Cooling an i.c. engine turbocharger using an electrically driven supercharger

The invention relates to cooling the turbocharger after the engine has been shut off. The engine (202) has a two-stage air charge boosting system including an exhaust gas driven turbocharger (220) for compressing inlet air, an electrical supply system (230), an air passageway between (265) the air i...

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Bibliographische Detailangaben
1. Verfasser:	WILLIAM MARC EDWARD BROTHERTON
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL CONTROLLING COMBUSTION ENGINES GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INTERNAL-COMBUSTION PISTON ENGINES LIGHTING MECHANICAL ENGINEERING SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS
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Beschreibung
Zusammenfassung:	The invention relates to cooling the turbocharger after the engine has been shut off. The engine (202) has a two-stage air charge boosting system including an exhaust gas driven turbocharger (220) for compressing inlet air, an electrical supply system (230), an air passageway between (265) the air inlet system (205) and the exhaust gas system (211), and a controller (240) for controlling the operation of the air charge boosting system (218,220). The turbocharger (220) has an exhaust gas driven impeller (226). The air charge boosting system includes an electrically driven supercharger (18). The controller (240) is arranged when the engine (202) is stopped to operate the supercharger (218) to force air (260) through the air passageway (265) from the air inlet system (205) into the exhaust gas system (211) in order to cool the turbocharger impeller (226). The air passageway (265) is preferably provided by an exhaust gas recirculation system (80).