Fuel vapour purge control system for vehicles with i.c. engines

The engine 200, fuel tank 210 and vapour storage device, eg carbon canister, 230 are connected in a thee-way connection via a valve assembly 300 such that the engine can be selectively isolated by a purge control valve 270 and the fuel tank 210 can be selectively isolated by a fuel tank control valv...

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Bibliographische Detailangaben
Hauptverfasser:	DAVID CHESTER WASKIEWICZ, DOUGLAS JOSEPH MANCINI, PATRICK JOSEPH CURRAN, JAE DOO CHUNG
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 engine 200, fuel tank 210 and vapour storage device, eg carbon canister, 230 are connected in a thee-way connection via a valve assembly 300 such that the engine can be selectively isolated by a purge control valve 270 and the fuel tank 210 can be selectively isolated by a fuel tank control valve 250. The operation of both valves 250, 270 is co-ordinated by an electronic controller 120 eg fuel vapour storage is enabled when the pressure inside the fuel tank exceeds a predetermined value and fuel vapour purging is enabled when the controller senses (eg from the end of the engine adaptive learning cycle, ambient temperature, barometric pressure etc) that conditions for purging are met. By isolating the fuel tank during purging of the carbon canister, vapour spikes into the engine are eliminated, thus preventing engine stalls. Also, the durability of the canister is improved because the vapours are repeatedly stored and purged in opposite directions. The system is particularly suitable for DISI (direct injection spark ignition) or HEV (hybrid electric vehicle) engines which require a shorter fuel vapour purge cycle.