A study of reduction of CO, HC and NOx for small gasoline engine by using Butanol/Iso-Octane/Toluene blended fuels

Abstract

The component proportion of gasoline varies depending on the mining time of crude oil, the mining place, and so on. Because it has effects on the engine performance and emission characteristics, studying the effects of the fuel properties on combustion characteristics is important. And a study of power generation for small gasoline engine by using alcohol fuel is extremely important from the viewpoint of stable power supply in the event of a disaster. These points, this experiment has been conducted to examine the reduction of combustion products of power generation for small gasoline engine by using standard fuel with Iso-Octane and Toluene in wide open throttle and throttle opening 2/3, especially about the effects of fuel properties by changing the addition ratio of 1-Butanol, 2-Butanol, Isobutanol, and t-Butanol with a high addition range. The main conclusions are as follows: 1) Standard fuel with Iso-Octane and Toluene is sufficiently possible to use as a alternative standard fuel of power generation for small gasoline engine. 2) It is possible to reduce CO and HC emissions remarkably compared with gasoline by addition of 1-Butanol, 2-Butanol, Isobutanol, and t-Butanol. 3) The CO and HC emissions of 1-Butanol can be reduced more than 31.6 % and 17.5 %, respectively compared with 2-Butanol, Isobutanol, and t-Butanol in the no- and low/medium load ranges. 4) 1-Butanol is most effective for reduction of combustion products when adding each of 1-Butanol, 2-Butanol, Isobutanol, and t-Butanol to standard fuel. 5) It is possible to control CO emissions at a low level, and the reduction of HC and NOx emissions can accomplish by controlling the addition ratio of 1-Butanol in the medium/high load range.