SU1495656A1 - Device for measuring thickness of oil film in i.c. engine cylinder - Google Patents

Abstract

The invention relates to mechanical engineering and is intended to improve the accuracy of measuring the thickness of the oil film in the cylinder of an internal combustion engine. A transparent element 4 is mounted in the wall of the cylinder liner 1, connected by two light guide branches in series with an ultraviolet light filter 8, a heat protection light filter 7, a lens 6, an ultraviolet radiator 5 and a locking yellow light filter 12 and a photomultiplier 13, which is electrically connected to the amplifier 15 and an oscilloscope 18 associated with the piston position sensor 17. 1 il.

Description

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The invention relates to the field of mechanical engineering and can be used for testing internal combustion engines for studying oil distribution in a cylinder.

The purpose of the invention is to improve the accuracy of measuring the thickness of the oil film.

The drawing shows a general device diagram.

The device is made on the basis of single-phase transmission of maximum light luminescence of oil. In this case, the branch 11 of the fiber poorly transmits the reflected excitatory ultraviolet light and plays the role of an additional filter, reducing the parasitic signal caused by the inconsistency of the excitation and blocking light filters.

The diameter of the working surface of the photocathode of the photomultiplier 13 should be

an internal combustion engine of 10-12 mm in diameter to obtain a maximum and contains a cylinder liner with an electric signal diameter from the oil luminescence light.

The heat-shielding light filter 7, which cuts off the long-wavelength part of the radiation of the mercury film by reducing the parasitic signal due to the better cross-breeding of the exciting light filter 8 and the locking light filter 12. The coefficient is 150 mm, gap 2 with the piston ring 3, transparent element 4, made from an org- ger, 4, made with an orgfixed pickle 2, a transparent element 4, made from, for example, an orthopteel ring 4, made of, for example, an orgital filter, 4, with a piston ring 3, an orgital filter, 4, made from an orgital filter, made from an organdal filter, cut out of the parasitic signal. and mounted in the wall

cylinder liner 1, ultraviolet radiant 15 quartz lamp 5, designed for the reader 5, which used to increase the measurement accuracy of the thickness of the mercury quartz lamp, lens 6, heat-proof blue-green light filter 7, exciting ultraviolet light filter 8 , light guide 9, which on the one hand

in contact with the transparent element 4, and from the 20th start-up of the light filter 7 in the length range of the other side forked, one branch of the waves 700-780 nm is 8-16%. 10 is in contact with the excitation light. In order to improve the measurement accuracy of tolfilter 8, the second branch AND contact of the oil layer on the disk 16 has a locking yellow filter 12.120 of the radial slots, uniformly dismounting it also has a photomultiplier 13, 25 circumferentially (after three - enclosed in a metal casing 14, the crankshaft gate). At the same time for

The readability of the oscillogram, the two diametrically opposite slots corresponding to the positions of the upper and lower dead points, are 0.75–30 and 2.5 mm wide, respectively, and the remaining slots are 1.5 mm wide.

an amplifier 15, a disk 16 mounted on an engine crankshaft (not shown), a piston position sensor 17 (made, for example, in the form of a photoelectric sensor), a storage oscilloscope 18.

In this case, to eliminate the influence of the curvature of the inner surface, the diameter of the transparent element 4 is selected from the condition

DM, (0.01-0.03) D,., Where D is the diameter of the transparent element;

The device works as follows.

Porschen 2 with ring 3 reciprocates in sleeve 1. Radiation from a quartz mercury-quartz lamp 5 Pro Dii — the diameter of the engine cylinder is internally wired through the focusing lens 6, the heat radiation that makes up the protective light filter 7 and excites

the light filter 8. In this case, the heat-shielding blue-green light filter 7 sharply reduces the intensity of the visible long-wave and near-infrared portions of the radiation of a mercury-quartz lamp. Exciting ultraviolet light filter 8 highlights

3 mm.

The inner surface of the transparent element is machined together with the working surface of the cylinder liner 1, and the outer surface of the transparent element is flat and polished.

For the convenience of adjusting and reducing the influence of misalignment of the transparent element and the light guide, the light diameter of the wavelength of the indicated radiation is the longwave ultraviolet and shortwave visible parts, which represent the conduit 9 at the point of contact with the transmitting radiation. The exciter element 4 is equal to 1.1 -1.2 of the diameter of the transparent element. The light diameter of the branch 10 of the light guide 9 is 0.3-0.5 of the light diameter of the branch 11 and is 1.4-1.5 mm, based on the conditions of transmission along the branch 10 of the light guide 9 falls on the transparent element 4 and the oil layer on the inside the surface of the cylinder liner 1, excites luminescence in it. In this case, the loss of the exciting candle of the necessary luminous intensity and minimum of 50 tons is minimal due to the fact that the branch

vii transmit maximum light luminescence oil. In this case, the branch 11 of the fiber poorly transmits the reflected excitatory ultraviolet light and plays the role of an additional filter, reducing the parasitic signal caused by the inconsistency of the excitation and blocking light filters.

