An Experimental Evaluation of Torque and Power Characteristics of a Baseline Diesel and a Methane-Converted Diesel Engines
Received: 17 March 2026 | Revised: 20 April 2026 | Accepted: 30 April 2026 | Online: 4 May 2026
Corresponding author: Nhan Nguyen Hoang
Abstract
This study presents an evaluation of the torque and power characteristics of a baseline diesel engine and of a diesel engine converted to operate on methane. The experiments were conducted on an MP100S test bench under identical operating conditions to determine the external performance characteristics before and after the fuel conversion. The results show that the maximum torque increased by approximately 24%, from 49.6 Nm to 62 Nm, while the maximum power increased by about 27%, from 11.7 kW at 2000 rpm to 14.9 kW at 2400 rpm. In addition, the peak power shifted toward a higher engine speed region by about 20%. The speed range of 1200-2200 rpm was identified as the most effective, with a stable power improvement of approximately 10%. These findings indicate that methane conversion can improve the external performance characteristics of the diesel engine, expand the power range, and provide useful experimental evidence for the application of methane as an alternative fuel for diesel engines.
Keywords:
diesel engine, methane fuel, engine speed, brake torque, brake powerDownloads
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Copyright (c) 2026 Nhan Nguyen Hoang, Khuong Nguyen Van Manh
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