Title: Assessment of technological and financial challenges in upgradation of BS-III and BS-IV vehicles

Authors: Sameer Arora

Addresses: Central Pollution Control Board, East Arjun Nagar, Delhi, 110032, India

Abstract: Vehicular emission has raised several concerns worldwide due to the falling air quality. The government and legislative bodies enforce improved emission standards norms for new vehicles to reduce vehicular emissions. However, millions of vehicles are running on roads complying with older norms and emitting pollutants at high concentrations in the atmosphere. There is a vital requirement for the upgradation of old vehicles to meet the improvised emission norms. This study summaries the emissions from the diesel engine and techniques to minimise the emission of pollutants. The complex after-treatment is required in the older diesel engine, which emits higher NOx and PM compared to petrol vehicles, to comply with stringent BS-VI norms. The retrofitting of vehicles with selective catalytic reductant (SCR) and diesel particulate filter (DPF) can reduce NOx by 70% and PM by 85% in diesel vehicles, respectively. The study demonstrates the technical and economic aspects of retrofitting diesel vehicle.

Keywords: diesel vehicle; BS-VI; DOC; diesel oxidation catalyst; DPF; diesel particulate filter; SCR; selective catalytic reductant.

DOI: 10.1504/IJVD.2023.134760

International Journal of Vehicle Design, 2023 Vol.92 No.2/3/4, pp.382 - 402

Received: 19 Mar 2022
Received in revised form: 25 Dec 2022
Accepted: 18 May 2023
Published online: 09 Nov 2023 *

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