Experimental study on the impact of road grade for a heavy-duty vehicle PEMS test
The effect of road slope is studied on PEMS testing of heavy-duty diesel vehicles through actual road testing and laboratory chassis dynamometer replication tests.The results show that changes in road slope directly affect the engine load state,thereby affecting fuel consumption and pollutant emissions.Although the mileage fuel consumption increases on uphill and decreases on downhill,the specific fuel consumption and CO2 emissions are not directly related to whether the vehicle is driving on a slope,and mileage based fuel consumption assessment cannot fully reflect the vehicle's energy efficiency level.NOx emissions are influenced by various factors.Downhills may result in a decrease in SCR efficiency due to a decrease in exhaust temperature,leading to an increase in emissions,or a decrease in NOx emissions due to a decrease in engine power consumption.In short,road slope is an important factor that cannot be ignored in evaluating the actual road emissions of heavy vehicles.
NETL
NSTL
万方数据
维普
