Pre-Heating the Aftertreatment System with a Burner
2022-01-0671
03/29/2022
- Content
- NOx emissions limits for commercial trucks will be drastically reduced in the United States and Europe later in this decade. European regulators have proposed that pre-heating of the aftertreatment system with a diesel burner may be needed to meet their new limit, particularly if the engine is not equipped with exhaust gas recirculation to reduce engine-out NOx. This study considered a burner installed between a 13L 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.
- Citation
- Harris, T., Bellard, R., Muhleck, M., and Palmer, G., "Pre-Heating the Aftertreatment System with a Burner," SAE Technical Paper 2022-01-0671, 2022, .