Cylinder deactivation engine

a technology of cylinder deactivation and cylinder head, which is applied in the direction of machines/engines, non-mechanical valves, output power, etc., can solve the problems of excessive weight and manufacturing cost of engines, inability to achieve appropriate valve lifts according to engine speed, and increase energy costs

Inactive Publication Date: 2016-06-09
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a cylinder deactivation engine that selectively deactivates some of the cylinders and changes the valve lifts of the non-deactivated cylinders. The engine includes a hydraulic pump that generates hydraulic pressure to operate the valves and a cylinder deactivation apparatus that selectively deactivates the cylinders. The engine also includes a variable valve lift apparatus that can change the lift of the valves. The hydraulic pressure is selectively supplied to the valve lift apparatus and the cylinder deactivation apparatus. The engine can provide high lift or normal lift of the valves depending on the needs. The invention allows for improved fuel efficiency and control of engine performance.

Problems solved by technology

Recently, a cylinder deactivation apparatus of an engine that improves fuel efficiency by deactivating some of a plurality of cylinders in an engine when the engine generates small power has been developed as a result of an increase in energy cost.
However, in a cylinder deactivation engine implemented by the existing cylinder deactivation apparatuses, valves of cylinders that are not deactivated operate to normal lifts, so appropriate valve lifts according to the speed of an engine cannot be achieved.
Further, when the configuration for changing the valve lifts of cylinders that are not deactivated is complicated, the weight and manufacturing cost of an engine may be excessively increased.

Method used

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Embodiment Construction

[0031]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.

[0032]FIG. 1 is a top plan view of a variable valve lift apparatus 100 according to an exemplary embodiment of the present invention. As shown in FIG. 1, a variable valve lift apparatus according to an exemplary embodiment of the present invention includes an outer body 110, an inner body 120, a roller 130, a connecting shaft 140, and...

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Abstract

A cylinder deactivation engine may include: one or more deactivation cylinders to be selectively deactivated; one or more non-deactivation cylinders not to be deactivated; cylinder deactivation apparatuses operably connected to the deactivation cylinders and operated by hydraulic pressure to selectively implement a zero lift of a valve or valves of the deactivation cylinders; one or more variable valve lift apparatuses operably connected to the non-deactivation cylinders and operated by the hydraulic pressure to selectively change a lift of a valve of the non-deactivation cylinders; a hydraulic pump that generates the hydraulic pressure for operating the variable valve lift apparatuses and the cylinder deactivation apparatuses; and one or more oil control valves that control the hydraulic pressure from the oil pump so that the hydraulic pressure is selectively supplied to the variable valve lift apparatuses and the cylinder deactivation apparatuses.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]The present application claims priority of Korean Patent Application Number 10-2014-0175830 filed on Dec. 9, 2014, the entire contents of which application are incorporated herein for all purposes by this reference.BACKGROUND OF INVENTION[0002]1. Field of Invention[0003]The present invention relates to a cylinder deactivation engine. More particularly, the present invention relates to a cylinder deactivation engine that can change the valve lifts of cylinders that are not deactivated.[0004]2. Description of Related Art[0005]In general, an internal combustion engine is an apparatus that operates using energy from heat generated by burning a gas mixture in a combustion chamber. A multi-cylinder engine with a plurality of cylinders for increasing power and reducing noise and vibration is generally used.[0006]Recently, a cylinder deactivation apparatus of an engine that improves fuel efficiency by deactivating some of a plurality of cylinders ...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): F01L13/00F01L9/10F01L9/40
CPCF01L2013/001F01L13/0005F01L1/18F01L13/00F02D13/02F02D17/02Y02T10/12
InventorCHOI, MYUNGSIKKIM, WON GYUKWAK, YOUNG HONGKIM, WOOTAE
OwnerHYUNDAI MOTOR CO LTD