CN107832555B - Packaging force calculation method for diesel engine post-processing - Google Patents
Packaging force calculation method for diesel engine post-processing Download PDFInfo
- Publication number
- CN107832555B CN107832555B CN201711221498.4A CN201711221498A CN107832555B CN 107832555 B CN107832555 B CN 107832555B CN 201711221498 A CN201711221498 A CN 201711221498A CN 107832555 B CN107832555 B CN 107832555B
- Authority
- CN
- China
- Prior art keywords
- packaging
- force
- diesel engine
- functional relation
- calculation method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
Landscapes
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to a packaging force calculation method for diesel engine post-processing, which solves the technical problem that the packaging force calculation is not considered comprehensively, and comprises the following steps: step 1, measuring and obtaining a liner parameter, wherein the liner parameter is the density of a liner body; step 2, measuring a first functional relation between the gasket parameters and peak pressure during packaging, and testing a second functional relation between the gasket parameters and pressure after rebound after packaging; and 3, calculating the packaging force p according to the required post-package rebound pressure, so that the problem is well solved, and the method can be used in the field of diesel engine tail gas post-processors.
Description
Technical Field
The invention relates to the field of diesel engine tail gas aftertreatment devices, in particular to a packaging force calculation method for diesel engine aftertreatment.
Background
Under the current domestic technical background, the post-treatment technology of the diesel engine is continuously updated, but the main failure mode of the post-treatment in the market is that the carrier slips in the cylinder body, and the carrier is seriously moved out of the design position. Therefore, the mainstream design idea of the part is to examine whether the clamping force of the gasket on the carrier can overcome the push-out force generated by the exhaust back pressure of the engine on the carrier and influence of part of the vehicle acceleration. However, in practice, the properties of the gasket are changed because the high temperature of the engine exhaust gas is in contact with the gasket for a long time, which causes the glue in the gasket to be damaged by the high temperature and then to be brought into the atmosphere along with the exhaust gas. But the pad clamping force is greatly reduced within a period of time after the glue is lost due to the particularity of the pad material, so that the product is invalid; in addition, over time, the material will change its modulus to accommodate new conditions, which in turn will lead to new problems: the material springs back too much to apply a redundant load to the carrier, resulting in a risk of breakage of the carrier.
Therefore, the invention provides a method for calculating the packaging force of the diesel engine post-processing, which is used for guiding the selection of the carrier gasket, ensuring the qualification rate of the on-line packaging carrier and further ensuring the service life of a post-processing mechanical system.
Disclosure of Invention
The invention aims to solve the technical problem that the packaging force calculation in the prior art is not completely considered. The method for calculating the packaging force for the diesel engine after-treatment has the characteristics of reducing the cost and reducing the failure probability of parts during generation.
In order to solve the technical problems, the technical scheme is as follows:
a packaging force calculation method for diesel aftertreatment, the calculation method comprising:
and 3, calculating the packaging force p according to the required pressure after the package rebounds.
The working principle of the invention is as follows: the invention measures the functional relation between the liner parameter and the peak pressure in advance and the rebound pressure after packaging, further obtains the packaging force directly according to the measured liner parameter, namely the density of the liner body, and designs the liner selection by using the packaging force. Due to the particularity of the liner material, the liner clamping force is greatly reduced within a period of time after the glue is lost, so that the product is invalid; and the gasket material will change its modulus over time to accommodate the new situation: consideration is given to the fact that the material springs back too much and thereby applies a redundant load to the carrier, resulting in a risk of breakage of the carrier. Therefore, the problem that the packaging force is not fully calculated can be solved well.
In the above scheme, for optimization, the calculation method further includes measuring and obtaining a decay relationship, and selecting a decay coefficient according to the decay relationship to correct the packaging force.
Further, the obtained decay relationship is the relationship between the change value of the carrier push-out force and the aging measured by a gasket aging test, and the decay coefficient is a correction coefficient a.
Further, the correcting the packaging force comprises: calculating the pressure p1 after the clip rebounds according to the correction coefficient a, namely the correction coefficient a multiplied by the packaging force p;
and (3) substituting the pressure p1 after the package rebounds into a second functional relation between the test pad parameter and the pressure after the package rebounds by using an interpolation method, and calculating the density of the pad body.
Further, the liner parameter in the first functional relationship and the second functional relationship is 6 values, the corresponding peak pressure value is 6 values, and the rebound pressure is also 6 values.
Further, the first functional relationship is obtained by fitting 6 pad parameters and 6 peak pressure value difference values, and the second functional relationship is obtained by fitting 6 pad parameters and 6 post-rebound pressure difference values.
