Study of diesel engine performance and emissions during a Transient Cycle applying an engine mapping-based methodology

Experimental assessment of a pre-turbo aftertreatment configuration in a single stage turbocharged diesel engine. Part 2: Transient operation

“…The response of turbocharged Diesel engines under transient operation is a topic of maximum interest for manufacturers and researchers because of its relation with real driving conditions, which are usually falling into the off-design range [1], with important influence on performance and pollutant emissions [2].…”

Analysis of the Effect of Vehicle, Driving and Road Parameters on the Transient Performance and Emissions of a Turbocharged Truck

“…The methodology employed for the estimation of performance and emissions during a transient schedule has been detailed in previous publications [15][16][17]; only a brief description is provided here, with reference to Figure 1, for the sake of completeness. As was the case with other similar mappingbased approaches developed in the past [10][11][12][13][14][18][19][20][21][22][23], the context of quasi-linear modeling [24] is, in general, followed.…”

“…The properties under test are soot, nitric monoxide (NO), and fueling (from which CO2 emissions can be directly estimated). Based on the steady-state engine testing, the engine emissions and performance were mapped applying a fourth order polynomial for every studied property with respect to the engine speed and torque [15].…”

Development of variable timing fuel injection cam for effective abatement of diesel engine emissions

“…To achieve complete and efficient combustion process with effective diesel fuel spray characteristics and fuel's mixing with air in the combustion chamber, the parameters significantly affected are fuel-injection rate, fuel nozzle orifice size and spring force and fuel-injection pressure [11][12][13]. For retarded engine, further retarded timing is not feasible with conventional fuel injection system on small engines, as there is loss of power and BSFC resulting in increase on-load smoke and heavy emission penalty on HC, CO and PM, especially in cold-start conditions on transient emission cycle [14].…”