000			01848nab a2200205 4500
005			20260520002831.0
008			260224s2010 xxu
245	0	0	_aFuel penalty comparison for (electrically) heated catalyst technology
260			_a _b _cene./feb. 2010
270			_a05/07/2010 ; 05/07/2010
300			_a8 p. ; 47-54
520			_aTranscripción del resumen del autor. The conversion efficiency of three way catalytic converters is mainly defined by the temperature range wherein they are operating. Traditionally, ignition retard has been used to reduce the light-off time of the catalyst. This is however associated with a fuel penalty. With increasing vehicle electrification, electrically heating facilities present an alternative, especially for hybrid vehicles. Nevertheless, system complexity of hybrid vehicles prevents engineers to evaluate possible heating technologies and their corresponding fuel penalty with respect to traditional solutions. This paper evaluates the application of an electrically heated catalyst on a hybrid vehicle equipped with a Natural Gas (NG) engine. The effect of heating power on light-off time and fuel penalty is determined, using analysis techniques emerging from integrated powertrain control. By means of a case study, the importance of an integral approach is explained by comparing the fuel penalty and conversion efficiency improvement of electric heating with that of ignition retard. In this process, a mix of simulation and test data were combined, forming the foundations for future control developments of a suitable light-off strategy.
581			_a1
773	0		_tOil and Gas Science and Technology _g65
942			_cARTICULO
100	1		_aKessels, J.T.B.A. _943438
100	1		_aFoster, D.L. _943439
100	1		_aBleuanus, W.A.J. _943440
999			_c171724 _d171724