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Compressed natural gas engines. A review

Kowalewicz A.

Journal of KONES

2009

Vol. 16, No. 3

173-183

Resources, production, refuelling stations and physic-chemical properties of natural gas are presented. Technical problems connected with application of natural gas to SI and CI engines are shown and analyzed. Presently most of gas vehicles are converted from gasoline to natural gas application but also many companies produce gas vehicles driven with Sl engines originally fabricated as gas vehicles. However natural gas spark ignition engines have lower torque than CI engines normally used in trucks, pick-ups and busses. Therefore CI engines are also adapted to gas fuelling as dual-fuel engines. Comparison of NG SI engines and dual-fuel engines is performed. Performances and emissions of gas automotive engines are presented. World natural gas reserves, natural gas production physical and chemical properties of typical natural gas, natural gas vehicles and refuelling stations in the world, schematic of CNG fuelling installation of IVth and Vth generation, combustion system, natural gas admission and control in DF NG engine, schematic of ADCR engine adapted to CNG fuelling are presented in the paper.