Under the condition of obtaining the parameters of the gasket, the peak pressure during packaging is calculated, and meanwhile, the attenuation of the rebound force after packaging is considered, so that more accurate packaging force is set, and the failure probability of parts during production is reduced. Considering the situation that the clamping force is reduced again after the heated adhesive of the gasket is lost in the using process, a decay curve is obtained through a preliminary experiment test, and the clamping force of the gasket is corrected by designing an attenuation coefficient. Thereby reducing the problem of carrier moving out of the designed position and other failures in the use of the product and prolonging the service life.
The invention has the beneficial effects that:
the method has the advantages that firstly, the particularity of the gasket material is fully considered, the packaging force is comprehensively calculated, and the calculation effect is good;
and secondly, further correcting to improve the calculation accuracy.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic diagram of a diesel engine post-processing package structure.
Fig. 2, variation in carrier ejection force after liner aging.
Fig. 3 is a schematic diagram of a first functional relationship and a second functional relationship in embodiment 1.
Fig. 4 is a schematic diagram of a first functional relationship and a second functional relationship in embodiment 2.
FIG. 5 is a flow chart of a packaging force calculation method for diesel engine aftertreatment.
1-packaging the cylinder; 2-a liner; 3-a catalyst support; 4-perforated plate of silencer; 5-tail pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The embodiment provides a packaging force calculation method for diesel engine aftertreatment, which is applied to the diesel engine aftertreatment packaging structure shown in fig. 1 and comprises a packaging cylinder body 1; a gasket 2; a catalyst carrier 3; a silencer perforated plate 4; a tail pipe 5. The calculation method, as shown in fig. 5, includes:
and 3, calculating the packaging force p according to the required pressure after the package rebounds.
Specifically, a second diagram of the functional relationship of the package back pad spring force decay test of fig. 3 was first determined by experiment. The required pressure, i.e. the package force p, was then found to be 41.67, depending on the required clamping force.
The mat body density value, i.e. GBD, is 0.17 when the pressure p1 after springback is 20.835, with a correction factor a of 0.5, and p1 is brought into fig. 4, by selecting the after-treatment carrier ejection force after the mat is heat aged. And calculating the diameter of the required cylinder according to the GBD parameters and the diameter of the carrier, and finally finishing the packaging design.
Example 2
This embodiment further simplifies the calculation process based on embodiment 1.6 points are selected as datum points of the first functional relation and the second functional relation. GBD of 6 reference points was taken as the value of the x-axis, and the corresponding post-package attenuation clamping force curve was measured, and the measurement results are shown in table 1:
FIG. 4 was obtained according to the difference fitting method, according to Table 1. Also, peak pressure is used in general design to check packaging process reliability; the post-rebound pressure value obtained after the test can be used for the final step of the design: the GBD value is determined in reverse, and is used directly to design the diameter of the package housing.
Although the illustrative embodiments of the present invention have been described above to enable those skilled in the art to understand the present invention, the present invention is not limited to the scope of the embodiments, and it is apparent to those skilled in the art that all the inventive concepts using the present invention are protected as long as they can be changed within the spirit and scope of the present invention as defined and defined by the appended claims.
Claims (5)
1. A packaging force calculation method for diesel engine aftertreatment, characterized by: the calculation method comprises the following steps:
step 1, measuring and obtaining a liner parameter, wherein the liner parameter is the density of a liner body;
step 2, measuring a first functional relation between the gasket parameters and peak pressure during packaging, and testing a second functional relation between the gasket parameters and pressure after rebound after packaging;
step 3, calculating the packaging force p according to the required pressure after the package rebounds;
in the step 2, a functional relation schematic diagram of an elastic force attenuation experiment of the packaged liner is determined through an experiment;
in step 3, the required pressure, i.e. the package force p, is found on the functional relationship diagram according to the required clamping force.
2. The packaging force calculation method for diesel engine after-treatment according to claim 1, characterized in that: the calculation method further comprises the steps of measuring and obtaining a decay relation, and selecting a decay coefficient according to the decay relation to correct the packaging force.
3. The packaging force calculation method for diesel engine after-treatment according to claim 2, characterized in that: the obtained decay relationship is the relationship between the change value of the carrier push-out force and the aging measured by a gasket aging test, and the decay coefficient is a correction coefficient a.
4. The method of calculating a packaging force for diesel engine after-treatment of claim 3, wherein: the liner parameter in the first functional relation and the second functional relation is 6 values, the corresponding peak pressure value is 6 values, and the pressure after rebound is also 6 values.
