OBD Diagnostic Strategies for LEVIII Exhaust Gas Aftertreatment Concepts 2015-01-1040
Upcoming motor vehicle emission regulations, such as California's LEVIII, continue to tighten emission limitations in diesel vehicles. These increasingly challenging emission requirements will be met by improving the combustion process (reducing engine-out emissions), as well as improving the exhaust gas aftertreatment efficiency.
Furthermore, intricate On-Board Diagnostics (OBD) systems are required to properly diagnose and meet OBD regulation requirements for complex aftertreatment systems. Under these conditions, current monitoring strategies are unable to guarantee reliable detection of partially failed systems. Additionally, new OBD regulations require aftertreatment systems to be diagnosed as a whole.
This paper covers potential OBD strategies for LEVIII aftertreatment concepts with regard to regulation compliance and robustness, while striving to use existing sensor concepts.
Citation: Nanjundaswamy, H., Deussen, J., Van Sickle, R., Tomazic, D. et al., "OBD Diagnostic Strategies for LEVIII Exhaust Gas Aftertreatment Concepts," SAE Int. J. Passeng. Cars - Mech. Syst. 8(1):37-45, 2015, https://doi.org/10.4271/2015-01-1040. Download Citation
Harsha K. Nanjundaswamy, Joel Deussen, Roger Van Sickle, Dean Tomazic, Tamas Szailer, Michael Franke, Matthias Kotter, Thomas Koerfer
FEV Inc., FEV GmbH, FEV Group Holding GmbH
SAE 2015 World Congress & Exhibition
SAE International Journal of Passenger Cars - Mechanical Systems-V124-6EJ, SAE International Journal of Passenger Cars - Mechanical Systems-V124-6