# US 9,752,466 B2 · Continuous variable valve duration apparatus and engine provided with the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,466 B2 - Document ID: US9752466B2 - Status: Granted - Kind: B2 - Application number: 14/923,255 - Filed: 2015-10-26 - Published: 2016-06-09 - Granted: 2017-09-05 - Earliest claimed: 2014-12-09 - Assignees: Hyundai Motor Company - Applicants: Hyundai Motor Company - Inventors: You Sang Son; Kyoung Pyo Ha; Back Sik Kim - Web page: https://patentgrep.com/patent/US9752466B2 ## CPC - F01L 1/34413: {using composite camshafts, e.g. with cams being able to move relative to the camshaft} - F01L 1/047: Camshafts - F01L 1/053: overhead type - F01L 1/356: making the angular relationship oscillate {, e.g. non-homokinetic drive} - F01L 13/0015: {for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque} - F01L 2001/0473: {Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod} - F01L 2001/0476: {Camshaft bearings} - F01L 2001/054: {Camshafts in cylinder block} - F01L 2013/0078: {by modification of cam contact point by axially displacing the camshaft} - F01L 2820/032: Electric motors - F01L: CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ## Abstract A continuous variable valve duration apparatus includes a camshaft, a plurality of wheels mounted to the camshaft, of which a wheel key is formed thereto respectively, a plurality of cam portions of which a cam and a cam key are formed thereto respectively, of which the camshaft is inserted thereto, of which relative phase angle with respect to the camshaft is variable, a plurality of inner brackets connected with the each wheel key and the each cam key, a slider housing of which the each inner bracket is rotatably inserted thereto, and rotatably configured around a hinge bracket connected to a cylinder head and a control portion selectively moving the slider housings to change relative position of a rotation center of the inner brackets. ## Claims ### Claim 1 A continuous variable valve duration apparatus comprising: a camshaft; a plurality of wheels mounted to the camshaft, of which a wheel key is formed thereto respectively; a plurality of cam portions of which a cam and a cam key are formed thereto respectively, of which the camshaft is inserted thereto, of which relative phase angle with respect to the camshaft is variable; a plurality of inner brackets connected with each wheel key and each cam key; a plurality of slider housings of which each inner bracket is rotatably inserted thereto, and rotatably configured around a hinge bracket connected to a cylinder head; and a control portion selectively moving the slider housings to change relative position of a rotation center of the inner brackets. ### Claim 2 (depends on 1) The continuous variable valve duration apparatus of claim 1, further comprising: first pins of which a wheel key slot, the each wheel key is slidably inserted thereto, is formed thereto respectively; and second pins of which a cam key slot, the each cam key is slidably inserted thereto, is formed thereto respectively, and wherein a first sliding pin hole and a second sliding pin hole, of which the first pins and the second pins are inserted thereto respectively, are formed to the inner bracket. ### Claim 3 (depends on 2) The continuous variable valve duration apparatus of claim 2, wherein the first pins and the second pins are formed as a circular cylinder shape; and the first sliding pin hole and the second sliding pin hole are formed for the first pins and the second pins to be rotated within thereto. ### Claim 4 (depends on 3) The continuous variable valve duration apparatus of claim 3, wherein the wheel key slot of the first pins and the cam key slot of the second pins are formed opposite direction. ### Claim 5 (depends on 4) The continuous variable valve duration apparatus of claim 4, wherein parts of the first sliding pin hole and the second sliding pin hole are opened for movements of the wheel key and the cam key not to be interrupted. ### Claim 6 (depends on 1) The continuous variable valve duration apparatus of claim 1, further comprising: a bearing inserted between the slider housing and the inner bracket. ### Claim 7 (depends on 1) The continuous variable valve duration apparatus of claim 1, wherein the slider housings are connected by a slider housing connecting plate. ### Claim 8 (depends on 7) The continuous variable valve duration apparatus of claim 7, wherein the control portion comprises a control shaft, and wherein a shaft hole is formed to the housing connecting plate for the control shaft to be inserted thereto, and a rotation center of the inner brackets is changed with respect to a rotation center of the camshaft according to a movement of the control shaft. ### Claim 9 (depends on 8) The continuous variable valve duration apparatus of claim 8, wherein the control portion further comprises: a control gear connected with the control shaft; and a control motor engaged with the control gear and selectively rotating the control gear. ### Claim 10 (depends on 8) The continuous variable valve duration apparatus of claim 8, wherein a hinge connecting portion hingedly connected with the hinge bracket is formed to the slider housing connecting plate. ### Claim 11 (depends on 1) The continuous variable valve duration apparatus of claim 1, wherein the wheel is connected with the camshaft through a connecting pin. ### Claim 12 An engine comprising: a camshaft; a plurality of wheels mounted to the camshaft, of which a wheel key is formed thereto respectively, and disposed corresponding to each cylinder; a plurality of cam portions of which a cam and a cam key are formed thereto respectively, of which the camshaft is inserted thereto, of which relative phase angle with respect to the camshaft is variable and disposed corresponding to the each cylinder; a plurality of inner brackets of which a first sliding pin hole and a second sliding pin hole, connected with each wheel key and each cam key are formed respectively thereto; a plurality of slider housings of which each inner bracket is rotatably inserted thereto, and rotatably configured around a hinge bracket connected to a cylinder head; first pins of which a wheel key slot, the each wheel key is slidably inserted thereto, is formed thereto respectively and rotatably inserted into the first sliding pin hole; second pins of which a cam key slot, the each the cam key is slidably inserted thereto, is formed thereto opposite to the wheel key slot respectively, and rotatably inserted into the second sliding pin hole; and a control portion selectively moving the slider housings to change relative position of a rotation center of the inner brackets. ### Claim 13 (depends on 12) The engine of claim 12, wherein parts of the first sliding pin hole and the second sliding pin hole are opened for movements of the wheel key and the cam key not to be interrupted. ### Claim 14 (depends on 12) The engine of claim 12, further comprising: a bearing inserted between the slider housing and the inner bracket. ### Claim 15 (depends on 12) The engine of claim 12, wherein the slider housings are connected by a slider housing connecting plate. ### Claim 16 (depends on 15) The engine of claim 15, wherein the control portion comprises a control shaft, and wherein a shaft hole is formed to the housing connecting plate for the control shaft to be inserted thereto, and a rotation center of the inner brackets is changed with respect to a rotation center of the camshaft according to a movement of the control shaft. ### Claim 17 (depends on 16) The engine of claim 16, wherein the control portion further comprises: a control gear connected with the control shaft; and a control motor engaged with the control gear and selectively rotating the control gear. ### Claim 18 (depends on 16) The engine of claim 16, wherein a hinge connecting portion hingedly connected with the hinge bracket is formed to the slider housing connecting plate. ### Claim 19 (depends on 12) The engine of claim 12, wherein the wheels are connected with the camshaft through a connecting pin.