Method for determining content of cooling liquid in motor oil

FIELD: technology for diagnosing status of motor oil, possible use for determining quality of motor oil during operation and its fitness for further use.

SUBSTANCE: in accordance to method for determining content of liquid in motor oil, motor oil is heated up and by intensiveness of characteristic air bubbles, presence of liquid is evaluated, while firstly a template made of wire in form of mesh is applied to crucible of Cleveland machine, heated up with heating speed 6°C per 1 min up to 100°C, in range of temperatures 120-140°C heating is decreased down to 2°C per 1 minute, then position of cells in contour, formed by air bubbles in template, is visually memorized, further, contour is transferred over a squared paper, by squares, value of area of contour surface is calculated by its value, percentage of liquid is determined using standard depending on base for motor oil.

EFFECT: increased precision of detection of presence of cooling liquid in oils and its percentage.

3 tbl, 2 dwg

 

The invention relates to the field of diagnostics of engine oil, and is intended to determine the quality of motor oil in the process and its suitability for continued service.

The presence of water in oil can be determined by a qualitative method crackling according to GOST 1547-42 or quantitative GOST 2477-44.

The closest in technical essence and the achieved result claimed is a method of determining the coolant in the engine oil, implemented by a device for determining the quality of the engine oil (As the USSR №1763976, G 01 N 33/22, 33/30, 23.09.1992), which compare the reference oil drops with the cooling fluid and the test oil. On the intensity of air bubbles from the drops at a temperature of 150°To judge the presence of fluid in oil.

The disadvantage of the prototype is the low accuracy of the method, due to the imperfection of the device, consisting of non-standard components, a copying apparatus of Cleveland, and visual, an approximate comparison of oil from the reference sample by the intensity of bubbles. In addition, the heating device up to 150°can lead to sudden boiling oil.

The objective of the invention is to improve the accuracy of determining the presence of coolant in the oil and its percentage.

Set the military objective is achieved by a method for determining the content of the coolant in the engine oil, which engine oil is heated and intensity characteristic of air bubbles determine the presence of fluid, unlike the prototype, the first template made of wire mesh, placed on the crucible apparatus Cleveland, heat it with a heating rate of 6°With 1 minute to a temperature of 100°With, in the temperature range of 120-140°reduce heat to 2°With 1 minute, then visually memorize the location of the cells in the circuit, formed by air bubbles in the template, then transfer the outline onto the paper in a cage, cages calculate the magnitude of the surface area of the circuit and the value determines the percentage of liquid according to the standard, depending on the basis of the engine oil.

The invention is illustrated by drawings. Figure 1 shows the template for determining the size of air bubbles, figure 2 shows the pattern on the paper in the cage.

The template (figure 1) is a circle of wire with cells. The size of the template coincide with the dimensions of the inner diameter of the crucible apparatus Cleveland (GOST 4333-48), designed to determine flash point of petroleum products. The template is divided into cells: 29 total square cells, with the area of each square S=1 cm2, 8 incomplete square is cheek with S=0.75 cm 2, 8 incomplete square cells with S=0,375 cm2. The total area of the template is equal to 38 cm2and corresponds to 100%.

A specific example of implementation of the method.

When assessing the percentage of coolant in the engine oil in the crucible of the apparatus of Cleveland pour the oil to the specified level according to GOST 4333-48, then put on the crucible apparatus Cleveland template, then is heated so that the heating rate was 6°With 1 minute, to a temperature of 100°C. In the temperature range of 120-140°reduce heat to 2°With in 1 minute. On the surface of the crucible apparatus Cleveland formed the characteristic bubbles. Then visually memorize the location of the cells in the circuit formed by air bubbles in the template, then transfer the outline onto the paper in a cage. The cell count value of the surface area of the circuit and the value determines the percentage of the coolant according to the standard, depending on the fundamentals of motor oil: mineral, synthetic or semi-synthetic.

Example 1. Engine oil SAE 15W30 mineral-based.

Table 1 shows the reference values of the area allocated air bubbles depending on the content of the coolant in the engine oil.

Tab is .1
No.The contents of the coolant, %Area allocation of bubbles, %
100
20,136,0
30,252,1
40,582,64
51,0100

For example, the measured area was 40%. Table 1 define the location of this value: between the second and third row, in the interval 36,0 and 52.1. Make up a proportion and get the value of the coolant 0,12.

Example 2. Engine oil SAE 10W40 semi-synthetic.

Table 2
No.The contents of the coolant, %Area allocation of bubbles, %
100
20,128
30,259
40,578
51,089

For example, the measured area was 72%. Table 2 define the location of this value: between the third and fourth line, in the range of 59 and 78. Make up a proportion and which are square value content of the coolant 0,4.

Example 3. Engine oil SAE 5W40 synthetic.

Table 3
No.The contents of the coolant, %Area allocation of bubbles, %
100
20,158
30,271
40,586
51,097

Example 4. Used engine oil SAE 5W40

Area allocation of bubbles was 95%. According to the example 3, the content of the coolant between 0.5 and 1%.

To confirm the accuracy of the method, the water content in spent engine oil (example 4) was determined according to GOST 2477-44. It was 0.8%, which corresponds to the experimental data of example 3.

Thus, the claimed invention allows to increase the accuracy of determining the presence of coolant in the engine oil to determine its percentage content in an amount of 0.1 to 1 %and more.

In addition, the claimed invention allows to extend the functionality of the device Cleveland by detecting the presence and content of the coolant in the used motor oil.

The method of determining the content of the coolant in the thorn oil, which engine oil is heated and intensity characteristic of air bubbles determine the presence of coolant, characterized in that the first pattern, made of wire mesh, placed on the crucible apparatus Cleveland, then heat it with a heating rate of 6°With 1 minute to a temperature of 100°With, in the temperature range of 120-140°reduce heat to 2°With 1-minute, visually memorize the location of the cells in the circuit formed by air bubbles in the template, then transfer the outline onto the paper in the cell, the cell count value of the surface area of the circuit, then the value of this quantity determines the percentage of liquid according to the standard, depending on the basis of the engine oil.



 

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