Abstract
► Finds sensitivity in emissions factors for motorcycles depending on the measurement techniques used. ► Compares actual emissions from motorcycles in Edinburgh and finds divergence from official standards dependent on driving cycle deployed. ► Three different measurement approach Onboard, Chassis Dynamometer, Micro simulation are applied for emission measurement.
On board, chassis dynamometer, and traffic micro-simulation emission measurement approaches are common ways of determining vehicle emission factors. Results from these various approaches are, however, significantly affected by factors such as the driving cycle, and engine size used. These variations are examined. Significant deviations in emission factors from regulatory standard are found for different driving cycle conditions and engine sizes for motorcycles in Edinburgh. Emissions of CO and HC measured using a chassis dynamometer over the Edinburgh motorcycle driving cycle, are found to differ from the results when using other measurement approaches.