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Cylinder head with changeable compression ratio

A cylinder head and compression ratio technology, applied in the field of gasoline engines, to achieve the effect of prolonging the service life

Inactive Publication Date: 2017-09-05
石狮市恒鑫电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention proposes a variable compression ratio engine, which solves the problem of uniform compression ratio of different engine loads in the prior art

Method used

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  • Cylinder head with changeable compression ratio
  • Cylinder head with changeable compression ratio
  • Cylinder head with changeable compression ratio

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0043] A variable compression ratio engine, which includes a variable compression ratio mechanism capable of changing the mechanical compression ratio, and makes the compression ratio when the engine operates at a low load completely different from the compression ratios when the engine operates at a medium load and at a high load, realizing To meet different compression ratios at different engine loads and different engine speeds. Thus, the service life of the roc...

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Abstract

The invention provides a cylinder head with the changeable compression ratio. The problem of the uniform compression ratio of different engine loads in the prior art is solved. According to the technical scheme, the cylinder head with the changeable compression ratio comprises a hydraulic cavity connected with an oil inlet nozzle; a sliding hole is formed in the cylinder head and used for insertion of a telescopic rod to achieve the balance of a changeable compression piston and a motion track of the cylinder head; a motor and the changeable compression piston are mounted in the positions, close to a combustion chamber, of the hydraulic cavity, namely, after the motor and the changeable compression piston are mounted in the cylinder head in sequence, a cavity between the changeable compression piston and the cylinder head is the hydraulic cavity, and the hydraulic cavity is also a movable cavity of the changeable compression piston. The changeable compression piston can extend or retract in the movable cavity.

Description

technical field [0001] The present invention relates to a gasoline engine, in particular to an engine whose compression ratio can be changed according to engine load and rotation speed. Background technique [0002] The compression ratio of the engine refers to the ratio of the stroke of the working piston in the cylinder to the combustion chamber. The higher the compression ratio, the better the combustion efficiency. However, the higher the compression ratio, the higher the knocking of the engine, and the easier it is for the cylinder and piston to knock and wear. Especially under high load conditions, the power of the engine will drop instead. [0003] As the grade of gasoline gets higher and higher, the increase of octane number is to reduce the knocking caused by the high compression ratio. However, its effect is limited. It can only be controlled at 13:1. Of course, due to the refining and manufacturing process of gasoline in the same region, the compression ratio of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F1/24F02B75/04F02D15/04
CPCF02F1/24F02B75/044F02D15/04F02D2700/03
Inventor 庄景阳
Owner 石狮市恒鑫电子科技有限公司
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