The diameter of the working surface of the photocathode of the photomultiplier 13 should be

8-12 mm to obtain maximum electrical signal from oil luminescence.

The mercury wavelength of a quartz lamp 5 is designed to increase the accuracy of measuring the thickness of the oil film by reducing the parasitic signal due to the better crossover of the exciting light filter 8 and the blocking light filter 12. The coefficient of a quartz-shaped lamp 5 is designed for - Increasing the accuracy of measuring the thickness of the massed filter 7 in the 700-780 nm wavelength range is 8-16%. To improve the accuracy of measuring the tolys of the long-wavelength ultraviolet and short-wavelength visible radiation, which represent the exciting radiation. The exciting radiation along the branch 10 of the light guide 9 hits the transparent element 4 and the oil layer on the inner surface of the liner 1 of the cylinder, exciting luminescence in it. At the same time, the loss of the excitatory

loss of signal from the oil film. This branch of the light guide is designed to transmit ultraviolet and blue light of high intensity and therefore is made of quartz glass. The second branch 11 of the optical fiber 9 is made of quartz glass, and there is no air gap between the flat end surface of the optical fiber 9 and the flat outer surface of the transparent element 4. Since the diode 9 is intended to transmit light55, the meter of the transparent element 4 is

luminescence of the oil and therefore made 0.01-0.03 of the diameter of the cylinder liner 1,

from ordinary glass. The light diameter, due to the influence of the curvature of the inner surface 11, is 3.4–3.6 mm, based on the intensity of the transparent element.

10 of the light guide 9 is made of quartz glass, and there is no air gap between the flat end surface of the light guide 9 and the flat outer surface of the transparent element 4. Since the diameter of the transparent element 4 is

luminescence is negligible. The luminescence of the oil together with the reflected excitation light enters the transparent element 4 and further into the 1G branch of the light guide 9. The excess of the light diameter of the light guide 9 over the diameter of the transparent element 4 1.1 -1.2 times causes the installation to be insensitive to the misalignment of the transparent element and the light guide, as well as the minimum amount of light loss of luminescence in the transition from the transparent element 4 to the light guide 9. Moreover, due to the difference in light diameters of the branches 10 and 11 of the light guide 9, about 80% of the luminescence of the oil leaving the

ten

differ from each other and from other pulses in width due to differences in the width of the corresponding disk slots.

Using waveform data, the thickness of the oil film in micrometers is determined from the calibration graph.

Claims (1)

Invention Formula violet light and at the same time well passes light lumi nescentsii. A more complete separation of the luminescence light from the reflected device for measuring the thickness of the oil film in the cylinder of an internal combustion engine, containing a cylinder liner with a hole, a piston, a transparent transparent element falls into branch 11. 5 element, ultraviolet emitter, lin- - tooth, photomultiplier, amplifier, oscillatory. intensively absorbs the reflected ultra-graph, light guide, exciting and blocking light filters and piston position sensor, and a transparent element . Placed in a hole in a cylinder tube of exciting light occurs at the gate and is connected to the photomultiplier yellow light filter 12 by a light guide. Next, the luminescence of the luminescence falls on the cathode of the photomultiplier electrically multiplier 13 and causes the last luminescence associated with an amplifier and an oscilloscope, the change in anode voltage, which is also proportional to the sensor position of the pore thickness of the oil film. At 25 shn, characterized in that, for the purpose of the poet, the full use of higher precision light occurs, the device contains thermal luminescence due to the fact that the diameter of the safety filter installed on the working surface of the photocathode photo-between the lens and the exciting light filter 13 is 10 mm . The signal is photomusum, the light guide is made in the form of two branches, multiplying 13 is fed to the amplifier 15, respectively, connecting the transparent and then to the storage oscilloscope 18. 30 element with exciting and locking Parallel to the oscilloscope screen, light filters the first branch is equal to 0.3-0.5 light diameter of the second branch; the total light diameter of the fiber at the point of its contact with the transparent element is 1.1 -1.2 16 rotates together with the cranked diameter of the last 35, the diameter of which is scrap engine The pulses of the positions of the piston-turn are 0.01-0.03 diameters in the upper and lower dead points of the cylinder liner. Records pulses from the piston position sensor 17 connected to the disk 16, every 3 ° rotation of the engine crankshaft. With this drive differ from each other and from other pulses in width due to differences in the width of the corresponding disk slots. Using waveform data, the thickness of the oil film in micrometers is determined from the calibration graph. ten Invention Formula