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    • 7. 发明公开
    • Method of diagnosing the operation of a cam profile shifting system.
    • Verfahren zur Diagnosis des Betriebs eines Nockenprofil-Umschaltsystems
    • EP1811161A1
    • 2007-07-25
    • EP06100708.4
    • 2006-01-23
    • Ford Global Technologies, LLC
    • Möller, PeterSvenske, Erik
    • F02D41/22F02D41/00
    • F02D41/221F01L13/0036F01L2800/11F02D41/0002F02D2041/001F02D2041/288F02D2200/0406F02D2200/1012Y02T10/42
    • Method of diagnosing the operation of a cam profile shifting system (12) for a combustion engine including a set of combustion chambers (3), each being provided with at least one intake valve (11) and a cam mechanism acting (17,14, 15) on each intake valve (11), said cam mechanism (13,14, 15) having at least two separate cam profiles (14,15) with different shapes and being controlled to selectably engage one of said cam profiles (14,15) for controlling the position of the intake valve (11), said method including the steps of:
      a) detecting an engine parameter (dP/dϕ,dn/dϕ) having a cyclic behaviour with respect to the angular position (ϕ) of a crank shaft (2b) arranged in the engine and which parameter (dP/dϕ,dn/dϕ) is a function of the volumetric efficiency (η) of the cylinder depletion;
      b) collecting a set of samples (x i ) of said engine parameter (dP/dϕ,dn/dϕ) during at least one engine cycle (ω) including a combustion event for each cylinder (3) in said set of combustion chambers;
      c) calculating the weight coefficient (W(1)) for a trigonometric base function F 1 including the trigonometrical function of the 1st order (cos(2π/ω)ϕ + jsin(2π/ω)ϕ) of the engine cycle (ω), in the crank angle domain [ϕ:0 - ω].
      d) comparing the weight coefficient (W(1)) with threshold values (T 1i ) and concluding that the position of all intake valves are not controlled by cam profiles of the same shape in the event the weight coefficients for the trigonometric base function F 1 of the 1st order (cos(2π/ω)ϕ + jsin(2π/ω)ϕ) is above a threshold value.
    • 用于诊断用于内燃机的凸轮轮廓转换系统(12)的操作的方法,所述内燃机包括一组燃烧室(3),每个燃烧室设置有至少一个进气门(11)和作用的凸轮机构(17,14, 15),所述凸轮机构(13,14,15)具有至少两个具有不同形状的分离的凸轮轮廓(14,15)并被控制以可选择地接合所述凸轮轮廓(14,15 ),用于控制所述进气门(11)的位置,所述方法包括以下步骤:a)检测相对于所述进气门的角位置(Õ)具有循环行为的发动机参数(dP /dÕ,dn /dÕ) 曲轴(2b)布置在发动机中,哪个参数(dP /dÕ,dn /dÕ)是气缸耗尽的体积效率(·)的函数; b)在包括所述燃烧室组中的每个气缸(3)的燃烧事件的至少一个发动机循环(É)期间收集一组所述发动机参数(dP /dÕ,dn /dÕ)的样品(x i) c)计算包括发动机循环的第一阶(cos(2 /É)Õ+ jsin(2À)Í)的三角函数的三角基函数F 1的权重系数(W(1))(É ),在曲柄角域[Õ:0 - É]。 d)将重量系数(W(1))与阈值(T 1i)进行比较,并得出结论,在三角基函数F的权重系数的情况下,所有进气门的位置不受相同形状的凸轮轮廓的控制 1次(cos(2À/É)Õ+ jsin(2À/É)Õ)高于阈值。
    • 9. 发明公开
    • Diagnostic method for a post-cat lambda sensor and a catalyst of an exhaust system
    • Diagnoseverfahrenfüreine Vorkatlambdasonde und ein Katalysator eines Abgassystems
    • EP1734242A1
    • 2006-12-20
    • EP05025027.3
    • 2005-11-16
    • Ford Global Technologies, LLC.
    • Karlflo, MatsSvenske, ErikLundén, MarcusCardell, Eric
    • F02D41/14F01N11/00
    • F01N11/00F01N13/009F01N13/0093F02D41/1495Y02T10/47
    • The present invention relates to a method for diagnosing an exhaust aftertreatment system comprising at least one catalyst (4) and a primary lambda probe (3) mounted upstream of the catalyst (4).
      including a diagnosis sequence (500) for simultaneously diagnosing the primary lambda probe (3) and the catalyst (4), said diagnosis sequence (500) comprising
      - controlling (500) the target lambda (air to fuel ratio) upstream of the first catalyst so as to alter between a rich and lean value, respectively, at a target time (t 0 )
      - measuring a primary lambda probe delay time (t delay ) being the time from the target time (t 0 ) to the time (t resp λ 1 ) at which the alteration of the target lambda is detected by the primary lambda probe, and/or
      - measuring a catalyst pulse width time (t pulse width ) being the time from the target time (t 0 ) to the time (t resp λ 2 ) at which the alteration of the target lambda results in an alteration of the lambda detected downstream of the catalyst,
      - evaluating the condition of the primary lambda probe (3) using said delay time (t delay ) and/or
      - evaluating the condition of the catalyst (4) using said catalyst pulse width time (t pulse width ).
    • 本发明涉及一种用于诊断排气后处理系统的方法,其包括安装在催化剂(4)上游的至少一种催化剂(4)和初级λ探针(3)。 包括用于同时诊断原始λ探针(3)和催化剂(4)的诊断序列(500),所述诊断序列(500)包括 - 控制(500)第一催化剂上游的目标λ(空气/燃料比) 以便分别在目标时间(t 0)之间改变富值和稀值之间 - 测量从目标时间(t 0)到时间(t resp)的时间的主λ探针延迟时间(t delay) 1),其中目标λ的改变由主λ探针检测,和/或 - 测量从目标时间(t 0)到时间(t)的时间的催化剂脉冲宽度时间(t脉冲宽度) (2),其中目标λ的改变导致催化剂下游检测到的λ的改变, - 使用所述延迟时间(t延迟)评估主λ探针(3)的状态和/或评估 使用所述催化剂脉冲宽度时间(t脉冲宽度)的催化剂(4)的条件。