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Variable-compression-ratio cylinder head

A technology of cylinder head and compression ratio, applied in the field of gasoline engine, to achieve the effect of reducing fuel consumption, prolonging service life and improving low-speed torque

Inactive Publication Date: 2018-07-31
NANAN GAOJIE ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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Embodiment Construction

[0054] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0055] A variable compression ratio engine, which includes a variable compression ratio mechanism capable of changing a mechanical compression ratio, and makes the compression ratio when the engine operates at a low load completely different from the compression ratio during medium load and high load operation of the engine, achieving Different compression ratios to meet different engine loads and different engine speeds. Thus, the se...

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Abstract

The invention provides a variable-compression-ratio cylinder head. By adoption of the variable-compression-ratio cylinder head, the problem that in the prior art, the compression ratio under differentengine loads is constant is solved. According to the technical scheme, the variable-compression-ratio cylinder head comprises a variable-compression ratio mechanism capable of changing the compression ratio of a machine to make the compression ratio of an engine operating under a low load completely different from the compression ratio of the engine operating under a high load, and the requirement for the different compression ratios and the ignition time under different engine loads and different engine rotating speeds are met. Thus, the power and dynamic property of the engine are improved.

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 rotational speed. Background technique [0002] The compression ratio of an 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 the cylinder and piston are to knock and wear. Especially under high load conditions, the power of the engine decreases. [0003] As the grade of gasoline gets higher and higher, the increase of octane number is to reduce the knock caused by high compression ratio, but its effect is limited. It can only be controlled at 13:1. Of course, the same engine has a high compression ratio of 14:1 due to the refining and production process of regional gasoline. [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F1/24F02B75/04F02D15/04F02P5/06F02P5/14F02F3/00F02D43/00
CPCF02B23/08F02B25/00F02B75/041F02B75/044F02D15/00F02D15/04F02D43/00F02D2200/101F02D2200/602F02D2700/03F02F1/24F02F3/00F02F3/0015F02F11/00F02P5/045F02P5/06F02P5/14Y02T10/12
Inventor 庄景阳
Owner NANAN GAOJIE ELECTRONICS TECH
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