Short-term fuel trim of petrol engine by oxygen sensor voltage during vehicle operation
https://doi.org/10.31660/2782-232X-2024-3-86-98
Abstract
The object of the study was fuel trim of the air-fuel mixture, in particular, short-term fuel trim by voltage change of the oxygen sensor installed before the catalytic converter during vehicle operation. Experimental studies were on the Bishkek – Osh (Kyrgyz Republic) highway at an altitude of 750–3200 m above sea level. It is characterized by flat, mountainous and high mountainous vehicle operating conditions. The experimental studies results were used to graph the dependence of short-term fuel trim on the change of oxygen sensor voltage during vehicle operation. The values of fuel trim parameters can be used to assess the state of the air-fuel mixture, as well as to make a conclusion about the technical condition of sensors, systems and mechanisms of the engine and elements of the car exhaust system. In addition, in normal operation of the engine, when the fluctuation of fuel correction indicators is ±10 %, fuel-economic and environmental indicators will be in fit. It should also be recognized that the modern automobile engines have a system of various sensors and electronic engine control unit, but they have their certain disadvantages in ensuring the stoichiometric composition of the air-fuel mixture (λ = 1).
Keywords
electronic engine control unit,
stoichiometric fuel-air mixture composition,
air-fuel ratio,
optimum fuel-air mixture composition,
pulse duration of injector opening,
fuel trim,
short-term fuel trim,
oxygen sensor voltage
Supporting agencies: The authors would like to thank G. S. Mamadieva for her assistance in the preparation of the manuscript before sending it to the editorial office.
About the Authors
B. U. Akunov
Kyrgyz State Technical University named after I. Razzakov
Kyrgyzstan
Kyrgyzstan
Bakytbek U. Akunov, Cand. Sci. (Engineering), Associate Professor in the Automobile Transport Department
Bishkek
K. A. Imarov
Kyrgyz State Technical University named after I. Razzakov
Kyrgyzstan
Kyrgyzstan
Kubatbek A. Imarov, Graduate Student in the Automobile Transport Department
Bishkek
References
1. Rokosch, U. Onboard Diagnostics = On-Board-Diagnose. Würzburg: Vogel Industrie Medien GmbH & Co. KG; 297. (In Germ.)
2. Kuranc A. Exhaust emission test performance with the use of the signal from air flow meter. Eksploatacja i Niezawodnosc – Maintenance and Reliability. 2015;17(1):129–134. https://doi.org/10.17531/ein.2015.1.17
3. Glazunov D. V., Glazunov V. I. Analysis for necessary improvement of car operating characteristics in the Kyrgyz Republic. Vestnik KRSU, 2014;14(12):149–152. (In Russ). Available at: http://vestnik.krsu.edu.kg/archive/78/3323.
4. Salova T. Yu., Tursunov A. A., Mazhitov B. Zh. Assessment of environmental performance of diesel engines under mountain operating conditions. Vestnik Tadzhikskogo tekhnicheskogo universiteta. 2011;1:91–98. (In Russ.) Available at: https://elibrary.ru/item.asp?id=16546182
5. Glazunov D. V. Calculation of a car engine, working in the Kyrgyz Republic. Nauka i novye tekhnologii. 2011;9:29– 32. (In Russ.) Available at: https://elibrary.ru/item.asp?edn=vjwjnp.
6. Glazunov D. V., Glazunov V. I. Influence of high-heavy and high-temperature conditions for the process of mixture formation automobile petrol engine and the peculiarities of its combustion. Vestnik KRSU. 2017;17(12):55–58. (In Russ.) Available at: http://vestnik.krsu.edu.kg/archive/34?heading=4181.
7. Glazunov D. V. Influence of high-temperature conditions of the Kyrgyz Republic on the performance of a car carburettor engine. Vestnik KRSU. 2013;13(7):136–138. (In Russ.) Available at: http://vestnik.krsu.edu.kg/archive/86/3704.
8. Glazunov D. V. The influence of high-mountainous conditions of the Kyrgyz Republic on running cycle of a car carburetted engine. Vestnik KRSU. 2014:14(2):114–118. (In Russ.) Available at: http://vestnik.krsu.edu.kg/archive/66/2701.
9. Ashok B., Ashok D., Ramesh Kumar C. A review on control system architecture of a SI engine management System. Annual Reviews in Control. 2016;(41):94–118. Available at: https://www.academia.edu/31325688/A_review_on_control_system_architecture_of_a_SI_engine_management_system. 10. Akunov B. U. Correction of the air-fuel mixture during vehicle operation under various conditions. Transport: science, equipment, management. 2019;(4):21–24. (In Russ.) Available at: http://lamb.viniti.ru/sid2/sid2free?sid2=J1763779920.
10. Akunov B. U. Analysis of the concentration of residual oxygen in the exhaust gases of the vehicle depending on the terrain. Avtomobil'naya promyshlennost'. 2016;(5):28–30. (In Russ.). Available at: https://www.elibrary.ru/item.asp?edn=tvjuhu.
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Review
For citations:
Akunov B.U., Imarov K.A. Short-term fuel trim of petrol engine by oxygen sensor voltage during vehicle operation. Architecture, Construction, Transport. 2024;(3):86-98. (In Russ.) https://doi.org/10.31660/2782-232X-2024-3-86-98
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