公开(公告)号：EP2410157A4

公开(公告)日：2018-02-28

申请号：EP10753337

申请日：2010-02-04

申请人： HITACHI AUTOMOTIVE SYSTEMS LTD

发明人： NAKAGAWA SHINJI ,  KANETOSHI KAZUHIKO ,  KATOUGI KOUZO ,  ICHIHARA TAKANOBU ,  OHSUGA MINORU ,  TAKAMURA HIROYUKI

IPC分类号： F02D41/06 ,  F02D29/02 ,  F02D41/02 ,  F02D41/14 ,  F02D45/00

CPC分类号： F02D41/065 ,  F02D41/0295 ,  F02D41/1454 ,  F02D41/1475 ,  F02D2200/0814 ,  F02D2200/0816

摘要： Provided is a control device for an engine which is capable of purifying NOx with high efficiency at a restart after an idle stop without deteriorating purification efficiency of HC and CO. At the restart after the idle stop, an air-fuel ratio is controlled to be rich, and an atmosphere inside of a catalyst is estimated on the basis of a required time ”T from a time point at which an output value (VO2_2) of first oxygen concentration detection means upstream of the catalyst exceeds a predetermined value A1 to a time point at which an output value (VO2_2) of second oxygen concentration detection means downstream of the catalyst exceeds a predetermined value A2, whereby an air-fuel ratio at next and subsequent restarts is corrected so that the atmosphere inside of the catalyst is optimized at the next and subsequent restarts.