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US 2014/0230762 A1Published application
Control device for internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorToyokazu Nakashima
Life of this patent
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Abstract
An electronic control device for controlling an internal combustion engine reduces operation amounts of a high-pressure fuel pump and a vacuum pump, which are auxiliary devices driven by drive force of an intake camshaft, when a rotor of a variable valve timing mechanism is rotated to a lock phase in the phase advancing direction at the engine starting. Thus, the rotor rotates to the lock phase quickly and is fixed to the lock phase.
Claims9
A control device for an internal combustion engine, comprising:
- a hydraulically-driven variable valve timing mechanism, which has a housing rotating in conjunction with rotation of a crankshaft and a rotor connected to a camshaft and which changes valve timing by changing a relative rotational phase of the rotor with respect to the housing by using a hydraulic pressure;
- a lock mechanism for fixing the relative rotational phase of the rotor with respect to the housing to a locked phase by inserting a lock pin into a lock hole;
- and
- an auxiliary device driven by drive force of the camshaft,
- wherein if the rotor is not fixed by the lock mechanism at the engine starting, the rotor is rotated to the lock phase in the phase advancing direction and the rotor is fixed by the lock mechanism, and
- an operation amount of the auxiliary device is reduced when the rotor is rotated to the lock phase in the phase advancing direction at the engine starting.
3 more elements
Dependencies are inferred from the claim text.