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US07905135B2 Throttle upstream pressure estimating apparatus and cylinder charged air quantity calculating apparatus for internal combustion engine 失效
用于内燃机的节气门上游压力估计装置和汽缸充气量计算装置

  • 专利标题： Throttle upstream pressure estimating apparatus and cylinder charged air quantity calculating apparatus for internal combustion engine
  • 专利标题（中）： 用于内燃机的节气门上游压力估计装置和汽缸充气量计算装置
  • 申请号： US12659053
    申请日： 2010-02-24
  • 公开(公告)号： US07905135B2
    公开(公告)日： 2011-03-15
  • 发明人: Tomoaki Nakano , Atsushi Koike
  • 申请人： Tomoaki Nakano , Atsushi Koike
  • 申请人地址： JP Kariya, Aichi-pref.
  • 专利权人： Denso Corporation
  • 当前专利权人： Denso Corporation
  • 当前专利权人地址： JP Kariya, Aichi-pref.
  • 代理机构： Nixon & Vanderhye PC
  • 优先权： JP2007-164512 20070622; JP2007-167187 20070626
  • 主分类号： G01M15/09
  • IPC分类号： G01M15/09
Throttle upstream pressure estimating apparatus and cylinder charged air quantity calculating apparatus for internal combustion engine
摘要：
In a non-critical pressure region where a pressure ratio [Pm/Pthrup(i−1)] of an intake air pressure Pm (throttle downstream pressure) detected by an intake air pressure sensor to a previous throttle upstream pressure Pthrup(i−1) is greater than a predetermined value B, the previous throttle upstream pressure Pthrup(i−1) is substituted for one of two terms of the throttle upstream pressures Pthrup(i) included in an intake system model so that present throttle upstream pressure Pthrup(i) is calculated. In a critical pressure region where the pressure ratio is less than or equal to the predetermined value B, a physical value f(Pm/Pthrup(i)) using a pressure ratio [Pm/Pthrup(i)] of the intake air pressure Pm to a present throttle upstream pressure Pthrup(i) as a parameter is regarded as a steady value fc so that the present throttle upstream pressure Pthrup(i) is calculated.
摘要（中）：

在进气压力传感器检测到的进气压力Pm（节气门下游压力）的压力比[Pm / Pthrup（i-1）]与前一节气门上游压力Pthrup（i-1）的非临界压力区域 ）大于预定值B时，先前的节气门上游压力Pthrup（i-1）被替换为进气系统模型中包括的节气门上游压力Pthrup（i）的两项中的任一项，使得当前油门上游压力Pthrup i）计算。 在压力比小于或等于预定值B的临界压力区域中，使用进气压力Pm的压力比[Pm / Pthrup（i）]的物理值f（Pm / Pthrup（i）） 将作为参数的当前节气门上游压力Pthrup（i）视为稳定值fc，从而计算当前节气门上游压力Pthrup（i）。

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