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Method and device for processing test data of in-cylinder working process

A technology for testing data and working process, applied in the field of vehicles, it can solve the problems of garbled data, unusable special software, and inability to process test data offline in the cylinder, so as to avoid repeated connections, improve reliability, and improve application efficiency.

Inactive Publication Date: 2011-05-04
CRRC DALIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the encrypted test file is called directly in other environments, the test file cannot be used because the data is encrypted and displayed as garbled characters
[0004] The special software of the combustion analyzer can only analyze the test data when it is in communication with the corresponding combustion analyzer. Once it is separated from the combustion analyzer, the special software will be unusable
Therefore, in the process of analyzing the test data, it is necessary to connect repeatedly, and the in-cylinder test data cannot be processed offline after leaving the combustion analyzer.

Method used

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  • Method and device for processing test data of in-cylinder working process
  • Method and device for processing test data of in-cylinder working process

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Embodiment 1

[0026] figure 1 The flow chart of Embodiment 1 of the processing method for the test data of the in-cylinder working process provided by the present invention. Such as figure 1 As shown, this embodiment includes:

[0027] Step 11; extract test data in text format.

[0028] After collecting the test data during the working process of the diesel engine cylinder through the combustion analyzer, use the special software of the combustion analyzer to open the test file in the combustion analyzer to obtain the test data collected by the combustion analyzer, and convert the test data into Text format and save. Take the combustion analyzer of AVL Company as an example, connect the computer equipped with Indicom software with the AVL combustion analyzer, and open the .xpa test file in the Indicom software. Use the new display window function of the software to open the test data such as cylinder pressure, oil pipe pressure and needle valve lift, export and save them in txt file for...

Embodiment 2

[0034] figure 2 The flow chart of Embodiment 2 of the processing method for the test data of the in-cylinder working process provided by the present invention. Such as figure 2 As shown, the calculation method of the average value of the cylinder pressure in step 12 can specifically be:

[0035] Step 12A: According to the cylinder pressure test data in text format and the average value filtering method, calculate the average value of the cylinder pressure during the working process in the cylinder.

[0036] After processing the cylinder pressure test data in the text format by means of a mean value filtering method, the mean value of the cylinder pressure is obtained. The mean filtering formula of the cylinder pressure test data is: (formula 1); wherein, n is the number of working cycles in the cylinder; X i is the cylinder pressure test data at the nth cycle; Y is the cylinder pressure after taking the average value.

Embodiment 3

[0038] image 3 The flow chart of Embodiment 3 of the processing method for the test data of the in-cylinder working process provided by the present invention. Such as image 3 As shown, in step 12, the calculation method of the working parameter in the cylinder-the average value of the oil pressure can be specifically:

[0039] Step 12B: According to the oil pressure test data in text format and the mean value filtering method, calculate the average value of the oil pressure in the working process of the cylinder.

[0040] After the oil pressure test data in the text format is processed by means of a mean value filtering method, the mean value of the oil pressure is obtained. See formula 1 for the specific calculation formula.

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Abstract

The invention provides a method and a device for processing test data of an in-cylinder working process. The method comprises the following steps of: acquiring the test data in a text format; and calculating in-cylinder working parameters according to the test data in the text format. Therefore, the test data acquired by a combustion analyzer is not required to be opened through special software, repeated connection of the test data in each analysis process is avoided, the aim of processing the in-cylinder test data off line is fulfilled, and application efficiency is improved.

Description

technical field [0001] The invention relates to vehicle technology, in particular to a method and device for processing test data of an in-cylinder working process. Background technique [0002] The working process in the cylinder has a decisive impact on the performance of the diesel engine such as power, indicated efficiency, mechanical load and heat load, noise, vibration, smoke, exhaust composition, etc. Calculating and analyzing the relevant data of the working process in the cylinder is the key to research and improve combustion A simple and effective means of the process. The combustion analyzer of AVL Company in Austria is the main test instrument for the current in-cylinder working process. During the working process of the diesel engine, under the condition that the instrument and the computer are connected and communicated, the test data such as cylinder pressure, oil pressure, needle valve lift and crank angle in the diesel engine cylinder are collected by the s...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 肖桦
Owner CRRC DALIAN CO LTD
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