CONTROL DEVICE OF ENGINE WITH VARIABLE VALVE TIMING MECHANISM

An engine includes a variable valve timing (VVT) mechanism that changes an opening timing or a closing timing of at least one of an intake valve or an exhaust valve in accordance with an operating region of the engine, and an oil jet that injects oil in a piston direction under a pressure of a first...

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Bibliographische Detailangaben
Hauptverfasser:	Nishio, Takafumi, Inoki, Toshiki, Nishimoto, Toshiaki
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ENGINE PLANTS IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	An engine includes a variable valve timing (VVT) mechanism that changes an opening timing or a closing timing of at least one of an intake valve or an exhaust valve in accordance with an operating region of the engine, and an oil jet that injects oil in a piston direction under a pressure of a first predetermined oil pressure or more. The control device of the engine controls supply of an oil pressure to the VVT mechanism in such a manner that an upper limit of an oil pressure used by the VVT mechanism is set to be lower than a first predetermined oil pressure and an operating speed of the VVT mechanism is high in a direction in which an overlap amount between open periods between an intake valve and an exhaust valve increases and is low in a direction in which the overlap amount decreases.