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Hydraulic motor driving variable compression ratio piston

A hydraulic motor, driven technology, applied in the direction of piston, engine components, engine control, etc., can solve the problems of complex mechanism structure, poor manufacturability, and high research and development cost, and achieve the effect of simple mechanism structure, low manufacturing cost, and compact structure

Inactive Publication Date: 2017-03-08
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to overcome the problems existing in the prior art such as complex mechanism structure, many parts, poor manufacturability, and high research and development costs, and proposes a hydraulic motor-driven variable compression ratio piston

Method used

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  • Hydraulic motor driving variable compression ratio piston
  • Hydraulic motor driving variable compression ratio piston
  • Hydraulic motor driving variable compression ratio piston

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Embodiment Construction

[0046] specific implementation plan

[0047] The present invention is described in detail below in conjunction with accompanying drawing:

[0048] refer to figure 1 and figure 2 , the piston is divided into two parts: the top of the piston 1 and the skirt 10 of the piston along the section. A hydraulic motor and a runner 3 are installed in the cavity formed by the two parts. Two oil passages are drilled in the skirt 10 of the piston. The hydraulic motor provides an inlet and outlet oil passage, and there are connecting rods in four circular holes on the outer wall of the piston top 1 for fastening the connection of the spring 2 .

[0049] refer to Figure 8 and Figure 9 , the center of the top section of the piston is a large cavity, and four columnar rods are evenly distributed around the bottom of the cavity. The helical plates of the wheels are in line contact so that the piston crown 1 moves relative to the piston skirt 10 .

[0050] refer to Figure 14 , Figure...

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Abstract

The invention discloses a hydraulic motor driving variable compression ratio piston. The hydraulic motor driving variable compression ratio piston comprises a piston top, a piston skirt, a hydraulic motor mechanism, a rotating wheel, a speed reducing mechanism and an access port oil way; the piston top and the piston skirt respectively have cavities; the hydraulic motor mechanism is put in the cavity of the piston skirt; the rotating wheel is positioned in the piston top; four laps of spiral plates on the rotating wheel are matched with four spiral projections of the piston top; the contact part between the hydraulic motor and the rotating wheel is the speed reducing mechanism consisting of a driving gear, a planet gear and an inner gear; the hydraulic motor mainly consists of a hydraulic base, a hydraulic blade, a hydraulic baffle plate, a sealing spring and an elliptic cavity of the piston skirt; pressure oil enters the elliptic oil cavity from an oil inlet way, so that the hydraulic blade rotates to drive rotation of the rotating wheel; and under the effect of a guide rod, the piston top moves corresponding to the piston skirt to change an engine compression ratio.

Description

technical field [0001] The invention relates to a vehicle engine piston, more specifically, the invention relates to a hydraulic motor-driven variable compression ratio piston. Background technique [0002] The compression ratio is the ratio of the total volume of the cylinder to the volume of the combustion chamber. It indicates the degree of compression of the gas in the cylinder when the piston moves from the bottom dead center to the top dead center. It is an important parameter to measure the performance of the engine and the most important factor affecting the efficiency of the engine. one. Generally speaking, the higher the compression ratio, the better the performance of the engine. For traditional engines, the compression ratio is fixed once it is designed, because the volume of the combustion chamber and the working volume of the cylinder are fixed parameters. The compression ratio of modern automobile engines is generally 8-12 for gasoline engines, and 12-22 for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/00F02D15/04F02B75/04
CPCF02B75/044F02D15/00F02D15/04F02F3/0015F02D2700/03
Inventor 苏岩朱振华解方喜郭淑芳王耀东邵珠杰石卜从赵海平冯爽于岐
Owner JILIN UNIV
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