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Direct acting variable valve lift apparatus

a technology of variable valve and lift apparatus, which is applied in the direction of valve arrangement, non-mechanical valve, machines/engines, etc., can solve the problems of complex structure and movement of latching pins, and achieve the effect of smooth oil supply and simplified structur

Inactive Publication Date: 2013-10-17
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This solution simplifies the structure by eliminating the need for additional devices, allowing for efficient and controlled valve lift variation without excessive complexity, ensuring reliable operation in both low and high lift modes.

Problems solved by technology

However, the variable valve lift apparatus needs three latching pins 10, 20, and 30, and an additional stopper 50 is needed to prevent the movement of the latching pin such that the structure is complicated.

Method used

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  • Direct acting variable valve lift apparatus
  • Direct acting variable valve lift apparatus
  • Direct acting variable valve lift apparatus

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Embodiment Construction

[0042]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 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.

[0043]The present invention relates a direct acting variable valve lift apparatus, and FIGS. 1A and 1B and FIGS. 2A and 2B illustrate cross-sectional views of an exemplary variable valve lift apparatus according to various embodiments of the present invention.

[0044]A variable valve apparatus according to various embodiments of the pre...

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Abstract

The present invention provides a variable valve lift apparatus including an outer body in which a hole is formed horizontally, and that moves upward / downward while slidingly contacting a high cam, an inner body that is inserted in the outer body, a hole is formed in steps such that the hole of the inner body is connected with the hole of the outer body, and moves upward / downward while slidingly contacting a low cam, a latching device that is inserted in the holes of the outer body and the inner body, and causes the movement of the outer body to be selectively dependent on the movement of the inner body, a plate that is located at a side of the latching device such that oil discharge from the outer body can be prevented, an upper seat that partially covers the inner body, and in which an oil passage is formed, and a lost motion spring that is located in the upper seat and provides the outer body with elastic force.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to and the benefit of Korean Patent Application Nos. 10-2010-0121619 and 10-2010-0121620 filed Dec. 1, 2010, the entire contents of which application is incorporated herein for all purposes by this reference.BACKGROUND OF INVENTION[0002]1. Field of Invention[0003]The present invention relates to a variable valve lift apparatus. More particularly, the present invention relates to a variable valve lift apparatus in which a latching pin moves inside an outer body and an inner body, and the outer body and the inner body are formed in steps such that the latching pin can be blocked without additional devices, or such that the movement of the outer body is selectively dependent on the movement of the inner body, so valve lift is varied.[0004]2. Description of Related Art[0005]Generally, an internal combustion engine generates power by burning fuel and air input into a combustion chamber. Intake valves are operate...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01L1/24
CPCF01L1/2411F01L1/143F01L13/0036
Inventor CHOI, MYUNGSIK
Owner HYUNDAI MOTOR CO LTD