公开(公告)号：US08463532B2

公开(公告)日：2013-06-11

申请号：US13202350

申请日：2010-02-04

申请人： Shinji Nakagawa ,  Kazuhiko Kanetoshi ,  Kouzo Katougi ,  Takanobu Ichihara ,  Minoru Ohsuga ,  Hiroyuki Takamura

发明人： Shinji Nakagawa ,  Kazuhiko Kanetoshi ,  Kouzo Katougi ,  Takanobu Ichihara ,  Minoru Ohsuga ,  Hiroyuki Takamura

IPC分类号： F02D41/00

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 ΔT 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.

摘要翻译： 提供一种用于发动机的控制装置，其能够在怠速停止之后重新启动时能够高效地净化NOx，而不会降低HC和CO的净化效率。在怠速停止后的重启时，将空燃比控制为 基于从催化剂上游的第一氧浓度检测装置的输出值（VO2-2）（VO2-2）超过规定值A1到a的时间点的所需时间DeltaT来估计催化剂内部的气氛 在催化剂下游的第二氧浓度检测装置的输出值（VO2-2）超过预定值A2的时间点，由此校正下一次和随后的重新启动时的空燃比，使得催化剂内部的气氛为 在下次重新启动和后续重新启动时优化。

公开(公告)号：US20110315108A1

公开(公告)日：2011-12-29

申请号：US13202350

申请日：2010-02-04

申请人： Shinji Nakagawa ,  Kazuhiko Kanetoshi ,  Kouzo Katougi ,  Takanobu Ichihara ,  Minoru Ohsuga ,  Hiroyuki Takamura

发明人： Shinji Nakagawa ,  Kazuhiko Kanetoshi ,  Kouzo Katougi ,  Takanobu Ichihara ,  Minoru Ohsuga ,  Hiroyuki Takamura

IPC分类号： F02N11/08

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 ΔT 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.

摘要翻译： 提供一种用于发动机的控制装置，其能够在怠速停止之后重新启动时能够高效地净化NOx，而不会降低HC和CO的净化效率。在怠速停止后的重启时，将空燃比控制为 在催化剂上游的第一氧浓度检测装置的输出值（VO2-2）超过规定值A1的时刻，基于所需时间＆Dgr; T，估计催化剂内部的气氛， 到催化剂下游的第二氧浓度检测装置的输出值（VO2-2）超过预定值A2的时间点，由此校正下次再次启动时的空燃比，使得在 催化剂在下一次和随后的重新启动时被优化。