Compensation of the error of automotive capacitive fuel level sensors when using them on special self-propelled rolling stock

Consumption of diesel fuel by the special rolling stock of Russian Railways per year amounts to tens of thousands of tons, and the issue of reliable accounting and control of its consumption is quite urgent. Currently, part of the special self-propelled rolling stock is equipped with on-board systems for measuring fuel consumption, however, in many units of this equipment, fuel control and accounting is carried out in manual mode. Massive introduction of on-board fuel consumption measurement systems on special self-propelled rolling stock is constrained, on the one hand, by the rather high cost of fuel sensors used on locomotives, on the other hand, by the increased error of relatively inexpensive automotive capacitive fuel level sensors. As part of the laboratory tests of such sensors, it was determined that when they operate on fuel of the same grade, the error corresponds to the passport and is at the level of 1 %, and when operating on fuel of different grades without additional recalibration, the error can reach 4 % or more. This is largely due to the simplified technology for measuring the amount of fuel in units of volume and insufficient compensation for changes in the density of diesel fuel. To solve this problem, an alternative to standard technology for determining the amount of fuel using automotive capacitive fuel level sensors is proposed, in which the dependence of the readings of these sensors on the fuel density at a standard temperature, once obtained in laboratory conditions, is used. Proposed technology of using automotive capacitive fuel level sensors on a special self-propelled rolling stock will allow keeping its relative reduced error at the level of 1 % and will provide measurement of the amount of fuel in units of mass.

1. Igin V. N., Zakhvatov A. V., Karyanin V. I. Avtomatizatsiya kontrolya raskhoda topliva [Automation of fuel consumption control]. Lokomotiv, 2015, no. 2, pp. 13 – 17.

2. Sidorova E. A., Davydov A. I. Sintez matematicheskoy modeli dlya normirovaniya raskhoda dizel'nogo topliva na spetsial'nom samokhodnom podvizhnom sostave [Synthesis of a mathematical model for standardizing the consumption of diesel fuel on a special self-propelled rolling stock]. Symbol of Science, 2016, no. 6, pp. 96 – 99.

3. Yakubov M. S., Mukhamedova Z. G. Analiz i otsenka energeticheskoy effektivnosti spetsial'nogo samokhodnogo podvizhnogo sostava zheleznoy dorogi [Analysis and assessment of the energy efficiency of special self-propelled rolling stock of the railway]. Journal of Transsib Railway Studies, 2018, no. 4, pp. 60 – 68.

4. Lempert A. A., Pletneva A. E., Guy F. F., Kazakov A. L. Modelirovanie i prognozirovanie raskhoda topliva dlya spetsial'nogo podvizhnogo sostava na VSZhD [Modeling and forecasting of fuel consumption for special rolling stock on the East Siberian Railway]. Modern technologies. System analysis. Modeling. 2011, no. 3 (31), pp. 96 – 101.

5. Adadurov A. S. Avtomatizirovannaya sistema kontrolya za rabotoy spetsial'nogo podvizhnogo sostava [Automated control system for the operation of special rolling stock]. Byulleten' Ob"edinennogo uchenogo soveta OAO “RZhD” [Bulletin of the Joint Scientific Council of the JSC Russian Railways], 2016, no. 6, pp. 29–35.

6. Poretskiy N. Kontrol' so “Sputnika” [Control from “Sputnik”]. Gudok, 2011, October 18. URL: http://www.gudok.ru/newspaper/?ID=692849 (retrieved on 02.06.2021).

7. Kontrol'no-diagnosticheskiy kompleks “Portal-SPS-01” [Control and diagnostic complex “Portal-SPS-01”]. SKB “Mayak” website, 2014, December 23. URL: http://www.skb-m.ru/products/43-kontrolno-diagnosticheskij-kompleks-portal-sps-01.html (retrieved on 11.06.2021).

8. Medyanik M. Pod kontrolem u “SADKO” [Under the control of “SADKO”]. Severnaya magistral', 2020, no. 062. URL: https://gudok.ru/zdr/179/?ID=1499952 (retrieved on 11.06.2021).

9. Instructions for metering diesel fuel on special railway rolling stock equipped with automated fuel metering systems. Approved by order of the JSC Russian Railways dated October 27, 2014 No. 2519r. ASPIZHT (retrieved on 02.06.2021) (in Russ.).

10. Methodology for rationing, planning and analysis of the use of diesel fuel at the SSPS according to the data of on-board systems or speed metering belts. Approved by order of the JSC Russian Railways dated December 24, 2015 No. 3060r. ASPIZHT (retrieved on 02.06.2021) (in Russ.).

11. Methods for planning and rationing fuel consumption for special rolling stock of the JSC Russian Railways. Approved by order of the JSC Russian Railways dated December 28, 2007 No. 2464r. ASPIZHT (retrieved on 02.06.2021) (in Russ.).

12. Muginshteyn L. A., Molchanov A. I., Popov K. M. Improvement of the system of accounting and control of fuel consumption of shunting diesel locomotives. Vestnik of the Railway Research Institute, 2010, no. 1, pp. 8 – 18.

13. Popov K. M. Izmerenie plotnosti dizel'nogo topliva pri uchete ego raskhoda [Measurement of the density of diesel fuel while taking into account its consumption]. Lokomotiv, 2013, no. 11, p. 35.

14. GOST 18481–81. Glass hydrometers and cylinders. General specifications. Interstate standard. Moscow, Standartinform Publ., 2007, 24 p. (in Russ.).

15. Instruction “Methods, means and procedure for measuring the amount of petroleum products during commodity accounting operations at the JSC Russian Railways”. Approved by order of the JSC Russian Railways dated August 20, 2019 No. 1791r. ASPIZHT (retrieved on 02.06.2021) (in Russ.).

16. GOST 8.587–2019. Mass of oil and oil products. Measurement procedures. Interstate standard, put into effect as nat. standard of the Russian Federation by order of the Federal Agency for Technical Regulation and Metrology of November 14, 2019 No. 1170-st. Moscow, Standartinform Publ., 2019, 50 p. (in Russ.).