Inputs and Outputs of the Measured Engine

The tutorial uses direct injection gasoline engine in stratified-charge operation as an example which was measured with respect to the inputs and outputs illustrated in Fig. 7 and described in Tab. 1.

Fig. 7: Engine to be measured and modeled

	Name	Meaning
Inputs	Injection	End of injection [° KW]
	Ignition	Delta "ignition timing after end of injection" [° KW]
	fuel_pressure	Fuel pressure [bar]
	EGR	EGR rate [%]
	ex_cam	Closing of exhaust valves [° KW]
	in_cam	Opening of intake valves [° KW]
	SCV	Swirl control valve [ ]
Operating points	speed	Engine speed [1/min]
Operating points	load	Load; quantified by mean effective pressure [bar]
Outputs	fuel_mass	Fuel mass [kg/h]
	CoV	Engine roughness [%]
	soot	Smoke number SN [ ]
	NOx_rel	relative nitrogen oxide emission [g/kg fuel]

Tab. 1: Designation and meaning of inputs and outputs of measured engine