Level of gas emissions of passenger car on climb road segment

Abstract

Each island in Indonesia has its own topographical characteristics, which generally consists of plains, plateaus, hills and mountains. This topography influences vertical alignment of the roads. Gradient of vertical alignment on road construction planning is maximum 10%, but in facts it is shown that in some areas they are reached more than 10%. While the vehicle gas emission test in Indonesia currently only apply for public transport and freight cars, where the test is only performed on a flat road and in idle conditions without considering geometric aspects. Passenger cars are not subject to this test contrary to the increase of their population of about 10-15% annually which is much higher than the public transport. This research aims to determine the level of gas emissions of passenger cars on climb road segment (vertical alignment). The methods of analysis are by using distribution frequency of the vehicle gas emissions data test of passenger cars in dynamic condition on climb road segment. This research conduct with Gas Analyzer Equipment which is measured CO, CO2, HC, and Lambda (The composition of gasoline and Air). Sample of passenger cars used by two cars with the same specification and different age. The data used in this research are passenger cars speed with three variations are 30, 40 and 50 kph. The gas emissions test of passenger cars is performed on the road which have the gradient of vertical alignment is maximum 10%, and this test is regardless to the value of skid resistant, roughness and driver characteristics. The result shown that climb and slope road segment influence the level of gas emissions of passenger cars for CO and CO2 has almost the same value. The condition climb and slope road segment for Lambda 0.99 % volume, the value of CO volume is 0.35% volume and CO2 is 12.3% volume. While the content of HC has different characteristics that is when the vehicle climb, HC content lower than when the vehicle slope. When the mixed composition of fuel and air (Lambda 0.99% volume), the vehicle climbed about 11.5 ppm and when the vehicle sloped about 30.5 ppm. The ratio of HC between vehicles climbed and sloped is 1: 2.