公开(公告)号：US06792346B2

公开(公告)日：2004-09-14

申请号：US10393355

申请日：2003-03-21

申请人： Hiroyuki Takebayashi ,  Hirohide Abe ,  Kouichi Terada

发明人： Hiroyuki Takebayashi ,  Hirohide Abe ,  Kouichi Terada

IPC分类号： F02D4500

CPC分类号： F02D41/064 ,  F01N3/2013 ,  F01N11/002 ,  F01N2550/00 ,  F02B2075/125 ,  F02D41/047 ,  F02D41/1446 ,  F02D41/187 ,  F02D2041/389 ,  F02D2200/0404 ,  F02D2200/0614 ,  F02D2200/0802 ,  Y02T10/123 ,  Y02T10/26 ,  Y02T10/47

摘要： A cold-state emission-reducing strategy wherein a diagnostic apparatus examines for possible malfunctions of a control unit during cold start. The diagnosis judges that the strategy is faulty if the cumulative amount of fuel injection is equal to or smaller than a predeterminable threshold value for a faulty judgement. Thus, the abnormality of the cold-state emission-reducing strategy is accurately and easily detected, by merely calculating the cumulative amount of an injection pulse width for the injector or the cumulative amount of fuel flow during a predeterminable cumulating time period after engine start, and comparing the calculated cumulative amount with the predeterminable judgement threshold.

摘要翻译： 冷态排放减少策略，其中诊断装置检查冷起动期间控制单元可能的故障。 如果燃油喷射的累计量等于或小于故障判断的可预定阈值，则诊断判断该策略是有故障的。 因此，通过仅计算喷射器的喷射脉冲宽度的累积量或者在发动机起动之后的可预定的累积时间段期间的燃料流量的累积量，可以准确且容易地检测冷态排放减少策略的异常， 以及将所计算的累积量与所述可预测判定阈值进行比较。