公开(公告)号：US20150089925A1

公开(公告)日：2015-04-02

申请号：US14477968

申请日：2014-09-05

Applicant: KUBOTA Corporation

Inventor： Kentarou KITA ,  Tamotsu KUNO ,  Katsushi INOUE ,  Yuuji TAKEMURA ,  Yuuki ISHII ,  Yusuke KOMEMUSHI ,  Tomoya HASEGAWA

IPC: F01N3/025 ,  F01N9/00

CPC classification number: F01N9/002 ,  F01N3/023 ,  F01N2430/06 ,  F01N2430/085 ,  F01N2430/10 ,  F01N2550/04 ,  F01N2900/0408 ,  F01N2900/1404 ,  F01N2900/1602 ,  F01N2900/1606 ,  F02D41/0002 ,  F02D41/025 ,  F02D41/029 ,  F02D41/1446 ,  F02D2011/102 ,  F02D2200/0802 ,  F02D2200/0812 ,  Y02T10/26 ,  Y02T10/42 ,  Y02T10/47

Abstract: The present invention provides a diesel engine capable of preventing a PM accumulation amount from increasing excessively. If DOC inlet exhaust gas temperature (“IEGT”) does not reach a predetermined value T0, a control unit carries out air intake amount feedback control (“AIAFC”), and a target value of intake throttling is set to a predetermined air intake amount. If the DPF regenerating processing is not started even if elapsed time reaches a predetermined value t after AIAFC is started in a state where the DOC IEGT does not reach the predetermined value T0, the control unit changes AIAFC to exhaust gas temperature feedback control (“EGTFC”). In EGTFC, the control unit changes a target value of intake throttling to a predetermined DOC IEGT T0. If application of a load exceeding a predetermined amount is detected before the DOC IEGT reaches the predetermined value T0, the control unit returns EGTFC to AIAFC.

Abstract translation: 本发明提供一种能够防止PM堆积量过度增加的柴油发动机。 如果DOC入口排气温度（“IEGT”）未达到预定值T0，则控制单元执行进气量反馈控制（“AIAFC”），将进气节流的目标值设定为预定的进气量 。 即使在DOCIEGT未达到规定值T0的状态下AIAFC开始后经过时间达到规定值t，DPF再生处理也不开始，控制部将AIAFC变更为排气温度反馈控制（“EGTFC “）。 在EGTFC中，控制单元将进气节流的目标值改变为预定的DOC IEGT T0。 如果在DOC IEGT达到预定值T0之前检测到超过预定量的负载的应用，则控制单元将EGTFC返回到AIAFC。