Pre-Heating the Aftertreatment System with a Burner Tenneco Incorporated

Format:

Book

Conference/Event

Author/Creator:

Harris, Thomas, author.

Contributor:

Bellard, Raphael

Muhleck, Matthew

Palmer, Guenter

Conference Name:

WCX SAE World Congress Experience (2022-04-05 : Detroit & Online, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2022

Summary:

NOx emissions limits for commercial trucks will be drastically reduced in the United States and Europe later in this decade. The most recent Euro VII proposal suggested that pre-heating of the aftertreatment system with a diesel burner may be needed to meet a new low-NOx limit. Pre-heating serves to prepare the SCR catalyst so that it can begin to convert NOx almost immediately after the engine is started. This is particularly important for an engine that is not equipped with exhaust gas recirculation to reduce engine-out NOx.This study considered a burner installed between a 12.4 liter engine and an appropriately-sized in-line DOC/DPF/SCR aftertreatment system. Initially, a wide range of burner and air pump operating conditions were examined to determine the maximum fueling rate and corresponding air flow rate necessary to complete combustion and to convey the resultant heat downstream to the aftertreatment components. From this survey, an optimal realistic operating condition for pre-heating emerged. This condition was then applied for various periods of time before the engine was started in order to run various regulatory cycles, including the cold- and hot-start FTP and WHTC

Notes:

Vendor supplied data

Publisher Number:

2022-01-0554

Access Restriction:

Restricted for use by site license