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    • 2. 发明授权
    • Air-fuel ratio control system for internal combustion engine
    • 内燃机空燃比控制系统
    • US5730111A
    • 1998-03-24
    • US664840
    • 1996-06-17
    • Yasumasa KajiYoshiyuki OkamotoHisashi Iida
    • Yasumasa KajiYoshiyuki OkamotoHisashi Iida
    • F02D45/00F02D41/00F02D41/14F02D41/34
    • F02D41/008F02D41/1441F02D41/1474F02D41/1456
    • An air-fuel ratio control system for an internal combustion engine includes an air-fuel ratio sensor provided at a collecting portion of an exhaust manifold. The air-fuel ratio sensor monitors an exhaust gas and changes its output in a linear fashion relative to an air-fuel ratio represented by the exhaust gas. The air-fuel ratio sensor is arranged at a position such that, after the number of strokes, corresponding to a multiple of the number of all cylinders, from a fuel injection for each cylinder, the air-fuel ratio sensor can measure an air-fuel ratio caused by the corresponding fuel injection. The system stores a target fuel amount for each of the cylinders. The system derives a feedback correction value depending on a deviation between a fuel amount introduced into the corresponding cylinder, which is derived based on the air-fuel ratio monitored by the air-fuel ratio sensor, and the stored number-of-stroke prior target fuel amount.
    • 用于内燃机的空燃比控制系统包括设置在排气歧管的收集部分处的空燃比传感器。 空燃比传感器监测排气并相对于由废气表示的空燃比以线性方式改变其输出。 空燃比传感器配置在这样的位置,使得在从每个气缸的燃料喷射开始的行程次数对应于所有气缸数的倍数之后,空燃比传感器可以测量空气 - 由相应的燃料喷射引起的燃料比。 系统存储每个气缸的目标燃料量。 该系统根据由空燃比传感器监视的空燃比导出的相应气缸中引入的燃料量与存储的行程数之前目标值之间的偏差,得出反馈校正值 燃料量。
    • 4. 发明授权
    • Method and apparatus for controlling air-fuel ratio in internal
combustion engines
    • 用于控制内燃机空燃比的方法和装置
    • US4517948A
    • 1985-05-21
    • US515788
    • 1983-07-21
    • Yasumasa KajiShigenori IsomuraTakashi HaradaShuji Sakakibara
    • Yasumasa KajiShigenori IsomuraTakashi HaradaShuji Sakakibara
    • F02D41/34F02B75/02F02D41/14F02D41/24F02D45/00F02M17/00
    • F02D41/2454F02D41/2487F02B2075/027
    • An apparatus for controlling an air-fuel ratio in internal combustion engines has an RPM sensor, a combustion composition sensor, an intake air sensor and so on. Detection signals from these sensors are fetched by a microprocessor. A RAM is arranged in the microprocessor and is continuously supplied with power. The RAM has a first memory area which is divided into a plurality of areas for storing correction data corresponding to operating states of the engine. All the correction data stored in the first memory area are added together and the sum is divided by a given constant so as to obtain an updated correction amount. This updated correction amount is stored in a second memory area. The updated correction amount in the second memory area reflects the correction data stored in the first memory area. Given correction data stored in the first memory area is read out corresponding to a given intake air flow, thereby enabling feedback control.
    • 用于控制内燃机中的空燃比的装置具有RPM传感器,燃烧成分传感器,进气传感器等。 来自这些传感器的检测信号由微处理器取出。 在微处理器中布置RAM并且连续地供电。 RAM具有第一存储区域,其被划分为用于存储与发动机的操作状态相对应的校正数据的多个区域。 将存储在第一存储区域中的所有校正数据相加在一起,并且将总和除以给定常数,以获得更新的校正量。 该更新校正量存储在第二存储区域中。 第二存储区域中更新的校正量反映存储在第一存储区域中的校正数据。 根据给定的进气流量,读出存储在第一存储区域中的校正数据,从而实现反馈控制。
    • 5. 发明授权
    • Closed loop air/fuel ratio control using learning data each arranged not
to exceed a predetermined value
    • 使用不超过预定值的学习数据的闭环空燃比控制
    • US4461261A
    • 1984-07-24
    • US377542
    • 1982-05-12
    • Shigenori IsomuraToshio KondoYasumasa KajiAkio Kobayashi
    • Shigenori IsomuraToshio KondoYasumasa KajiAkio Kobayashi
    • F02D41/34F02B75/02F02D41/14F02D41/26F02D5/00
    • F02D41/26F02D41/2454F02D41/2483F02B2075/027
    • In a closed loop control system for air/fuel ratio control of an internal combustion engine, an integration correction factor is derived from the output signal of a gas sensor indicative of the concentration of an exhaust gas component, and an engine condition correction factor is selected from a memory in which a plurality of engine condition correction factors are prestored in the form of a table. The engine condition correction factor is renewed in accordance with the variation in the value of the integration correction factor so as to perform learning control. In order to prevent each of the engine condition correction factors from assuming an undesirable value which are far deviated from its standard, a constant or variable limit value is set. The limit value may be set by calculating some typical engine condition correction factors. The correction factors will be used to modify a basic quantity of fuel to be injected into each cylinder of the engine for feedback controlling the air/fuel ratio of the air/fuel mixture.
