Multiple variable valve lift apparatus
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsSoo Hyung Woo, Heechang Oh, Seung Kook Han, Ju Hun Lee, Wootae Kim
Life of this patent
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Abstract
A multiple variable valve lift apparatus disposed at an intake part and an exhaust part of an engine includes: a moving cam rotating together with a camshaft, being movably disposed in an axial direction of the camshaft, and forming a plurality of cams for realizing valve lift to be different from each other and a cam guide protrusion; an operating unit selectively guiding the cam guide protrusion so as to move the moving cam in an axial direction of the camshaft; a controller controlling an operation of the operating unit; and a valve opening/closing unit opened/closed by contacting any one among the plurality of cams.
Claims9
A multiple variable valve lift apparatus, which is provided at an intake part and an exhaust part of an engine, comprising:
- a moving cam rotating together with a camshaft, being movably disposed in an axial direction of the camshaft, and forming a plurality of cams for realizing valve lift to be different from each other and a cam guide protrusion;
- an operating unit selectively guiding the cam guide protrusion so as to move the moving cam in an axial direction of the camshaft;
- a controller controlling an operation of the operating unit;
- and
- a valve opening/closing unit opened/closed by contacting one of the plurality of cams,
- wherein a plurality of cams of the intake part comprises:
- an intake part first cam disposed so as to have a phase for retarding open timing of an intake valve from a timing of completing exhaust;
- an intake part second cam disposed so as to have a phase for opening the intake valve after the timing of completing exhaust;
- and
- an intake part third cam disposed so as to have a phase for advancing open timing of the intake valve from the timing of completing exhaust.
Dependencies are inferred from the claim text.