5. The method of calculating a packaging force for diesel engine after-treatment of claim 4, wherein: the first functional relation is obtained by fitting 6 gasket parameters and 6 peak pressure value difference values, and the second functional relation is obtained by fitting 6 gasket parameters and 6 rebound pressure difference values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711221498.4A CN107832555B (en) | 2017-11-22 | 2017-11-22 | Packaging force calculation method for diesel engine post-processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711221498.4A CN107832555B (en) | 2017-11-22 | 2017-11-22 | Packaging force calculation method for diesel engine post-processing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107832555A CN107832555A (en) | 2018-03-23 |
| CN107832555B true CN107832555B (en) | 2021-08-31 |
Family
ID=61646378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711221498.4A Active CN107832555B (en) | 2017-11-22 | 2017-11-22 | Packaging force calculation method for diesel engine post-processing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107832555B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202212741U (en) * | 2011-08-30 | 2012-05-09 | 浙江邦得利汽车环保技术有限公司 | Diesel engine selective catalytic reduction (SCR) catalyst encapsulation device |
| WO2012142592A1 (en) * | 2011-04-14 | 2012-10-18 | Georgia Tech Research Corporation | Through package via structures in panel-based silicon substrates and methods of making the same |
| CN103196663A (en) * | 2013-03-21 | 2013-07-10 | 杰锋汽车动力***股份有限公司 | Testing method of performance of diesel particle filter liner |
| CN205297698U (en) * | 2015-12-15 | 2016-06-08 | 潍柴动力股份有限公司 | Take encapsulation unit of reticulation structure |
-
2017
- 2017-11-22 CN CN201711221498.4A patent/CN107832555B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012142592A1 (en) * | 2011-04-14 | 2012-10-18 | Georgia Tech Research Corporation | Through package via structures in panel-based silicon substrates and methods of making the same |
| CN202212741U (en) * | 2011-08-30 | 2012-05-09 | 浙江邦得利汽车环保技术有限公司 | Diesel engine selective catalytic reduction (SCR) catalyst encapsulation device |
| CN103196663A (en) * | 2013-03-21 | 2013-07-10 | 杰锋汽车动力***股份有限公司 | Testing method of performance of diesel particle filter liner |
| CN205297698U (en) * | 2015-12-15 | 2016-06-08 | 潍柴动力股份有限公司 | Take encapsulation unit of reticulation structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107832555A (en) | 2018-03-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8532908B2 (en) | System and method for estimating indicated mean effective pressure of cylinders in an engine | |
| CN110926707B (en) | Method, device and equipment for detecting leakage of hydrogen storage system | |
| CN107885930B (en) | Relay elastic metallic material accelerated storage degradation failure mechanism changes method of discrimination | |
| CN107832555B (en) | Packaging force calculation method for diesel engine post-processing | |
| US20150020507A1 (en) | Particulate filter performance monitoring | |
| CN113022331A (en) | Hydrogen leakage monitoring and alarming method and system for fuel cell vehicle | |
| CN105863841A (en) | Method for conducting angle encoding on instantaneous pressure in engine cylinder | |
| CN105300699A (en) | Method for evaluating engine thrust transient performance | |
| CN112560162B (en) | Method and device for reducing suspended road spectrum load of power assembly | |
| CN115324696A (en) | Smoke intensity control method and device and vehicle | |
| CN215865825U (en) | Suspension load testing device for automobile exhaust suspension | |
| Muthuraj et al. | Improvement in the wheel design using realistic loading conditions-FEA and experimental stress comparison | |
| CN104742895A (en) | Passenger car air brake system fault detection method based on analytic model | |
| CN110069054A (en) | The optimization method of diesel engine controller atmospheric pressure temperature sensor | |
| CN113803144A (en) | Aftertreatment hydrocarbon coverage judgment method and aftertreatment system | |
| CN108104964B (en) | Intake air temperature correction method and device and engine controller | |
| CN115219216A (en) | Service life evaluation method of exhaust system | |
| CN112729870A (en) | P-V characteristic measuring system and testing method for low-voltage energy accumulator | |
| CN115688486B (en) | Thermal fatigue life assessment method and device | |
| KR20200043692A (en) | Method for Prediction of Soot Burning During GPF Regeneration | |
| CN214698010U (en) | Test bench for detecting accuracy of hydrocarbon injection system | |
| CN115372182B (en) | Accelerated life test method for polytetrafluoroethylene hose for aeroengine | |
| CN209261713U (en) | It is a kind of for improving the device of high-pressure oil pipe cast installation accuracy | |
| CN216767613U (en) | High-pressure oil rail of engine | |
| CN211525688U (en) | Pipeline isolation clip and automobile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |