Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High-low type dual-vortex-chamber dual-necking combustion chamber

A combustion chamber, double swirl technology, applied in engine components, machines/engines, pistons, etc., can solve problems such as reducing the average temperature in the cylinder, and achieve the effect of reducing NOx and SOOT

Inactive Publication Date: 2020-09-11
JIANGSU UNIV OF SCI & TECH
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This expands the combustion range, reduces the average temperature in the cylinder, and reduces the generation of NOx, but due to the collision with the wall, more SOOT will be generated on the wall

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-low type dual-vortex-chamber dual-necking combustion chamber
  • High-low type dual-vortex-chamber dual-necking combustion chamber
  • High-low type dual-vortex-chamber dual-necking combustion chamber

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0029] Such as figure 1 Shown: a high and low double vortex chamber double constriction combustion chamber, the longitudinal section of the combustion chamber is butterfly-shaped, the combustion chamber is divided into two arc-shaped constriction vortex chambers distributed up and down, and the center of the combustion chamber is the arc top Round table.

[0030] The combustion chamber is offset, and the offset δ is 4mm.

[0031] The arc necking radius ratio r / R of the upper and lower vortex chambers is 0.3.

[0032] There is a boundary ridge between the upper and lower vortex chambers, and the top fillet diameter of the boundary ridge is 4mm.

[0033] There is a diversion slope between the upper vortex chamber and the boundary ridge, and the diversion slope is tangent to the arc of the upper vortex chamber.

[0034] There is an upper vortex chamber top curved surface between the upper vortex chamber and the top of the piston, and the top end is a rounded corner with a diam...

specific Embodiment approach 2

[0037] Such as figure 1 Shown: a high and low double vortex chamber double constriction combustion chamber, the longitudinal section of the combustion chamber is butterfly-shaped, the combustion chamber is divided into two arc-shaped constriction vortex chambers distributed up and down, and the center of the combustion chamber is the arc top Round table.

[0038] The combustion chamber is offset, and the offset δ is 5mm.

[0039] The arc necking radius ratio r / R of the upper and lower vortex chambers is 1.3.

[0040] There is a boundary ridge between the upper and lower vortex chambers, and the diameter of the top fillet of the boundary ridge is 2 mm.

[0041] There is a diversion slope between the upper vortex chamber and the boundary ridge, and the diversion slope is tangent to the arc of the upper vortex chamber.

[0042] There is an upper vortex chamber top curved surface between the upper vortex chamber and the top of the piston, and the diameter of the top fillet is 2...

Embodiment approach 3

[0045] The difference from Embodiment 1 is that the arc constriction radius ratio r / R of the upper and lower vortex chambers is 0.7.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a high-low type dual-vortex-chamber dual-necking combustion chamber, and vortex chambers are distributed high and low. The combustion chamber comprises an upper vortex chamber with circular-arc type necking and a low vortex chamber with circular-arc type necking, wherein a boundary ridge is arranged between the upper vortex chamber and the lower vortex chamber; the center ofthe combustion chamber is provided with a round-top frustum; the boundary ridge of the upper and lower vortex chambers and the upper vortex chamber define a guide inclined surface; and the upper vortex chamber and the top of a piston define a curved surface. The high-low type dual-vortex-chamber dual-necking combustion chamber is suitable for a supercharged and mid-cooling direct-injection type diesel engine. The high-low type dual-vortex-chamber dual-necking combustion chamber can organize and utilize horizontal vortex around the center line of a gas cylinder and longitudinal rolling flow toimprove fuel oil-gas mixing, so that a gas mixture is uniform, combustion is sufficient, local high-temperature areas are fewer, and NOx and SOOT emission amount is reduced. Flywheel effect further can be formed on the upper vortex chamber; the circular-arc type necking structure of the upper vortex chamber can define vortex with biggest linear speed in the whole combustion chamber, and time of duration lasts from the later period of a compression stroke to an early-medium period of working stroke. The upper vortex chamber stores fresh air during the compression stroke, so that gas is provided for oxidizing SOOT in the after combustion period.

Description

technical field [0001] The invention relates to the field of small and medium-sized supercharged and intercooled direct-injection diesel engines, in particular to a high-low type double-vortex chamber and double-neck combustion chamber. Background technique [0002] The "oil-air-chamber" matching in the diesel engine directly affects the generation of the mixture, which in turn directly affects the power and emission of the diesel engine. The shape of the combustion chamber is the basic carrier of "oil-gas-chamber" matching, which determines the upper limit of the matching degree. [0003] Most of the current direct injection diesel engines use deep pit Type necking combustor will form squish flow and reverse squeeze flow at the neck before and after the compression top dead center. The oblique axis vortex is formed when the squish flow interacts with the horizontal vortex in the combustion chamber. Although this is beneficial to the atomization, evaporation, and air mix...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/26F02F3/24
CPCF02F3/24F02F3/26
Inventor 苏石川李毅徐华平王亮曹佳斌
Owner JIANGSU UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com