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Experimental Study of the Effect of Injection Pressure on Performance and Emissions in a Multi-Cylinder Common Rail Direct Injection Using Biodiesel

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Abstract:

The fossil fuels depletion and its environmental impacts encourages the development and utilization of biodiesel as renewable fuels. Optimatization of engine operational parameter is needed to obtained cleaner combustion. This study aims to evaluate the effect of 190, 200, and 210 MPa injection pressure on Common Rail Direct Injection (CRDI) diesel engine performance and exhaust emissions using B50 and B55 fuel mixtures at various engine speed (1500, 2000, 2500, and 3000 rpm). The results showed that injection pressure increase significantly improved engine performance and reduced emissions. Maximum power increased by 12.59% at 210 MPa compared to 190 MPa at 78.4 HP using B50, while torque increased from 177.6 Nm to 204.2 Nm. B55 fuels shows maximum power reaching 88.9 HP and maximum torque of 203.7 Nm at 210 MPa. Exhaust emissions decline as injection pressure increases. B55 fuel opacity emission decreases from 7.5% (190 MPa) to 6.3% (210 MPa), B50 also shows similar behaviour. This study reveals that injection pressure increase gives better performance and reduced emissions in diesel engines fueled by palm oil biodiesel blends.

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Periodical:

Engineering Headway (Volume 38)

Pages:

91-102

DOI:

https://doi.org/10.4028/p-pKso4D

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Online since:

June 2026

Authors:

Achmad Aminudin*, Abdur Rahman, Nanang Romandoni, Farid Majedi, Deni Nur Fauzi, Ahmad Yusril Aminullah

Keywords:

Biodiesel, Emission, Injection Pressure, Performance

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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