High-low type dual-vortex-chamber dual-necking combustion chamber
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
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
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
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
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more