PURGE VALVE CONTROL METHOD AND CONTROL DEVICE OF EVAPORATED FUEL PROCESSING DEVICE

A fuel component purged from a canister (3) of an evaporative fuel processing device is introduced as purge gas into an intake passage (7) of an internal combustion engine (1). A purge passage (5) is provided with a pair of purge valves (8A, 8B) that open and close alternately and are each duty-cont...

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Bibliographische Detailangaben
Hauptverfasser:	TAKAKI, Daisuke, TSUCHIDA, Hirofumi, TAKAHASHI, Katsuhito, SHIMOJO, Shigemasa
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF WEAPONS
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Beschreibung
Zusammenfassung:	A fuel component purged from a canister (3) of an evaporative fuel processing device is introduced as purge gas into an intake passage (7) of an internal combustion engine (1). A purge passage (5) is provided with a pair of purge valves (8A, 8B) that open and close alternately and are each duty-controlled. The opening cycle of each of the purge valves (8A, 8B) is equal to an odd multiple of ΔREF, where ΔREF represents an intake stroke interval based on the number of cylinders, and is shifted from each other by a half cycle. For example, the first opening period of the first purge valve (8A) includes a section in which an intake pulse waveform descends from a peak to a valley, and the following first opening period of the second purge valve (8B) includes a section in which the intake pulse waveform ascends from a valley to a peak. Accordingly, the influence of intake pulsation is at least partially cancelled.