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    • 2. 发明授权
    • Air-fuel ratio control system
    • 空气燃料比率控制系统
    • US5209206A
    • 1993-05-11
    • US727855
    • 1991-07-10
    • Yoshiaki DannoTetsurou IshidaYoshiaki Kodama
    • Yoshiaki DannoTetsurou IshidaYoshiaki Kodama
    • F02D41/14G01N27/406
    • F02D41/148F02D41/1488F02D41/1495G01N27/4065F02D41/1456
    • An air-fuel ratio control system compares an air-fuel ratio indicated by air-fuel ratio information from an air-fuel ratio sensor and a target air-fuel ratio determined depending on operating conditions of a motor vehicle which incorporates the air-fuel ratio control system, for reliably determining at least a failure of the air-fuel ratio sensor. When a failure of the air-fuel ratio sensor is detected, an air-fuel ratio feedback control process is stopped or the air-fuel ratio sensor is disabled, preventing the air-fuel ratio from being corrected in error based on an output signal from the air-fuel ratio sensor which has failed. Therefore, the air-fuel ratio control system prevents problems such as poor exhaust gas purification, reduced drivability, and unstable engine idling from taking place.
    • 空燃比控制系统将来自空燃比传感器的由空燃比信息表示的空燃比与根据机动车辆的运转条件确定的目标空燃比进行比较,该机动车辆的空燃比 控制系统,用于可靠地确定空燃比传感器的故障。 当检测到空燃比传感器的故障时,停止空燃比反馈控制处理或禁用空燃比传感器,从而基于来自于空燃比传感器的输出信号来防止空燃比被错误地校正 空燃比传感器失败。 因此,空燃比控制系统防止排气净化不良,驾驶性能降低,发动机怠速不稳定等问题。
    • 3. 发明授权
    • System for feedback-controlling the air-fuel ratio of an air-fuel
mixture to be supplied to an internal combustion engine
    • 用于反馈控制要供应到内燃机的空气燃料混合物的空燃比的系统
    • US5056308A
    • 1991-10-15
    • US470135
    • 1990-01-25
    • Tateo KumeMichiyasu YoshidaYoshiaki KodamaKazuo Koga
    • Tateo KumeMichiyasu YoshidaYoshiaki KodamaKazuo Koga
    • F02D41/14
    • F02D41/1443F02D41/1495F02D2041/1432F02D41/1456
    • A feedback control system for an air-fuel ratio according to the present invention comprises a first oxygen sensor for detecting the oxygen concentration of exhaust gas flowing through a first exhaust pipe of an internal combustion engine, a second oxygen sensor for detecting the oxygen concentration of the exhaust gas passed through an exhaust gas disposer in a common exhaust passage which is connected with both first and second exhaust pipes of the engine, and an electronic control unit for calculating the amount of fuel supply to each cylinder of the engine in accordance with the oxygen concentration of the exhaust gas detected by means of the first oxygen sensor. The electronic control unit contains therein a correction circuit for correcting the amount of fuel supply to that cylinder of the engine which is associated with the second exhaust pipe, in accordance with the oxygen concentration of the exhaust gas detected by means of the second oxygen sensor.
    • 根据本发明的用于空燃比的反馈控制系统包括用于检测流过内燃机的第一排气管的排气的氧浓度的第一氧传感器,用于检测内燃机的第一排气管的氧浓度的第二氧传感器 排气通过与发动机的第一排气管和第二排气管连接的公共排气通道中的废气处理器,以及电子控制单元,用于计算根据该发动机的每个气缸的燃料供给量 通过第一氧传感器检测的废气的氧浓度。 电子控制单元包含校正电路,用于根据通过第二氧传感器检测的排气的氧气浓度来校正与第二排气管相关联的发动机气缸的燃料量。
    • 7. 发明授权
    • Apparatus for controlling air/fuel ratio of internal combustion engine
    • 用于控制内燃机空燃比的装置
    • US5033440A
    • 1991-07-23
    • US544615
    • 1990-06-27
    • Shiro KumagaiYoshiaki KodamaNobuyuki YasudaKatsuyuki Maeda
    • Shiro KumagaiYoshiaki KodamaNobuyuki YasudaKatsuyuki Maeda
    • F02D41/14
    • F02D41/1479F02D41/2438F02D41/2454
    • An apparatus is provided for controlling the air/fuel ratio of an internal combustion engine. The apparatus includes a sensor disposed in an exhaust system for detecting components of exhaust gas, a device for compulsorily changing the air/fuel ratio, another device for setting a first target value which gives a target air/fuel ratio to be compared with each output from the sensor, and a further device for controlling the air/fuel ratio, which has been compulsorily changed by the air/fuel ratio changing device, on the basis of the result of a comparison between the output and the first target value, whereby the average air/fuel ratio may be controlled to the first target air/fuel ratio. The first target value setting device includes an element for modifying the first target value to a second target value, which gives a leaner air/fuel ratio, in a specific operation state of the engine.
    • 提供一种用于控制内燃机的空燃比的装置。 该装置包括设置在排气系统中用于检测排气成分的传感器,用于强制改变空气/燃料比的装置,用于设定第一目标值的装置,其给出与每个输出相比较的目标空气/燃料比 根据输出与第一目标值之间的比较结果,从传感器和另一个用于控制由空气/燃料比变更装置强制改变的空气/燃料比的装置,由此, 可以将平均空燃比控制在第一目标空燃比。 第一目标值设定装置包括用于在发动机的特定操作状态下将第一目标值修正为赋予较冷空气/燃料比的第二目标值的元件。