Publisher's Synopsis
Scientific Essay from the year 2015 in the subject Engineering - Automotive Engineering, language: English, abstract: In the present work a comparative assessment has been made for the exhaust emissions of a spark ignition engine fueled with gasoline and CNG. The engine under test was operated separately by gasoline or CNG using a conversion switch. The produced hydrocarbon (HC), carbon monoxide (CO) and carbon dioxide (CO 2) of both fuels were measured at coolant temperature of 80°C, 90°C and 100°C. Tests have been conducted at full and half load operating conditions with a speed range from 1000:5000 rpm. The results showed that reducing the coolant temperature from 100°C to 80°C increased the produced hydrocarbon and carbon dioxide and reduced the carbon monoxide for both fuels at full and half load conditions. Furthermore, the CNG produced less HC, CO and CO 2 than the gasoline at full and half load operating conditions.
