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Variable compression ratio piston with limiting ring structure

A limit ring and compression ratio technology, applied to pistons, engine components, machines/engines, etc., can solve the problems of complex structure, poor reliability, and high manufacturing cost, and achieve reliable work, strong power output, and normal operation.

Pending Publication Date: 2018-02-23
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the technical problems of high manufacturing cost, poor reliability and complicated structure in the prior art, the present invention provides a variable compression ratio piston with a limiting ring structure

Method used

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  • Variable compression ratio piston with limiting ring structure
  • Variable compression ratio piston with limiting ring structure
  • Variable compression ratio piston with limiting ring structure

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Embodiment Construction

[0036] The present invention is described in detail below in conjunction with accompanying drawing:

[0037] like figure 1 As shown, the vane motor 7 is placed on the center seat of the piston skirt 5, the oil groove on the vane motor 7 is directly opposite to the oil groove of the center seat of the piston skirt, and the sealing cover plate 3 is connected to the center of the piston skirt 5 by bolts. The seat is fixed; the end face of the vane motor 7 is matched with the side surface and the inner wall of the center seat, and the lower end face of the sealing cover plate 3, and the vane motor 7 can rotate 75 degrees in the center seat; the spline 6 connects the vane motor 7 and the helical runner 2 connection, the two limit rings 4 overlap along the cut surface, put the positioning pin 10 into the positioning pin hole of the limit ring cutout, prevent the two limit rings 4 from moving each other, and then clamp the limit ring 4 on the On the base of the spiral runner 2, the ...

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Abstract

The invention discloses a variable compression ratio piston with a limiting ring structure. The defects that in the prior art, the manufacturing cost is high, the reliability is high, and the structure is complex are overcome. The piston is composed of a piston body, a piston skirt, a piston pin, a connecting rod, a limiting ring, a vane motor, a sealing cover plate and a spiral rotating wheel; the vane motor is placed on a center base of the piston skirt, the vane motor is connected with the spiral rotating wheel through a spline, the internal thread of the piston body is matched with the external thread of the spiral rotating wheel, a pin hole of the piston body is axially parallel to a pin hole of the piston skirt, and the connecting rod is placed in a piston inner cavity, and the piston pin is inserted into the small end of the connecting rod and the pin holes of the piston skirt and the piston body. Hydraulic oil flows through an oil passage formed by the connecting rod, the piston pin and the piston skirt and then enters an oil cavity, pressure in the oil cavity pushes the vane motor to drive the spiral rotating wheel, under the screw thread fit action, the spiral rotating wheel makes the piston body and the piston skirt relatively shift, and then the compression ratio of an engine is changed.

Description

technical field [0001] The invention relates to a piston of an internal combustion engine, more precisely, a variable compression ratio piston with a limiting ring structure. Background technique [0002] The compression ratio determines the pressure of the compressed gas mixture in the gasoline engine, and the combustion characteristics of gasoline cause the gas mixture pressure of the gasoline engine to not be too high. If the pressure in the cylinder exceeds a critical value, the gasoline will be ignited due to compression before it is ignited. This phenomenon is called deflagration, and it will cause knocking, which will cause great damage to the engine. For the supercharged engines widely used now, when the turbocharger is involved, the temperature and pressure of the combustion chamber will increase significantly. If this value is too high, knocking will be inevitable. This can cause massive damage to the engine, as well as affect power output. Therefore, turbocharge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/00F02D15/00F02B75/04
CPCF02B75/044F02D15/00F02F3/0023
Inventor 苏岩王静文解方喜洪伟许允李小平姜北平周遊王耀东邵珠杰
Owner JILIN UNIV
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