Anti-crystallization control method and device based on sulfur dioxide sensor
A sulfur dioxide and crystallization technology, applied in exhaust devices, mufflers, machines/engines, etc., can solve problems affecting SCR efficiency and life, and achieve the effect of avoiding the increase of crystallization
Active Publication Date: 2022-01-25
WEICHAI POWER CO LTD
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] At this time, since the urea sprayed into the SCR cannot be combined with the SCR, crystals will form in the SCR after the water in the urea is evaporated, and the accumulation of urea crystals will affect the efficiency and life of the SCR
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0048] 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 making creative efforts belong to the protection scope of the present invention.
[0049] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0050] refer to figure 1 , figure 1 It is a schematic flowchart of an anti-crystallization control method based on a sulfur dioxide sensor provided by an embodiment of the present invention.
[0051] The anti-cr...
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 an anti-crystallization control method and device based on a sulfur dioxide sensor, comprising: obtaining the concentration of sulfur dioxide in the exhaust gas; calculating the current sulfide content in the SCR of the engine during the entire operation process of the engine according to the concentration of sulfur dioxide; obtaining the maximum value of the SCR Sulfide salt storage, and calculate the current sulfide salt storage rate based on the current sulfide salt content and the maximum sulfide storage capacity; obtain the maximum ammonia storage capacity of the SCR, and calculate the current sulfide salt storage rate based on the maximum ammonia storage capacity and the maximum sulfide storage capacity Salt storage rate, calculate the adhesion capacity and mass comprehensive ratio of ammonia and sulfide salt; calculate the current SCR residual ammonia storage capacity according to the sulfide salt storage rate and the mass comprehensive ratio; obtain urea according to the SCR residual ammonia storage capacity Injection amount correction value, the injection amount of urea is controlled according to the urea injection amount correction value, so as to avoid the situation that crystallization increases due to injection of too much urea.
Description
technical field [0001] The invention relates to the technical field of diesel engine control, and more specifically relates to a method and device for anti-crystallization control based on a sulfur dioxide sensor. Background technique [0002] Vehicle diesel contains a certain amount of sulfur. When diesel is burned in the cylinder, part of the sulfur will enter the after-treatment system along with the exhaust gas, and this part of sulfur will react to produce sulfide, which is attached to the SCR (Selective Catalytic Reduction, Selective Catalytic Reduction, Selective Catalytic Reduction, Active catalytic reduction technology) on the catalyst, thereby preventing the urea from combining with the catalyst and reducing the ammonia storage capacity of the SCR. [0003] At this time, since the urea sprayed into the SCR cannot be combined with the SCR, crystals will form in the SCR after the water in the urea is evaporated, and the accumulation of urea crystals will affect the e...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/20
CPCF01N3/208F01N2610/02F01N2610/1486F01N2900/1402F01N2900/16Y02T10/12
Inventor 王毓源王金平徐文双赵杰侯郭顺
Owner WEICHAI POWER CO LTD