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    • 24. 发明公开
    • Apparatus and method for estimating internal EGR amount in internal combustion engine
    • 装置和方法用于在内燃机推定内部EGR量
    • EP1450023A2
    • 2004-08-25
    • EP04003658.4
    • 2004-02-18
    • TOYOTA JIDOSHA KABUSHIKI KAISHA
    • Uchida, TakefumiMuto, Harufumi
    • F02D21/08
    • F02D13/0219F02D13/0261F02D41/0062F02M26/01F02M26/48Y02T10/18Y02T10/47
    • An electronic control unit of an internal combustion engine computes a remaining combusted gas amount M egr1 , which exists in a cylinder immediately before an intake valve is opened, based on an intake pipe pressure Pm, an engine speed NE, and an intake valve opening timing T open . At the same time, the control unit computes a backflow combusted gas amount M egr2 , which is the amount of combusted gas that flows back into the cylinder from an exhaust pipe after the intake valve is opened, based on the intake pipe pressure Pm, the engine speed NE and a valve overlap amount OL. The control unit computes the sum of the remaining combusted gas amount M egr1 and the backflow combusted gas amount M egr2 , and sets the sum as an estimated internal EGR amount M egrALL . As a result, the internal EGR amount is readily and accurately estimated.
    • 内燃发动机的电子控制单元计算的剩余燃烧气体量M EGR1,在紧接在一个气缸中存在进气阀被打开时,在以发动机速度NE进气管压力Pm根据,并且在进气门开启正时 公开的科技。 在在Sametime,控制单元计算的逆流燃烧气体量M EGR2,所有这一切是燃烧气体的那样流回从在排气管中的进气门开启之后,基于所述进气管压力Pm气缸的量, 发动机转速NE和气门重叠量OL。 所述控制单元计算的剩余燃烧气体量M EGR1和逆流燃烧气体量M EGR2的总和,并将这个和设置为在估计内部EGR量M egrALL。 其结果是,内部EGR量被精确地设置并容易估计。
    • 26. 发明公开
    • Device for estimating the intake air amount of an internal combustion engine
    • Vorrichtung zur Bestimmung der Ansaugluftmenge einer Brennkraftmaschine
    • EP1416145A2
    • 2004-05-06
    • EP03024765.4
    • 2003-10-29
    • TOYOTA JIDOSHA KABUSHIKI KAISHA
    • Muto, Harufumi
    • F02D41/18
    • F02D41/18F02D2200/0402F02D2200/0408F02D2200/703
    • A device for estimating the amount of intake air of an internal combustion engine comprising means for calculating an intake pipe pressure downstream of the throttle valve, and means for calculating the amount of intake air based on said calculated intake pipe pressure. The intake pipe pressure calculation means calculates the actual intake pipe pressure using the intake pipe pressure and the amount of air passing through the throttle valve calculated during the previous calculation step. The device for estimating the amount of intake air further comprises limitation means for replacing the actual intake pipe pressure by the atmospheric pressure when the actual intake pipe pressure calculated is higher than the atmospheric pressure, and correction means for correcting the amount of air passing through the throttle valve at the previous calculation step based on the pressure differential between the atmospheric pressure and the intake pipe pressure calculated at the previous calculation step when the actual intake pipe pressure is replaced, by the atmospheric pressure.
    • 当进气管压力被大气压力代替时,校正单元基于大气压力和先前计算的进气管道压力之间的压力差校正先前计算出的通过节流阀(6)的空气量。 进气管压力计算单元基于先前计算的进气管压力和预先计算的通过节流阀的空气量来计算节气门下游的进气管压力。 进气量计算单元基于当前计算的进气管压力来计算进气量。 当当前计算的进气管压力高于大气压力时,限制单元将当前计算出的进气管压力与大气压替换。