Packaging force calculation method used for diesel engine post-processing

A calculation method and packaging force technology, which is applied in the field of diesel engine exhaust post-processor, can solve the problems of incomplete calculation of packaging force, etc., and achieve the effects of reducing the failure probability of parts, good calculation effect and improving calculation accuracy

Active Publication Date: 2018-03-23
WUXI WOERFU AUTO TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is the technical problem that the packaging force calculation in the prior art does not consider comprehensively

Method used

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  • Packaging force calculation method used for diesel engine post-processing
  • Packaging force calculation method used for diesel engine post-processing
  • Packaging force calculation method used for diesel engine post-processing

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Embodiment 1

[0030] This embodiment provides a method for calculating the encapsulation force for aftertreatment of diesel engines, and the calculation method is applied to such as figure 1 The diesel engine post-treatment package structure includes a package cylinder 1 ; a liner 2 ; a catalyst carrier 3 ; a muffler porous plate 4 ; and an exhaust tailpipe 5 . The calculation method, such as Figure 5 ,include:

[0031] Step 1, measure and obtain the pad parameters, and the pad parameters are pad body density;

[0032] Step 2, measuring the first functional relationship between the gasket parameters and the peak pressure during packaging, and the second functional relationship between the test gasket parameters and the rebound pressure after packaging;

[0033] Step 3. Calculate the encapsulation force p according to the required post-encapsulation springback pressure.

[0034] Specifically, firstly, it is determined through experiments that image 3 Schematic diagram of the function r...

Embodiment 2

[0037] On the basis of Embodiment 1, this embodiment further simplifies the calculation process. By selecting 6 points as the reference points of functional relationship 1 and functional relationship 2. Take the GBD of the 6 reference points as the value of the x-axis, and measure the corresponding attenuation and holding force curve after packaging. The measurement results are shown in Table 1:

[0038]

[0039] According to Table 1, according to the difference fitting method to get Figure 4 . Similarly, the peak pressure is used to assess the reliability of the packaging process in the general design; the pressure value after the springback obtained after the test can be used in the last step of the design: the reverse determination of the GBD value, which is directly used to design the diameter of the package shell.

[0040] Embodiment 2 provides a calculation of packaging force in the packaging reliability design in the general design that does not require high preci...

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Abstract

The invention relates to a packaging force calculation method used for diesel engine post-processing, and aims to solve the technical problem that consideration of packaging force calculation is not comprehensive. The calculation method includes: step 1, acquiring a liner parameter by measurement, wherein the liner parameter is liner body density; step 2, measuring a function relationship one of the liner parameter and peak pressure in packaging and a function relationship two of a test liner parameter and pressure after rebounding after packaging; and step 3, calculating packaging force p according to needed pressure after rebounding after packaging. By adopting the technical solution, the problem is better solved. The technical solution can be used in the field of diesel engine exhaust post-processors.

Description

technical field [0001] The invention relates to the field of diesel engine exhaust aftertreatment, in particular to a packaging force calculation method for diesel engine aftertreatment. Background technique [0002] Under the current domestic technical background, diesel engine aftertreatment technology is also constantly being updated, but the main failure form of aftertreatment on the market is often that the carrier slips in the cylinder, and even moves out of the design position in serious cases. Therefore, the mainstream design idea of ​​this part is to assess whether the support force of the liner on the carrier can overcome the push-out force generated by the exhaust back pressure of the engine on the carrier, and the influence of part of the vehicle acceleration. However, the actual situation is that after long-term contact with the gasket due to the high temperature of the engine exhaust gas, the glue in the gasket will be destroyed by high temperature and then be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F2119/06
Inventor 刘元琦许福忠
Owner WUXI WOERFU AUTO TECH CO LTD
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