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Validation of the fuel saving potential of downsized and supercharged hybrid pneumatic engines using vehicle emulation experiments / Christian Dönitz in Transactions of the ASME . Journal of engineering for gas turbines and power, Vol. 133 N° 9 (Septembre 2011) 

Public ISBD [article]  in Transactions of the ASME . Journal of engineering for gas turbines and power > Vol. 133 N° 9 (Septembre 2011) . - 13 p. Titre : Validation of the fuel saving potential of downsized and supercharged hybrid pneumatic engines using vehicle emulation experiments Type de document : texte imprimé Auteurs : Christian Dönitz, Auteur ; Christoph Voser, Auteur ; Iulian Vasile, Auteur Année de publication : 2012 Article en page(s) : 13 p. Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Combustion  Internal  combustion  engines  Pneumatic  systems  Road  vehicles Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The pneumatic hybridization of power trains is especially effective when it is combined with strong downsizing and supercharging of spark ignited engines. This paper presents measurement results obtained from such an engine. Specifically, performance measurements for all additional engine modes are shown. The pneumatic motor mode and the pneumatic pump mode are individually optimized over their whole operating range for maximum recuperation efficiency. Jointly with the conventional combustion mode and the pneumatic supercharged mode, they are implemented in one engine control system, thereby enabling the switching between all modes. A dynamometer simulates the longitudinal dynamics of two series production vehicles for the modified engine. This experimental setup, defined as emulation, is used to accurately measure the engine's fuel consumption in the MVEG-95 and federal test procedure (FTP) drive cycles. Causal and noncausal energy management strategies are presented and used for choosing the engine mode during a drive cycle. Fuel savings of up to 35% are measured when comparing the modified engine to the vehicles' standard engines with the same rated power. Hybrid pneumatic vehicles (HPVs) may prove to be a viable alternative to hybrid electric vehicles since fuel savings and driveability are comparable, while the added cost is expected to be substantially lower for HPVs. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JETPEZ00013 [...] [article] Validation of the fuel saving potential of downsized and supercharged hybrid pneumatic engines using vehicle emulation experiments [texte imprimé] / Christian Dönitz, Auteur ; Christoph Voser, Auteur ; Iulian Vasile, Auteur . - 2012 . - 13 p. Génie Mécanique Langues : Anglais (eng) in Transactions of the ASME . Journal of engineering for gas turbines and power > Vol. 133 N° 9 (Septembre 2011) . - 13 p. Mots-clés : Combustion  Internal  combustion  engines  Pneumatic  systems  Road  vehicles Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The pneumatic hybridization of power trains is especially effective when it is combined with strong downsizing and supercharging of spark ignited engines. This paper presents measurement results obtained from such an engine. Specifically, performance measurements for all additional engine modes are shown. The pneumatic motor mode and the pneumatic pump mode are individually optimized over their whole operating range for maximum recuperation efficiency. Jointly with the conventional combustion mode and the pneumatic supercharged mode, they are implemented in one engine control system, thereby enabling the switching between all modes. A dynamometer simulates the longitudinal dynamics of two series production vehicles for the modified engine. This experimental setup, defined as emulation, is used to accurately measure the engine's fuel consumption in the MVEG-95 and federal test procedure (FTP) drive cycles. Causal and noncausal energy management strategies are presented and used for choosing the engine mode during a drive cycle. Fuel savings of up to 35% are measured when comparing the modified engine to the vehicles' standard engines with the same rated power. Hybrid pneumatic vehicles (HPVs) may prove to be a viable alternative to hybrid electric vehicles since fuel savings and driveability are comparable, while the added cost is expected to be substantially lower for HPVs. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JETPEZ00013 [...]