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Variable compression piston

A piston, variable technology, applied in the direction of piston, internal combustion piston engine, engine components, etc., to achieve the effect of prolonging the service life

Inactive Publication Date: 2018-10-16
NANAN GAOJIE ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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Embodiment Construction

[0046] 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.

[0047] 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 variable compression piston. By means of the variable compression piston, the problem that in the prior art, the compression ratio is unified under different engine loads is solved. According to the technical scheme, the variable compression piston is characterized in that a piston body is connected with an extending-and-contracting rod; a second combustion chamber is formed by a cambered surface of the variable compression piston; and the second combustion chamber and a combustion chamber of a cylinder head act jointly. A vehicle-mounted ECU controls a motor, and thecompression ratio formed when an engine operates at the low load is completely different from those formed when the engine operates at the medium load and the high load; and different compression ratios and ignition time are achieved when the engine loads and engine rotating speeds are different. Therefore, the power and impetus of the engine are increased.

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): F02D15/04F02B23/02F02F3/00
CPCF02B23/02F02D15/04F02F3/00Y02T10/12
Inventor 庄景阳
Owner NANAN GAOJIE ELECTRONICS TECH
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