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Variable compression ratio device

A technology of compression ratio and high compression ratio, which is applied in the field of variable compression ratio devices for vehicles, and can solve problems such as failure to maintain a predetermined compression ratio

Inactive Publication Date: 2020-04-24
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, it has been found that in the variable compression device according to the related art, when the oil is compressed by the force applied to the piston, the volume of the oil chamber for storing the oil changes, thereby changing the position of the piston, so that the predetermined compression cannot be maintained. Compare

Method used

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  • Variable compression ratio device
  • Variable compression ratio device
  • Variable compression ratio device

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Embodiment Construction

[0042] The following description is merely exemplary in nature, and is not intended to limit the present disclosure, application, or usage. It should be understood that throughout the drawings, corresponding reference numerals indicate the same or corresponding parts and features.

[0043] Reference figure 1 with figure 2 A variable compression ratio device according to one form of the present invention includes: a connecting rod 12 having a large end connected to the crankshaft 11 and a small end connected to the piston 13 through a piston pin 14; an eccentric cam 21 , Rotatably installed at the small end of the connecting rod 12 and the piston pin 14 eccentrically passes through the eccentric cam 21 from the center of rotation; and the low-pressure outer plate 23 and the high-pressure outer plate 24 are respectively fastened to the two eccentric cams 21 A part of the side surface protrudes outward, and is selectively fastened to the connecting rod 12 according to the compressi...

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Abstract

A variable compression ratio device is provided and may include a connecting rod having a large end portion link-connected to a crankshaft and a small end portion link-connected to a piston by a piston pin, an eccentric cam rotatably installed at the small end portion of the connecting rod and at which the piston pin eccentrically passes through a rotation center, and an low-pressure outer plate and an high-pressure outer plate engaged with both side surfaces of the eccentric cam, formed to partially protrude outward, and selectively engaged with the connecting rod according to a compression ratio. In addition, the low-pressure outer plate and the high-pressure outer plate are selectively engaged with the connecting rod by a controller according to a supply direction of a hydraulic pressure.

Description

[0001] Cross references to related applications [0002] This application claims the priority and rights of the Korean patent application filed on October 16, 2018 with the application number 10-2018-0123321, which is incorporated herein by reference in its entirety. Technical field [0003] The present disclosure relates to a variable compression ratio device for a vehicle having a piston pin connecting a connecting rod and a piston. Background technique [0004] The statements in this section only provide background information related to the present disclosure and do not constitute prior art. [0005] A piston installed in each cylinder block of the engine reciprocates between a predetermined top dead center and a bottom dead center to compress the air or mixture introduced into the cylinder block. [0006] Generally, the crankshaft, the connecting rod, and the piston in the engine are all formed into a predetermined shape and connected to each other at a fixed position so as to hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B75/04F02D15/02
CPCF02B75/045F02D15/02F16C7/06F16C2360/22F16C23/10F02B75/048F01M1/06F01M1/16F16K11/07F16K3/314F01M2001/066F15B15/06F16H53/02F15B15/12
Inventor 崔命植
Owner HYUNDAI MOTOR CO LTD