Emission Performance and Durability Validation Methodology for Heavy Commercial Vehicle After-treatment Systems

Subramanian, Karthikeyan; Suresh, A.L.; Mahadevan, Sathyanandan; Sadagopan, Krishnan

doi:10.4271/2022-28-0327

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…For this, a platinum (Pt)-catalyst-coated DOC substrate is used to convert NO to NO2 in the exhaust gas. In this study, for the selected catalyst, the passive regeneration of soot in the presence of NO2 is accomplished between the temperature ranges of 250 °C and 375 °C [11][12][13][14]. Active regenerations are required due to the challenging operating conditions, and Cordierite DPF material is chosen to meet the DPF's robustness requirements.…”

Section: Fig 5 Soot Accumulation Processmentioning

confidence: 99%

Study on Selection of Diesel Engine Exhaust After-Treatment System Materials and Emission Performance for Genset Applications

SUBRAMANİAN,

KANDASWAMY

2023

International Journal of Automotive Science and Technology

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The use of diesel engines for the transportation sector is ubiquitous and covers a broad continuum, like buses, trucks, agriculture, construction equipment, generators, and industrial applications. However, because of their increased use of off-road engines, they contribute more emissions in various sectors than on-road. As a result, worldwide, regardless of ongoing emission control efforts, these off-road, stationary engines also continue to be a substantial source of air pollutant emissions in the United States, European Union and Asian markets. Accordingly, while improving emissions performance, the selection of after-treatment system materials and the use of compatible after-treatment specification selections are also critical. This is only possible by effectively combining clean diesel technologies such as Fuel Injection Equipment (FIE), Turbocharger with Intercooler (TCIC), Cooled Exhaust Gas Recirculation (C-EGR), and after-treatment systems like Diesel Oxidation Catalyst (DOC), Selective Catalytic Reduction (SCR), and Diesel Particulate Filter (DPF). Overall, in this study, the influence of after-treatment system configurations and their effect on emission reduction performance are studied for three different DOC specifications based on emission testing for catalyst and size optimization. With the selected DOC catalyst specification, suitable combinations of DPF and SCR specifications are optimized further using GT-SUIT software simulation. This study was carried out during the conversion of a 15 kW NA engine to a 27 kW TCIC engine to meet diesel engine emission norms.

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Section: Fig 5 Soot Accumulation Processmentioning

confidence: 99%

Study on Selection of Diesel Engine Exhaust After-Treatment System Materials and Emission Performance for Genset Applications

SUBRAMANİAN,

KANDASWAMY

2023

International Journal of Automotive Science and Technology

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DeNOx Strategy Adaptation and Optimization in Naturally Aspirated Engine LCV Application for BSVI OBD-II Norms

Hareesh,

Sharma

et al. 2024

SAE Technical Paper Series

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<div class="section abstract"><div class="htmlview paragraph">Powertrain complexity rapidly increasing to meet fast moving regulation requirements. The BS6 Phase-1 regulation norms were implemented in India from April 1, 2020 and replaced the previous <a href="https://www.spinny.com/blog/index.php/bs4-vs-bs6/" target="_blank">BS4</a> norms. Phase-2 of the BS6 regulation norms were came into effect on April 1, 2023. To meet this stringent regulation requirement, need effective performance of after treatment systems like DOC, DPF and SCR demands critical hardware selection and implementation. In Indian market, LCV application is cost sensitive and highly competitive where operational cost is most critical factor.</div><div class="htmlview paragraph">Naturally aspirated engine has less operating cost, which is the best for LCV applications, but is has its own challenges to meet BS6 norms like higher engine out NOx, dynamic temperature profiles etc. A robust DeNOx emissions strategy is developed in naturally aspirated engine LCV application to meet cycle emissions, real drive emissions and OBD requirements. It is always a challenge to adapt EATS in LCV application as these are low-cost vehicles and EATS components impacts the overall cost of the vehicle.</div><div class="htmlview paragraph">This paper briefs about robust DeNOx emissions strategy in naturally aspirated engine LCV application for BSVI OBD-II norms to address high engine out NOx with dynamic temperature profiles which is first time in India. Feasibility study has done with two different architecture and finalized the better one by considering EATS performance robustness and overall system layout. SCR catalyst size and urea mixer design has done by considering EATS architecture and LCV application. SCR performance has optimized with higher engine out NOx and dynamic temperature profiles to meet cycle emissions, real drive emissions and OBD requirements. Vehicle with EATS system validated on road at sea level and various altitudes with different drive profiles like city, 2lane and highway. Validation results assure real drive emissions well within limit with optimized fuel economy and urea consumption.</div></div>

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Emission Performance and Durability Validation Methodology for Heavy Commercial Vehicle After-treatment Systems

Cited by 2 publications

References 15 publications

Study on Selection of Diesel Engine Exhaust After-Treatment System Materials and Emission Performance for Genset Applications

Study on Selection of Diesel Engine Exhaust After-Treatment System Materials and Emission Performance for Genset Applications

DeNOx Strategy Adaptation and Optimization in Naturally Aspirated Engine LCV Application for BSVI OBD-II Norms

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