Different Methods to Improve the Exhaust Gas Temperature in Modern Stage V Off-Road Diesel Engine over Transient Emission Cycles

2020-01-0903

04/14/2020

Features
Event
WCX SAE World Congress Experience
Authors Abstract
Content
This paper presents several methods to improve the exhaust gas temperature of a modern diesel engine. A high exhaust gas temperature is needed to improve the after-treatment system efficiency and particulate filter regeneration in low engine loads. This study is based on experimental measurements of two Stage 5 level off-road diesel engines. The effect of the different heating methods determined over steady state runs and emission and performance are presented with standard emission transient test procedure (NRTC). In the first step of the study, an intake air restriction and an exhaust gas restriction method are compared. The intake restriction produces better fuel economy over the measuring cycle. However, with the exhaust restriction, higher exhaust gas temperature can be achieved in low engine loads. In the second phase of study, the intake air restriction method was implemented in the research engine. In addition, active waste gate controlling, and injection retardation methods were taken in use for heating purposes. The engine performance was determined with normal calibration and with high exhaust temperature calibration. The differences to the exhaust temperature, engine performance and emission were presented in transient emission cycle NRTC.
Meta TagsDetails
DOI
https://doi.org/10.4271/2020-01-0903
Pages
8
Citation
Lauren, M., Karhu, T., Niemi, S., Laivola, M. et al., "Different Methods to Improve the Exhaust Gas Temperature in Modern Stage V Off-Road Diesel Engine over Transient Emission Cycles," SAE Technical Paper 2020-01-0903, 2020, https://doi.org/10.4271/2020-01-0903.
Additional Details
Publisher
Published
Apr 14, 2020
Product Code
2020-01-0903
Content Type
Technical Paper
Language
English