Method for controlling variable compression ratio in engine

A technology of engine and compression ratio, which is applied in the direction of engine sealing device, engine ignition, engine components, etc., to reduce fuel consumption, prolong service life, and improve 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 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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  • Method for controlling variable compression ratio in engine
  • Method for controlling variable compression ratio in engine
  • Method for controlling variable compression ratio in engine

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Embodiment Construction

[0056] 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.

[0057] 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 method for controlling the variable compression ratio in an engine. The method for controlling the variable compression ratio in the engine comprises the following step of adjusting oil volume supplied to an engine cylinder head based on different rotating speeds of the engine; the oil volume refers to oil stored in a hydraulic cavity between the cylinder head and a variable compression piston; oil supplied to the hydraulic cavity is adjusted so as to increase the oil capacity, so that the variable compression piston is promoted to be extended out, or the oil suppliedto the hydraulic cavity is adjusted so as to decrease the oil capacity, so that the variable compression piston is promoted to be retracted; and extension or retraction of the variable compression piston can achieve the change of the compression ratio of the engine.

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): F02D15/00F02F3/00
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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