Method and device for determining the amount of urea crystallization in an engine
An engine and crystallization technology, which is applied to engine components, combustion engines, machines/engines, etc., can solve the problems of inaccurate calculation results, large calculation resources, and slow calculation speed, etc., to solve the problems of heavy workload, reliable data support, The effect of improving efficiency
Active Publication Date: 2021-05-18
WEICHAI POWER CO LTD
View PDF8 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] The embodiment of the present application provides a method and device for determining the amount of urea crystallization in an engine, to at least solve the problem that the existing urea crystallization calculation method requires a large workload, consumes a lot of calculation resources, has a slow calculation rate, and has insufficient calculation results accurate technical questions
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
[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0025] It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such...
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 present application discloses a method and a device for determining the amount of urea crystallization in an engine. Wherein, the method includes: according to the different exhaust flow rates of the engine, the exhaust gas temperature and the urea injection volume of the engine are calibrated to obtain multiple sets of calibration values, and each set of calibration values includes the exhaust gas temperature and the urea injection volume; Multiple sets of calibration values draw the control curve diagram of exhaust gas temperature and urea injection quantity, wherein the abscissa of the control curve diagram is the value of exhaust gas temperature, and the ordinate of the control curve diagram is the value of urea injection quantity; the control curve The map is divided into multiple working condition areas; the urea crystallization amount when the engine is working in each working condition area is calculated according to the calculation method of the urea crystallization amount corresponding to each working condition area in the multiple working condition areas. The application solves the technical problems that the existing calculation method for urea crystallization requires a large workload, consumes a lot of calculation resources, has a slow calculation rate, and the calculation results are not accurate enough.
Description
technical field [0001] The present application relates to the field of engines, in particular, to a method and device for determining the amount of urea crystals in an engine. Background technique [0002] When treating the exhaust of diesel engines, as the main technology for diesel engines to meet higher emission regulations, selective catalytic reduction technology (SCR) is increasingly widely used. When the urea solution is sprayed into the exhaust pipe, under the influence of high-temperature exhaust gas, evaporation and pyrolysis will occur, and the liquid droplets will inevitably collide with the wall of the exhaust pipe, causing the temperature in this area to drop significantly, and then in the Crystallization deposits are formed on the wall surface. When the crystallization is severe, the exhaust pipe will be blocked, the exhaust back pressure will be increased, the fuel consumption will be increased, and the economy, power performance and emission level of the veh...
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): F01N11/00F01N3/20
CPCF01N3/2066F01N3/208F01N11/00F01N2610/02Y02T10/12Y02T10/40
Inventor 赵姗姗谭治学梁博强解同鹏杨金鹏
Owner WEICHAI POWER CO LTD