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    • 5. 发明授权
    • Exhaust gas recirculation system for internal combustion engine
    • 内燃机排气再循环系统
    • US4471745A
    • 1984-09-18
    • US536984
    • 1983-09-29
    • Sadashichi YoshiokaTatsuro OdaYoshitaka NomotoKatsuhiko Yokooku
    • Sadashichi YoshiokaTatsuro OdaYoshitaka NomotoKatsuhiko Yokooku
    • F02D21/08F02D41/00F02D41/14F02D43/00F02D45/00F02M25/07F02M25/06
    • F02D41/005F02D41/1487Y02T10/47
    • An internal combustion engine is provided with an exhaust gas recirculating passage for communicating the intake passage and the exhaust passage thereof. The recirculating passage is provided with a valve for controlling the amount of recirculated exhaust gas. A fundamental air-fuel ratio control value for regulating the air-fuel ratio of the intake gas to a predetermined value is corrected by an operating condition correction value according to the operating condition of the engine. The operating condition correction value is successively changed to an optimal value by comparing the actually obtained air-fuel ratio with a predetermined value. The operating condition correction value for correcting the fundamental air-fuel ratio control value when the exhaust gas recirculation is carried out is changed independently from the same for correcting the fundamental air-fuel ratio correction value when the exhaust gas recirculation is not carried out. The initial values of the former correction value and the latter correction value are compared with each other, while the present values of the former correction value and the latter correction value are compared with each other. The comparison value of the initial values and the comparison value of the present values are compared with each other to detect clogging of the recirculating passage. When clogging is detected, the valve is controlled to compensate for the clogging.
    • 内燃机设置有排气再循环通道,用于连通进气通道和排气通道。 再循环通道设置有用于控制再循环废气量的阀。 通过根据发动机的运转状态的运转状态校正值来校正用于将进气的空燃比调整为规定值的基本空燃比控制值。 通过将实际获得的空燃比与预定值进行比较,将操作条件校正值连续地变更为最佳值。 当进行废气再循环时,用于校正基本空燃比控制值的操作条件校正值与不进行排气再循环时校正基本空燃比校正值的方法相同地改变。 将前一校正值和后一校正值的初始值彼此进行比较,而将前一校正值和后一校正值的当前值彼此进行比较。 将当前值的初始值和比较值的比较值进行比较,以检测再循环通道的堵塞。 当检测到堵塞时,控制阀门以补偿堵塞。