New Challenges and Technologies for the Emissions Monitoring System (OBD) in Heavy Duty Diesel Engines to Meet the Requirements of the PROCONVE P7 2012-36-0245
Due to the independent operation between the aftertreatment systems and the engine, the aim of the On Board Diagnostic System (OBD) is to ensure the engine emissions stay within the emissions standards during the whole vehicle useful life. In the case of the heavy duty diesel vehicles that use the Selective Catalytic Reduction System (SCR) or the Exhaust Gas Recirculation System (EGR) as the NOx aftertreatment technologies to meet the stringent emissions levels, the use of sensors in the exhaust pipe is required to control and to monitor the engine emissions.
These are new and great challenges to the national diesel engine developers who are working with these systems to get the homologation certification. Accurate mathematic models within the automotive control strategies are becoming ever more important and are strongly used to monitor the NOx emissions directly (in case of SCR systems using the NOx sensor) or indirectly (in case of EGR systems using the Lambda sensor).
The subject of this paper is to study the operation of the aftertreatment systems, to explore the charactheristics of the NOx and Lambda sensors and to analyse their behaviour in real applications, applying them into the emissions control and monitoring systems to achieve the legal requirements.
Citation: de Oliveira Costa, L. and Santos, R., "New Challenges and Technologies for the Emissions Monitoring System (OBD) in Heavy Duty Diesel Engines to Meet the Requirements of the PROCONVE P7," SAE Technical Paper 2012-36-0245, 2012, https://doi.org/10.4271/2012-36-0245. Download Citation
Author(s):
Leonardo de Oliveira Costa, Rodrigo Silva Santos
Affiliated:
IAV do Brasil
Pages: 13
Event:
21st SAE Brasil International Congress and Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Exhaust gas recirculation (EGR)
Exhaust emissions
Emissions control
Selective catalytic reduction
Environmental regulations and standards
Nitrogen oxides
Diesel / compression ignition engines
Exhaust pipes
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »
