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Multiple variable valve lift apparatus

Inactive Publication Date: 2015-03-12
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

The present invention is a multiple variable valve lift system that improves both fuel consumption and noise vibration performance. The system has two cam lovers that work together to achieve a predetermined valve lift at high and low speeds, while also improving engine efficiency. This allows for better performance and driving experience at both high and low speeds.

Problems solved by technology

In addition, mechanical friction is increased according to the valve lift is increased such that fuel consumption may be deteriorated.

Method used

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  • Multiple variable valve lift apparatus
  • Multiple variable valve lift apparatus
  • Multiple variable valve lift apparatus

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Embodiment Construction

[0022]Reference will now be made in detail to various embodiments of the present invention(s), examples of which are illustrated in the accompanying drawings and described below. While the invention(s) will be described in conjunction with exemplary embodiments, it will be understood that the present description is not intended to limit the invention(s) to those exemplary embodiments. On the contrary, the invention(s) is / are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.

[0023]An exemplary embodiment of the present invention will hereinafter be described in detail with reference to the accompanying drawings.

[0024]FIG. 1 is a schematic diagram of a multiple variable valve lift apparatus according to an exemplary embodiment of the present invention.

[0025]As shown in FIG. 1, a multiple variable valve...

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Abstract

A multiple variable valve lift apparatus connected with a valve opening and closing unit which is adapted to rolling-contact one end thereof with a cam and is operated to open or close by a rotation of the cam, and operating to select the cam which is rolling-contacted with the valve opening and closing unit for changing a valve lift, may include a normal cam rolling-contacting with the valve opening and closing unit so as to realize a normal lift of a predetermined valve, and a low cam rolling-contacting with the valve opening and closing unit so as to realize a valve lift which is lower and longer than the normal lift realized by the normal cam, wherein the normal cam or the low cam is selectively rolling-contacted to the valve opening / closing unit according to a driving state.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]The present application claims priority to Korean Patent Application No. 10-2013-0107885 filed on Sep. 9, 2013, the entire contents of which is incorporated herein for all purposes by this reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a multiple variable valve lift apparatus. More particularly, the present invention relates to a multiple variable valve lift apparatus for improving fuel consumption.[0004]2. Description of the Related Art[0005]Generally, an internal combustion engine receives fuel and air into a combustion chamber and generates power by combusting the fuel and the air. Herein, an intake valve is operated by drive of a camshaft, and air flows into the combustion chamber during when the intake valve is open. In addition, an exhaust valve is operated by drive of a camshaft, and air is exhausted from the combustion chamber while the exhaust valve is open.[0006]Optimal ...

Claims

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Application Information

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IPC IPC(8): F01L1/34
CPCF01L1/34F01L13/0036F01L2013/0052F01L2013/101F01L1/12F01L1/18
Inventor CHOI, BYONG YOUNGSHIN, GEE WOOKWOO, SOO HYUNGKONG, JIN KOOK
Owner HYUNDAI MOTOR CO LTD
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