Variable Length Connecting Rod And Variable Compression Ratio Internal Combustion Engine

A connecting rod and variable technology, applied in the direction of connecting rod, connecting rod bearing, piston rod, etc., can solve the problems of increasing the volume of the combustion chamber, reducing the mechanical compression ratio, and shortening the effective length.

Active Publication Date: 2016-06-29
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, if the effective length of the connecting rod becomes shorter, the volume of the combustion chamber when the piston is at the compression top dead center becomes larger, so the mechanical compression ratio decreases.

Method used

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  • Variable Length Connecting Rod And Variable Compression Ratio Internal Combustion Engine
  • Variable Length Connecting Rod And Variable Compression Ratio Internal Combustion Engine
  • Variable Length Connecting Rod And Variable Compression Ratio Internal Combustion Engine

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no. 2 approach

[0108] Next, refer to Figure 11 ~ Figure 17 The variable length link 6'of the second embodiment of the present invention will be explained. The configuration and operation of the variable-length link 6'of the second embodiment are basically the same as those of the variable-length link 6 of the first embodiment except for the points described below.

[0109]

[0110] Picture 11 Is a schematic representation of the variable-length link 6'of the second embodiment, and figure 2 The same three-dimensional view. In addition, Picture 12 Is a schematic representation of the variable-length link 6'of the second embodiment, and image 3 The same cross-sectional side view. In addition, Figure 13 The area where the flow direction switching mechanism 35 is installed is enlarged, and Figure 7 Cutaway side view of the same connecting rod. Figure 14 Is along Figure 13 XIV-XIV, and Figure 8 (A) A cross-sectional view of the same connecting rod.

[0111] Such as Picture 11 with Picture ...

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Abstract

The invention provides an variable length connecting rod and variable compression ratio internal combustion engine. A variable length connecting rod which can change the effective length comprises a connecting rod body, an eccentric member which is attached at the small end to the connecting rod body to be able to swivel and which changes the effective length of a variable length connecting rod when swiveled, one piston mechanism which has one hydraulic cylinder which is provided in the connecting rod body and one hydraulic piston which slides in the hydraulic cylinder, a direction switching mechanism which switches between supply and discharge of hydraulic fluid to the hydraulic cylinder, and a hydraulic fluid supply source which supplies the hydraulic cylinder with hydraulic fluid. The piston mechanism is configured so that the eccentric member swivels in one direction if hydraulic fluid is supplied to the hydraulic cylinder and so that the eccentric member swivels in the other direction if hydraulic fluid is discharged from the hydraulic cylinder.

Description

Technical field [0001] The present invention relates to a variable-length link capable of changing the effective length and a variable compression ratio internal combustion engine provided with the variable-length link. Background technique [0002] Conventionally, there have been known internal combustion engines equipped with a variable compression ratio mechanism capable of changing the mechanical compression ratio of the internal combustion engine. As such a variable compression ratio mechanism, various mechanisms have been proposed. As one of them, a mechanism that changes the effective length of a connecting rod used in an internal combustion engine (for example, Patent Documents 1 and 2). Here, the effective length of the connecting rod refers to the distance between the center of the crank accommodating opening that accommodates the crank pin and the center of the piston pin accommodating opening that accommodates the piston pin. Therefore, if the effective length of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B75/04F02D15/02F16C7/06
CPCF02B75/045F02D15/02F16C7/06F16C2360/22F16C9/04F16C23/10F16J7/00
Inventor 江崎修一木户冈昭夫加茂吉朗
Owner TOYOTA JIDOSHA KK
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