Browse Publications Technical Papers 2019-24-0146
2019-09-09

Strive for Zero Emission Impact from Hybrid Vehicles 2019-24-0146

Since several decades, passenger cars and light duty vehicles (LDV) reach full pollutant conversion during warm up conditions; the major challenge has been represented by the cold start and warming up strategies. The focus on technology developments of exhaust after treatment systems have been done in the thermal management in order to reach the warm up conditions as soon as possible. A new challenge is now represented by the Real Driving Emission Regulation as this bring more various, and not any longer cycle defined, Cold Start Conditions. On the other hand, once the full conversion has been reached, it would be beneficial for many EATS components if the exhaust gas temperature could be lowered. To take significant further emission steps, approaching e.g. zero emission concepts, we investigate to bring in electrical heating catalyst (EHC) and emission trap approaches. The clear goal is to have the right temperature in the right place at the right time. Several approaches have been investigated, for example innovative and smart EATS architecture combined with EHC and active control to reach almost zero emission even during cold start. HEV applications are introduced in a rapid pace increasing the complexity of the emission control but also allowing for more possibilities to support the emission strategies including an EATS design supported by power. Volvo Car Corporation and Continental Emitec have, with promising results, investigated alternative EATS designs and here considered embedding the mentioned emission technologies. The balance with vehicle properties (e.g. fuel consumption) is here of course important.

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