Aftertreatment Architecture and Control Methodologies for Future Light Duty Diesel Emission Regulations

Chilumukuru, Krishna; Gupta, Aniket; Ruth, Michael; Cunningham, Michael; Kothandaraman, Govindarajan; Cumaranatunge, Lasitha; Hess, Howard

doi:10.4271/2017-01-0911

Cited by 17 publications

(8 citation statements)

References 5 publications

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“…This allows the LNT to focus on high temperature NO X that is entering at temperatures over 300°C, thus eliminating between 60 and 70% of the platinum group metals (PGMs) [115]. This makes the LNT technology cheaper and economically appealing to the LD engine classification of 5000-6000 cc capacity [116,117]. However, for medium-and heavy-duty vehicles, high temperature solutions have been developed to address the challenge of high load requirements of the US NTE regulatory condition as reported by the authors of Refs.…”

Section: Nitrogen Oxide (No X ) Concentrationmentioning

confidence: 99%

Effects of Biodiesel Blends Varied by Cetane Numbers and Oxygen Contents on Stationary Diesel Engine Performance and Exhaust Emissions

Maroa¹,

Inambao²

2020

Numerical and Experimental Studies on Combustion Engines and Vehicles

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This work investigated waste plastic pyrolysis oil (WPPO), 2-ethyl hexyl nitrate (EHN), and ethanol as sources of renewable energy, blending conventional diesel (CD), WPPO, and ethanol with EHN was to improve the combustion and performance characteristics of the WPPO blends. EHN has the potential to reduce emissions of CO, CO2, UHC, NOX, and PM. Ethanol improves viscosity, miscibility, and the oxygen content of WPPO. Mixing ratios were 50/WPPO25/E25, 60/WPPO20/E20, 70/WPPO15/E15, 80/WPPO10/E10, and 90/WPPO5/E5 for CD, waste plastic pyrolysis oil, and ethanol, respectively. The mixing ratio of EHN (0.01%) was based on the total quantity of blended fuel. Performance and emission characteristics of a stationary 4-cylinder water-cooled diesel Iveco power generator were evaluated with ASTM standards. At 1000 rpm, the BSFC was 0.043 kg/kWh compared to CD at 0.04 kg/kWh. Blend 90/WPPO5/E5 had the highest value of 14% for BTE, while the NOX emissions for 90/WPPO5/E5, 80/WPPO10/E10, and 70/WPPO15/E15 were 384, 395, and 414 ppm, respectively, compared to CD fuel at 424 ppm. This is due to their densities of 792 kg/m3, 825 kg/m3 which are close to CD fuel at 845 kg/m3 and the additive EHN. These results show blends of WPPO, ethanol and EHN reduce emissions, and improve engine performance, mimicking CD fuel.

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Section: Nitrogen Oxide (No X ) Concentrationmentioning

confidence: 99%

Effects of Biodiesel Blends Varied by Cetane Numbers and Oxygen Contents on Stationary Diesel Engine Performance and Exhaust Emissions

Maroa¹,

Inambao²

2020

Numerical and Experimental Studies on Combustion Engines and Vehicles

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“…This is primarily due to the lack of real-time feedback information such NH3 slip through the SCR catalyst to tighten the dosing control. Although there have been many advancements on-board NH3 sensor measurements it is still a work in progress in order to make it a more robust and cost-effective solution [52,53]. Analytical models are models that make use of an analytical function that describes the responses of the system under study.…”

Section: Figure 14mentioning

confidence: 99%

Dual-layered Multi-Objective Genetic Algorithms (D-MOGA): A Robust Solution for Modern Engine Development and Calibrations

Padmavathy¹

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Dual-layered Multi-Objective Genetic Algorithms (D-MOGA): A Robust Solution for Modern Engine Development and Calibrations Pragalath Thiruvengadam Padmavathy Heavy-duty (HD) diesel engines are the primary propulsion systems used within the freight transportation sector and are subjected to stringent emissions regulations. The primary objective of this study is to develop a robust calibration technique for HD engine optimization in order to meet current and future regulated emissions standards during certification cycles and vocational activities such as drayage operations. Recently, California-Air Resources Board (C-ARB) has also shown interests in controlling off-certification cycle emissions from vehicles operating in the state of California by funding projects such as the Ultra-Low NOx study by Sharp et. al [1]. Moreover, there is a major push for the complex real-world driving emissions testing protocol as the confirmatory and certification testing procedure in Europe and Asia through the United Nations-Economic Commission for Europe (UN-ECE) and International Organization for Standardization (ISO). This calls for more advanced and innovative approaches to optimize engine operation to meet the regulated certification levels. A robust engine calibration technique was developed using dual-layered multi-objective genetic algorithms (D-MOGA) to determine necessary engine control parameter settings. The study focused on reducing fuel consumption and lowering oxides of nitrogen (NOx) emissions, while simultaneously increasing exhaust temperatures for thermal management of exhaust aftertreatment system. The study also focused on using D-MOGA to develop a calibration routine that simultaneously calibrates engine control parameters for transient certification cycles and

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“…The same blend of fuel was used throughout testing as it was stored and consumed from a local fuel storage facility. 1 Obtained from reference [42] where similar fuel was used 2 Obtained from reference [43] 3.4 Aftertreatment System…”

Section: Fuel Propertiesmentioning

confidence: 99%

“…The Environmental Protection Agency (EPA) in the U.S. sets standards for engine tail pipe emissions which are becoming more stringent for heavy duty diesel engines every few years as seen in Table 1.1. [2] Many technologies are being implemented on diesel engine to control emissions which include exhaust gas recirculation (EGR), advanced fuel injection strategies etc. Particularly for heavy duty diesel engines, a typical aftertreatment system consisting of a Diesel Oxidation Catalyst (DOC), a Catalyzed Particulate Filter (CPF), a Selective Catalytic Reduction (SCR) with urea injection assembly and an Ammonia Oxidation Catalyst (AMOX) is currently being used by manufacturers to meet the EPA standards for year 2010/2013 shown in Table 1.1 [3].…”

Section: Chapter 1 Introductionmentioning

confidence: 99%

Experimental and Modeling Study of Particulate Matter Oxidation Under Loading Conditions for a SCR Catalyst on a Diesel Particulate Filter

Jadav¹

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Aftertreatment Architecture and Control Methodologies for Future Light Duty Diesel Emission Regulations

Cited by 17 publications

References 5 publications

Effects of Biodiesel Blends Varied by Cetane Numbers and Oxygen Contents on Stationary Diesel Engine Performance and Exhaust Emissions

Effects of Biodiesel Blends Varied by Cetane Numbers and Oxygen Contents on Stationary Diesel Engine Performance and Exhaust Emissions

Dual-layered Multi-Objective Genetic Algorithms (D-MOGA): A Robust Solution for Modern Engine Development and Calibrations

Experimental and Modeling Study of Particulate Matter Oxidation Under Loading Conditions for a SCR Catalyst on a Diesel Particulate Filter

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