Assessment of CNG & CBG Composition Variation on CO
2
Emissions, Engine Performance and Durability for a Small Size PFI Engine
2022-28-0020
Considering the stricter regulation norms to be imposed by the policymakers to reduce carbon footprint and to meet the goals of Paris Agreement, Automotive industry is now focusing on relatively cleaner fuels such as Compressed Natural-Gas (CNG), Compressed Biogas (CBG) etc. alternative to conventional fuels i.e., petrol and diesel. As emissions from conventional fuels are one of the biggest contributors to climate change and are the primal cause of global warming, the world needs to limit their usage and to explore the possibilities of renewable fuels with less carbon emission keeping carbon neutrality vision in mind.
In current scenario, gaseous fuel composition varies from region to region, and it impacts CO2 emission, engine performance parameters etc. This encourages automotive manufacturers to understand impact on CO2 emissions for regulatory cycles, impact on engine power & torque as it impacts vehicle acceleration performance & engine peak pressure, temperature for impact on Engine durability with variation in supplied CNG and CBG fuel quality/compositions.
A 1D-CFD Engine model, developed in GT POWER, was used to carry out this study. The engine considered in this investigation was three cylinder naturally aspirated small passenger car engine. GT based engine simulation model was first calibrated within desired accuracy and used for study. In this paper fuel physical properties, variation on vehicle CO2 for regulatory cycle, Impact on Engine full load power, Torque & variation in peak temperature & pressures are analyzed & discussed.
Citation: Kaushik, H., Rani, A., and Sarna, N., "Assessment of CNG & CBG Composition Variation on CO2 Emissions, Engine Performance and Durability for a Small Size PFI Engine," SAE Technical Paper 2022-28-0020, 2022, https://doi.org/10.4271/2022-28-0020. Download Citation
