Multistage variable valve lift apparatus, system and engine
AssigneeHyundai Motor Company
InventorsSoo Hyung Woo, Jong Hyeok Choi, Young Hong Kwak, Byong Young Choi, Jin Kook Kong, Gee Wook Shin
Life of this patent
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Abstract
A multistage variable valve lift apparatus includes: a camshaft; a plurality of cams slidably provided on the camshaft and each including a cam base with a guide projection and a cam lobe; a solenoid unit that includes an operating rod with a guide slot into which the guide projection is selectively inserted; and a valve opening/closing portion that comes into selective contact any one of the plurality of cams.
Claims17
A multistage variable valve lift apparatus comprising:
- a camshaft;
- a plurality of cams slidably provided on the camshaft and each including a cam base with a guide projection and a cam lobe;
- a solenoid unit that comprises an operating rod with a guide slot into which the guide projection is selectively inserted;
- and
- a valve opening/closing portion that comes into selective contact any one of the plurality of cams,
- wherein the plurality of cams, the solenoid unit, and the valve opening/closing portion constitute a single variable valve unit,
- wherein two variable valve units are provided for each cylinder, and
- wherein each of the variable valve units provided in the cylinder has a different number of cams.
A multistage variable valve lift apparatus comprising:
- a camshaft;
- a plurality of cams slidably provided on the camshaft and each including a cam base with a guide projection and a cam lobe;
- a solenoid unit that comprises an operating rod with a guide slot into which the guide projection is selectively inserted;
- and
- a valve opening/closing that comes into selective contact any one of the plurality of cams,
- wherein the plurality of cams, the solenoid unit, and the valve opening/closing portion constitute a single variable valve unit,
- wherein two variable valve units are provided for each cylinder,
- wherein the guide projection is inclined so as to connect the cam bases of the neighboring cams, and
- wherein each guide projection comprises an operating guide projection adapted to move the cams in one direction and a reverse guide projection formed in the opposite direction of the operating guide projection.
A multistage variable valve lift system comprising:
- a camshaft;
- a plurality of cams slidably provided on the camshaft and each including a cam base with a guide projection and a cam lobe;
- a solenoid unit that comprises an operating rod with a guide slot into which the guide projection is selectively inserted;
- and
- a valve opening/closing portion that comes into selective contact with any one of the plurality of cams,
- wherein the plurality of cams, the solenoid unit, and the valve opening/closing portion constitute a single variable valve unit,
- wherein two variable valve units are provided for each cylinder, and
- wherein each of the variable valve units provided in the cylinder has a different number of cams.
A multistage variable valve lift system comprising:
- a camshaft;
- a plurality of cams slidably provided on the camshaft and each including a cam base with a guide projection and a cam lobe;
- a solenoid unit that comprises an operating rod with a guide slot into which the guide projection is selectively inserted;
- and
- a valve opening/closing portion that comes into selective contact with any one of the plurality of cams,
- wherein the plurality of cams, the solenoid unit, and the valve opening/closing portion constitute a single variable valve unit,
- wherein two variable valve units are provided for each cylinder,
- wherein the guide projection is inclined so as to connect the cam bases of the neighboring cams, and
- wherein each guide projection comprises an operating guide projection adapted to move the cams in one direction and a reverse guide projection formed in the opposite direction of the operating guide projection.
Dependencies are inferred from the claim text.