    • 在用于内燃机的空气/燃料比控制的闭环控制系统中,从表示排气组分浓度的气体传感器的输出信号导出积分校正因子,并且选择发动机状态校正系数 从其中以表的形式预先存储多个发动机状态校正系数的存储器。 根据积分校正因子的值的变化来更新发动机状态校正系数,以进行学习控制。 为了防止每个发动机状态校正因子假设远离其标准的不期望值,设定常数或可变极限值。 极限值可以通过计算一些典型的发动机状态校正因子来设定。 校正因子将用于改变要喷射到发动机的每个气缸中的基本燃料量,以反馈控制空气/燃料混合物的空气/燃料比。
    • 6. 发明授权
    • Deterioration monitoring apparatus for an exhaust system of an internal
combustion engine
    • 内燃机排气系统劣化监测装置
    • US5806306A
    • 1998-09-15
    • US663720
    • 1996-06-14
    • Yoshiyuki OkamotoYasumasa KajiHisashi Iida
    • Yoshiyuki OkamotoYasumasa KajiHisashi Iida
    • F02D45/00F01N3/20F01N11/00F02D41/14
    • F01N11/007F02D41/1495F01N2550/02F02D41/1456Y02T10/47
    • A deterioration monitoring apparatus for an exhaust system of an internal combustion engine includes an air-fuel ratio control system and a deterioration determining circuit. The air-fuel ratio control system controls an air-fuel ratio of exhaust emissions flowing downstream of a catalytic converter disposed in the exhaust system of the engine to agree with a target downstream air-fuel ratio under feedback control based on an air-fuel ratio of exhaust emissions flowing upstream of the catalytic converter and the air-fuel ratio of the exhaust emissions flowing downstream of the catalytic converter. The deterioration determining circuit determines whether the exhaust system such as an oxygen sensor mounted downstream of the catalytic converter or the catalytic converter is deteriorated or not based on the air-fuel ratio of the exhaust emissions flowing downstream of the catalytic converter and the target downstream air-fuel ratio.
    • 内燃机排气系统的劣化监测装置包括空燃比控制系统和劣化判定电路。 空燃比控制系统控制在设置在发动机的排气系统中的催化转化器下游流动的废气排放的空燃比,以符合基于空燃比的反馈控制下的目标下游空燃比 在催化转化器上游流动的废气排放物和在催化转化器下游流动的废气排放物的空燃比。 恶化判定电路基于在催化转化器下游排出的排气排放物和目标下游空气的空燃比,判定安装在催化转化器或催化转化器下游的氧传感器等排气系统是否劣化 - 燃料比。
    • 7. 发明授权
    • Water temperature sensor failure detecting device for idle speed control
system
    • 水温传感器故障检测装置怠速控制系统
    • US5694897A
    • 1997-12-09
    • US780154
    • 1996-12-26
    • Yasumasa Kaji
    • Yasumasa Kaji
    • F02D45/00F01P7/16F01P11/14F02D31/00F02D41/22F02D41/08
    • F02D41/222F01P11/14F02D31/003F01P2031/00F01P2031/32F01P7/16F02D2041/227Y02T10/40Y02T10/42
    • To provide a water temperature sensor failure detecting device for an idle speed control system of an internal combustion engine which eliminates the need for a bimetallic guard mechanism, an aperture characteristic of an idle control valve (ISCV) when normal becomes a larger degree of opening as coolant water temperature drops, and bypass airflow supplied to an engine is increased. During failure of a water temperature sensor, a duty value for driving the ISCV is set at 50%, the ISCV is opened substantially halfway, and the bypass airflow supplied to the engine is caused to be a neutral flow. In this way, by causing the bypass airflow during failure of the water temperature sensor to be a neutral flow, a worst state of overrun, engine stall and the like can be prevented, and startability when at low temperature and operability after engine warmup can be ensured.
    • 为了提供一种不需要双金属防护机构的内燃机的怠速控制系统的水温传感器故障检测装置,当正常变为更大程度的打开时,空转控制阀(ISCV)的孔径特性 冷却水温度下降,提供给发动机的旁路气流增加。 在水温传感器故障期间,用于驱动ISCV的占空比值设定为50%,ISCV大致中途打开,并且供给到发动机的旁路气流成为中性流。 这样,通过使水温传感器故障时的旁路气流为中性流,可以防止最差的溢出状态,发动机失速等,并且在低温时的启动能力以及发动机预热后的可操作性可以是 确保。