EXHAUST DEVICE OF MULTI-CYLINDER ENGINE

PROBLEM TO BE SOLVED: To provide an exhaust device of a multi-cylinder engine which can activate catalyst at an earlier stage while increasing engine output through the utilization of ejector effect.SOLUTION: The device comprises independent exhaust passages 53 which are respectively connected to ex...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	YOKOTA KAZUYA, FUJII MOTOKIMI, YAMAGATA NAOYUKI, SASAKI TATSUNORI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL CONTROLLING COMBUSTION ENGINES ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL 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 MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an exhaust device of a multi-cylinder engine which can activate catalyst at an earlier stage while increasing engine output through the utilization of ejector effect.SOLUTION: The device comprises independent exhaust passages 53 which are respectively connected to exhaust ports 18, a flow passage area variable valve 58 which can change a flow passage area of the independent exhaust passage 53 and a flow passage area variable valve drive means 58b. In a low speed region R1, while an exhaust valve 20 is opened during an overlap period of an intake valve 19 and exhaust valve 20 and the flow path area of a high speed side passage 53 is restricted, the intake valve 19 and exhaust valve 20 are overlapped so that intake air passes through a cylinder 12 to blow through an exhaust port 18 when catalyst is inactive therein. On the other hand, when the catalyst is active, the overlap period is made shorter than when the catalyst is inactive.