公开(公告)号：US20180223744A1

公开(公告)日：2018-08-09

申请号：US15538006

申请日：2017-02-06

Applicant: Komatsu Ltd.

Inventor： Genki Ichikawa

IPC: F02D9/04 ,  F01N3/20

CPC classification number: F02D9/04 ,  F01N3/103 ,  F01N3/2066 ,  F01N2240/36 ,  F01N2260/14 ,  F01N2900/08 ,  F01N2900/1602 ,  F01N2900/1621 ,  F02D41/024 ,  F02D41/0275 ,  F02D41/146 ,  F02D2200/0802 ,  F02D2200/1002 ,  F02D2200/101 ,  F02D2700/04 ,  Y02A50/2325 ,  Y02T10/24

Abstract: An exhaust purifying device mounted in a working vehicle includes: an exhaust passage through which an exhaust gas discharged from an engine flows; a throttle valve configured to change a passage area of the exhaust passage; an exhaust aftertreatment device disposed downstream of the throttle valve; and a valve controller configured to control an open degree of the throttle valve. The valve controller is configured to control the open degree of the throttle valve to be larger in a low load region below a predetermined load range and in a high load region exceeding the predetermined load range than in a medium load region that is the predetermined load range.

公开(公告)号：US10473039B2

公开(公告)日：2019-11-12

申请号：US15538006

申请日：2017-02-06

Applicant: Komatsu Ltd.

Inventor： Genki Ichikawa

IPC: F01N3/20 ,  F02D9/04 ,  F01N3/10 ,  F02D41/02 ,  F02D41/14

Abstract: An exhaust purifying device mounted in a working vehicle includes: an exhaust passage through which an exhaust gas discharged from an engine flows; a throttle valve configured to change a passage area of the exhaust passage; an exhaust aftertreatment device disposed downstream of the throttle valve; and a valve controller configured to control an open degree of the throttle valve. The valve controller is configured to control the open degree of the throttle valve to be larger in a low load region below a predetermined load range and in a high load region exceeding the predetermined load range than in a medium load region that is the predetermined load range.