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Measurement method of degradation/alteration degree of lubricant oil and measurement device thereof

A measurement method and a technology of a measurement device, which are applied in the directions of lubrication indicating devices, measuring devices, lubricating parts, etc., can solve the problems of measurement deterioration, degree of deterioration, complex measurement circuits, expensive devices, etc.

Active Publication Date: 2012-09-12
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, the method described in this patent document 2 is difficult to accurately measure the degree of deterioration and deterioration from the measured value of the permittivity, and it is difficult to analyze the mechanism of deterioration and deterioration of lubricating oil (deterioration cause)
[0011] In addition, the device for measuring impedance disclosed in Non-Patent Document 1 or Patent Document 2 has a complicated measurement circuit, which makes the device expensive.

Method used

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  • Measurement method of degradation/alteration degree of lubricant oil and measurement device thereof
  • Measurement method of degradation/alteration degree of lubricant oil and measurement device thereof
  • Measurement method of degradation/alteration degree of lubricant oil and measurement device thereof

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Embodiment

[0077] Examples of the present invention will be further described, but the present invention is not limited to these examples.

[0078] [Example]

[0079] use Figure 4 The degradation and deterioration degree measuring device (capacitance measurement unit and permittivity calculation unit) of lubricating oil shown in the figure is based on the following measurement conditions for the following sample oils (i) to (v) (fresh oil, and deteriorated, deteriorating oil) to measure the capacitance component [capacitance (pF)] at 40, 100, 150, 1000 and 10,000 Hz. The result is a change in capacitive component (capacitance) with respect to frequency, as figure 1 shown.

[0080] (measurement conditions)

[0081] · Electrodes: interdigitated array tiny electrodes

[0082] ・Measurement voltage 1V p-p

[0083] (measurement sample)

[0084] (i) Lubricating oil A new oil (ashless engine oil)

[0085] (ii) Lubricating oil B new oil (CD grade diesel engine oil)

[0086] (iii) Lubri...

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Abstract

Provided is a measurement method of a degradation / alteration degree of lubricant oil for determining dielectric constants or capacitances at two or more different frequencies and judging the degradation / alteration state of the lubricant oil on the basis of the values of the dielectric constants or the capacitances. Out of the two or more frequencies, one frequency (H1) is set to fall within the range of 1 to 100 Hz, and another frequency (H2) is set to be higher than the frequency (H1) and equal to or lower than 10,000 Hz, with the result that it is possible to easily and accurately measure the degradation / alteration degree of the lubricant oil and to predict a degradation / alteration mechanism thereof. Also provided is a measurement device of the degradation / alteration degree of the lubricant oil.

Description

technical field [0001] The invention relates to a method for measuring the deterioration and deterioration degree of lubricating oil, in particular to a method for measuring the deterioration and deterioration degree of lubricating oil, which can predict the deterioration and deterioration mechanism of lubricating oil. its measuring device. Background technique [0002] The deterioration and degree of deterioration of lubricating oil have a great influence on the performance, durability, and energy-saving performance of machines and devices using the lubricating oil. In addition, the rate of deterioration and deterioration of lubricating oil significantly differs depending on the usage conditions of the lubricating oil. Therefore, it is necessary to easily and accurately measure the state of deterioration and deterioration of lubricating oil. [0003] In the past, the degradation and degree of deterioration of lubricating oils such as engine oils have been measured in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/22F01M11/10G01N33/30
CPCG01N33/2888F01M11/10F01M2011/1413F16N2250/30G01N27/221
Inventor 片渊正
Owner IDEMITSU KOSAN CO LTD
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