公开(公告)号：US20180223756A1

公开(公告)日：2018-08-09

申请号：US15427093

申请日：2017-02-08

Applicant: Caterpillar Inc.

Inventor： Wesley G. Benson ,  Colleen J. Anderson ,  Joseph K. Getz ,  Allen R. Bowman ,  William B. Marcum ,  Brandon T. Shull

IPC: F02D41/02 ,  F01N3/08 ,  F01N11/00 ,  F01N9/00

CPC classification number: F01N9/005 ,  B60W50/14 ,  F01N3/021 ,  F01N3/0835 ,  F01N3/103 ,  F01N3/2066 ,  F01N9/00 ,  F01N2430/00 ,  F01N2560/023 ,  F01N2560/06 ,  F01N2560/07 ,  F01N2570/12 ,  F01N2900/0418 ,  F01N2900/0601 ,  F01N2900/08 ,  F01N2900/1402 ,  F01N2900/1404 ,  F01N2900/1411 ,  F02D41/027 ,  F02D41/1459 ,  F02D2041/026 ,  F02D2200/08 ,  Y02T10/24 ,  Y02T10/47

Abstract: A method for operating an aftertreatment system of an engine is disclosed. The method includes measuring, using one or more sensors, at least one operating parameter of the engine system; estimating, by a controller, a mass of hydrocarbon retained by an aftertreatment component using the at least one operating parameter; determining, by the controller, a percent load of hydrocarbon using the mass of hydrocarbon; comparing, by the controller, the percent load to a predetermined hydrocarbon load threshold; and providing at least one alert indicating a need to initiate a stepwise increase in an engine power to one or more predetermined engine speeds for one or more predetermined durations, if the percent load exceeds the predetermined hydrocarbon load threshold.