Measuring method and measuring device for deterioration and deterioration degree of lubricating oil

A measurement method and lubricating oil technology, applied in the direction of lubrication indicating device, measuring device, lubricating parts, etc., can solve problems such as difficult to analyze lubricating oil deterioration, deterioration mechanism, complex measurement circuit, measurement deterioration, deterioration degree, etc.

Active Publication Date: 2016-01-06
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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  • Measuring method and measuring device for deterioration and deterioration degree of lubricating oil
  • Measuring method and measuring device for deterioration and deterioration degree of lubricating oil
  • Measuring method and measuring device for deterioration and deterioration degree of lubricating oil

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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 method of measuring a degree of degradation / alteration of a lubricating oil, including obtaining dielectric constants or electrostatic capacitances at two or more different frequencies and determining a degradation / alteration state of the lubricating oil based on values of the dielectric constants or the electrostatic capacitances, in which one frequency (H 1 ) of the two or more frequencies is in a range of 1 to 100 Hz, and another frequency (H 2 ) is more than the frequency (H 1 ) and in a range of 10, 000 Hz or less. Accordingly, it is possible to provide a method of measuring a degree of degradation / alteration of a lubricating oil and a measuring device therefor, which are capable of measuring a degree of degradation of the lubricating oil easily and precisely and predicting a degradation / alteration mechanism of the lubricating 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 Patents(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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