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A Technical Review of Compressed Natural Gas as an Alternative Fuel for Internal Combustion Engines

Author(s): Semin | Rosli A. Bakar | Semin | Rosli A. Bakar

Journal: American Journal of Engineering and Applied Sciences
ISSN 1941-7020

Volume: 1;
Issue: 4;
Start page: 302;
Date: 2008;
Original page

Keywords: Compressed natural gas | alternative fuel | engine development

Natural gas is promising alternative fuel to meet strict engine emission regulations in many countries. Compressed natural gas (CNG) has long been used in stationary engines, but the application of CNG as a transport engines fuel has been considerably advanced over the last decade by the development of lightweight high-pressure storage cylinders. Engine conversion technology is well established and suitable conversion equipment is readily available. For spark ignition engines there are two options, a bi-fuel conversion and use a dedicated to CNG engine. For compression ignition engines converted to run on natural gas, there are two main options discussed, there are dual-fuel engines and normal ignition can be initiated. Natural gas engines can operate at lean burn and stoichiometric conditions with different combustion and emission characteristics. In this paper, the CNG engines research and development fueled using CNG are highlighted to keep the output power, torque and emissions of natural gas engines comparable to their gasoline or diesel counterparts. The high activities for future CNG engines research and development to meet future CNG engines is recorded in the paper.
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