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    • 4. 发明授权
    • Air/fuel ratio control system for internal combustion engine
    • 内燃机空燃比控制系统
    • US06334425B1
    • 2002-01-01
    • US09559742
    • 2000-04-27
    • Shuji NagataniMasahiro SatoMinoru Torii
    • Shuji NagataniMasahiro SatoMinoru Torii
    • F02D4140
    • F02D41/3818F02D41/0065F02D41/1456F02D41/3029F02D2200/0411
    • An air/fuel ratio control system for a direct injection spark ignition internal combustion engine which is operated at an ultra-lean burn combustion or at a pre-mixture charged combustion. In the system, a charging efficiency correction coefficient for adjusting a charging efficiency of intake air is determined based at least on the determined desired air/fuel ratio and the form of combustion, and the desired air/fuel ratio is corrected by the coefficient. Then, the output fuel injection amount is determined based at least on the basic fuel injection amount and the corrected desired air/fuel ratio (desired air/fuel ratio correction coefficient). The charging efficiency correction coefficient is determined to be a less value when the engine is operated at the ultra-lean burn combustion than that when the engine is operated at the pre-mixture charged combustion. The coefficient is made different whether or not the operation of EGR is progress. With this, the desired air/fuel ratio is determined adequately and hence, the fuel injection amount can be determined adequately.
    • 一种用于直喷式火花点火内燃机的空燃比控制系统,其在超稀燃燃烧或预混燃料燃烧下运行。 在该系统中,至少基于所确定的所需空燃比和燃烧形式来确定用于调节进气的充气效率的充气效率校正系数,并且通过系数校正所需的空燃比。 然后,至少基于燃料喷射量和校正后的所需空燃比(所需空燃比校正系数)来确定输出燃料喷射量。 当发动机在超稀燃烧燃烧下操作时,充电效率校正系数被确定为比在发动机在预混燃料燃烧时操作时更小的值。 无论EGR的运行是否进行,系数都是不同的。 由此,充分确定所需的空气/燃料比,因此可以适当地确定燃料喷射量。
    • 10. 发明授权
    • Fuel injection timing control system for internal combustion engine
    • 内燃机燃油喷射正时控制系统
    • US06334428B1
    • 2002-01-01
    • US09552263
    • 2000-04-19
    • Shuji NagataniMasahiro SatoMinoru Torii
    • Shuji NagataniMasahiro SatoMinoru Torii
    • F02B502
    • F02D41/401Y02T10/44
    • A fuel injection timing control system for a direct injection spark ignition internal combustion engine which is operated at an ultra-lean burn combustion or at a pre-mixture charged combustion. In the system, a fuel injection start timing limit by which injection of the determined fuel injection amount should be started and a fuel injection end timing limit by which injection of the determined fuel injection amount should be ended are determined based at least on the detected engine speed in accordance with predetermined data so as to avoid smoke from occurring in the engine, and when a determined fuel injection amount can not be injected within a time of period defined by the limits, a desired fuel injection start or end timing or the determined fuel injection amount is corrected, thereby ensuring the engine torque drop to a minimum extent, while surely avoiding smoke to occur.
    • 一种用于直喷式火花点火内燃机的燃料喷射正时控制系统,其在超稀燃燃烧或预混燃料燃烧下操作。 在该系统中,至少基于检测到的发动机来确定要开始喷射确定的燃料喷射量的燃料喷射开始正时限制和应该结束确定的燃料喷射量的喷射的燃料喷射结束时间限制 根据预定数据,以避免在发动机中发生烟雾,并且当在限定的时间段内不能注入确定的燃料喷射量时,期望的燃料喷射开始或结束时刻或所确定的燃料 喷射量被校正,从而确保发动机扭矩下降到最小程度,同时确保避免烟雾发生。