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Variable Compression Ratio Device

A compression ratio, variable technology, applied in the direction of the valve drive, bearing, valve details, etc., can solve the problems of increased engine weight, complex design, difficult to change the compression ratio, etc., to reduce friction, reduce weight, improve The effect of durability

Inactive Publication Date: 2017-06-20
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, prior art variable compression ratio devices require power sources such as multiple links and electric motors to change the top dead center of the piston
Therefore, the weight of the engine is increased due to the weight of the linkage and the motor, and a complex design is required to prevent interference of multiple linkages
Also, it can be difficult to change the compression ratio without easily changing the volume of compressed air

Method used

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Examples

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Embodiment Construction

[0028] Hereinafter, an exemplary embodiment of the present disclosure will be described in detail with reference to the accompanying drawings.

[0029] The exemplary embodiments described in this specification and the drawings are merely exemplary embodiments of the present disclosure. It should be understood that there may be various modifications and equivalents included within the spirit of the present disclosure.

[0030] The drawings and description are to be regarded as illustrative in nature and not restrictive. Throughout this specification, like reference numerals refer to like elements.

[0031] Also, in the drawings, the size and thickness of each element may be depicted for better understanding and convenience of description, but the present disclosure is not limited thereto, and the thickness of layers, films, panels, regions, etc. may be exaggerated for clarity.

[0032] Furthermore, throughout this specification, unless expressly stated to the contrary, the wo...

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Abstract

A variable compression ratio device mounted to an engine, the engine rotating a crankshaft using a combustion force of a gas mixture and a piston, the variable compression ratio device changing a compression ratio of the mixture and including a connecting rod including a small end rotatably connected to the piston and a big end formed with a circular hole to be eccentrically rotatably connected to the crankshaft, a crank pin provided in the crankshaft, an eccentric cam provided to be concentrically rotatable in the hole of the big end and having a crank pin mounting hole eccentrically inserted with the crank pin to be rotatably connected, and a cam rotation unit provided inside the eccentric cam and rotating the eccentric cam in a clockwise or counterclockwise direction in a hole of the big end by a selectively supplied hydraulic pressure.

Description

[0001] Cross-references to related applications [0002] This application claims the benefit of priority from Korean Patent Application No. 10-2015-0177014 filed with the Korean Intellectual Property Office on December 11, 2015, the entire contents of which are hereby incorporated by reference. technical field [0003] The present disclosure relates to a variable compression ratio device. More particularly, the present disclosure relates to a variable compression ratio device that changes a compression ratio by changing a volume of a combustion chamber. Background technique [0004] In general, the thermal efficiency of a heat engine increases as the compression ratio becomes higher. Here, the compression ratio refers to the volume ratio of air compressed in the cylinder by the piston. That is, if the volume of the combustion chamber changes, the compression ratio can change. [0005] By changing the compression ratio according to the operating state of the engine, the fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B75/04F02D15/04F01L1/04
CPCF01L1/04F02B75/04F02D15/04F02B75/045F16C7/06F16C9/04F16C23/10F02D15/02F02B75/048
Inventor 崔命植
Owner HYUNDAI MOTOR CO LTD
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