Variable valve device for internal combustion engine
AssigneeMitsubishi Jidosha Kogyo Kabushiki Kaisha
InventorsYusuke Kido, Shinichi Murata, Masaru Mori, Kenta Kotsuji
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Abstract
A variable valve device for an internal combustion engine includes an internal combustion engine body having a plurality of cylinders, a variable valve mechanism which is provided in the body and is switchable between at least two modes with oil pressure, a mode switching oil control valve which switches the variable valve mechanism to each mode, and a camshaft-driven mode switching oil pump which supplies an oil pressure for switching driving to the variable valve mechanism according to the switching of the mode switching oil control valve. The mode switching oil control valve is, along with the mode switching oil pump, provided in an outer wall surface of the body.
Claims9
A variable valve device for an internal combustion engine, comprising:
- an internal combustion engine body having a plurality of cylinders;
- a variable valve mechanism which is provided in the body and is switchable between at least two modes with oil pressure;
- a mode switching oil control valve which switches the variable valve mechanism to each mode;
- and
- a camshaft-driven mode switching oil pump which supplies an oil pressure for switching driving to the variable valve mechanism according to the switching of the mode switching oil control valve, the mode switching oil pump being, along with the mode switching oil control valve, provided above the camshaft in an outer wall surface of the body.
A variable valve device for an internal combustion engine, comprising:
- a camshaft that operates at least one of an exhaust valve and an intake valve, the camshaft having at least one pump driving cam formed on a periphery thereof;
- a variable valve mechanism provided in the internal combustion engine and switching between at least two operating modes by an oil pressure;
- a mode switching oil control valve which selectively switches the variable valve mechanism among the operating modes;
- and
- an oil pump provided with a plunger accommodated in a plunger housing and driven by the at least one pump driving cam and supplying the oil pressure to the variable valve mechanism in accordance with a mode of the mode switching oil control valve,
- wherein a center axis of the oil pump extends in a direction substantially perpendicular to a center axis of a camshaft and a center axis of the mode-switching oil control valve extends in a direction substantially perpendicular to the center axis of the camshaft and at an angle with respect to the center axis of the oil pump.
Dependencies are inferred from the claim text.