Continuous variable valve lift apparatus

Abstract

A continuously variable valve lift (CVVL) device capable of adjusting valve lift, valve opening and closing duration, and valve timing, comprising a cam driven to rotate by a camshaft, a first shaft with a predetermined radius, and a radius smaller than the first shaft radius and connected to the first shaft so that the first shaft is located at another position corresponding to the rotation of the second shaft, the second shaft moves up and down by the rotation of the cam and is connected to the first shaft to move according to the position of the first shaft The roller, the first arm rotatably connected to the second shaft to move under the action of the roller, and the second arm rotatably fixed to the third shaft to open and close the valve under the action of the first arm.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2006-0113490 filed in the Korean Intellectual Property Office on November 16, 2006, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to a continuously variable valve lift apparatus. More particularly, the present invention relates to a variable valve lift device having a simple scheme and enhanced performance. Background technique [0004] Generally, a continuously variable valve lift device can improve fuel consumption and engine efficiency by variably adjusting valve timing or valve lift. [0005] According to the prior art, the continuously variable valve lift device can only adjust the valve lift. [0006] That is, according to the prior art, the valve lift and the valve opening and closing duration cannot be adjusted simultaneously. [0007] Therefore, the ...

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Problems solved by technology

[0006] That is, according to the prior art, the valve lift and valve opening and closing duration cannot be adjusted simultaneously

[0007] Therefore, the optimization of fuel consumption and engine output power cannot be achieved, so a device that can simultaneously adjust the valve lift and valve opening and closing duration is being developed

[0008] However, the problem of the above-mentioned device is that the scheme adopted is relatively complicated, the efficiency is low, and the manufacturing cost increases

[0009] In addition, according to the prior art continuously variable valve lift device, there is a problem that if the valve lift is decreased, the decrease of the valve opening speed hinders the intake air flow, which lowers the engine efficiency.

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