2016 Volume 47 Issue 2 Pages 331-337
In the conventional type approval test method of fuel consumption for heavy-duty vehicles, the fuel consumption under the transient test cycle is calculated by integrating instant fuel consumption rate referred from look-up table of fuel consumptions measured under the steady state conditions of the engine. Therefore, transient engine performance is not considered in this conventional method. In this study, a highly accurate test method of the fuel consumption, which corrected the map-based fuel consumption rate using the transient characteristics of individual engines, was developed and validated its utility for a heavy-duty engine, complied with the Japanese 2009 emission regulation.
