing cycle in a practical engine rotational speed range, the ratio is largely deviated to the rich side in the #1 cylinder. The first element resistance detection timing cycle coincides with generation timing of the actual A/F signal, so that the A/F signal cannot be detected. When the element resistance detection timing cycle is preset so as to be longer than the exhaust timing cycle, the second actual A/F signal detection timing for the #1 cylinder does not coincide with the element resistance detection timing. Consequently, the actual A/F signal of the #1 cylinder can be detected as an A/F signal by the A/F sensor.

摘要翻译： 通过适当地设定检测A / F氧浓度传感器的元件电阻的周期来检测内燃机的各气缸的空燃比的方法。 虽然实际的A / F信号在实际的发动机转速范围内在排气定时周期处于每个气缸中的化学计量比，但该比率在很大程度上偏离＃1气缸中的浓侧。 第一元件电阻检测定时周期与实际A / F信号的产生定时一致，从而不能检测到A / F信号。 当元件电阻检测定时周期被预设为比排气定时周期长时，＃1气缸的第二实际A / F信号检测定时与元件电阻检测定时不一致。 因此，可以通过A / F传感器将＃1气缸的实际A / F信号检测为A / F信号。