公开(公告)号：US20180080358A1

公开(公告)日：2018-03-22

申请号：US15273264

申请日：2016-09-22

Applicant: Caterpillar Inc.

Inventor： James S. Ulstad ,  Kranti K. Nellutla ,  Greg L. Armstrong ,  Steven Y. Tian ,  Brian P. Brennan ,  Sasidhar Rayasam ,  Anand KrishnamurthyGopalan

IPC: F01N3/20

CPC classification number: F01N3/206 ,  F01N3/023 ,  F01N9/002 ,  F01N2430/06 ,  F02D41/029 ,  F02D41/405 ,  Y02T10/44 ,  Y02T10/47

Abstract: An engine has an injector communicating with a combustion chamber to introduce a plurality of dosing shots to mix with exhaust gases and regenerate an aftertreatment device downstream of the combustion chamber. An apportionment strategy can apportion a per cylinder quantity, representing the quantity of dosing fuel to introduce per cylinder per combustion cycle, among a predefined number of dosing shots each having a first per shot quantity. The strategy compares the predefined number of dosing shots with a temporal dosing window to determine if predefined number of dosing shots can be conducted within the temporal dosing window. If so, the strategy proceeds to introduce the predefined number of dosing shots and if not, the strategy may recalculate a reduced number of dosing shots and reapportions a second per shot quantity.

公开(公告)号：US10794251B2

公开(公告)日：2020-10-06

申请号：US15273264

申请日：2016-09-22

Applicant: Caterpillar Inc.

Inventor： James S. Ulstad ,  Kranti K. Nellutla ,  Greg L. Armstrong ,  Steven Y. Tian ,  Brian P. Brennan ,  Sasidhar Rayasam ,  Anand KrishnamurthyGopalan

IPC: F01N3/20 ,  F02D41/40 ,  F01N3/023 ,  F01N9/00 ,  F02D41/02

Abstract: An engine has an injector communicating with a combustion chamber to introduce a plurality of dosing shots to mix with exhaust gases and regenerate an aftertreatment device downstream of the combustion chamber. An apportionment strategy can apportion a per cylinder quantity, representing the quantity of dosing fuel to introduce per cylinder per combustion cycle, among a predefined number of dosing shots each having a first per shot quantity. The strategy compares the predefined number of dosing shots with a temporal dosing window to determine if predefined number of dosing shots can be conducted within the temporal dosing window. If so, the strategy proceeds to introduce the predefined number of dosing shots and if not, the strategy may recalculate a reduced number of dosing shots and reapportions a second per shot quantity.