Analysis of Possibility of Engine Operation with Minimum Fuel Consumption

The article describes a method of increasing fuel efficiency of internal combustion engines through organizing the work of the engine in the modes corresponding to the minimum values of specific efficient fuel consumption. A method for plotting the minimum value curve of the specific efficient fuel consumption on the field of engine universal characteristics was developed.  The application of the proposed method is illustrated for Liebherr diesel engines that are used in heavy trucks and construction equipment. The analysis shows that the possibilities of economy mode setting for engines in power installations with mechanical transmission are rather limited. In combined power installations with an electrical type transmission there is a flexible link between the engine and transmission components, due to which the engine work can be organized in the modes that correspond to the minimum specific fuel consumption. In order to optimize engine fuel efficiency, the control system must set the engine governor in such a speed mode that corresponds to the optimal relationship between the engine shaft rotation speed and engine power. The optimal dependencies of the rotation speed on the power are obtained for Liebherr diesel engines.

References

[1] Kuznetsov A.G., Markov V.A., Shatrov V.I., Furman V.V., Afanas’ev V.N. Metodika otsenki raskhoda topliva i vybrosov toksichnykh komponentov otrabotavshikh gazov transportnogo dizelia na neustanovivshikhsia rezhimakh [Methodology to evaluate fuel consumption and emissions of toxic components of exhaust gases of diesel vehicle in the transient regime]. Mezhdunarodnyi simpozium «Obrazovanie cherez nauku», posviashchennyi 175-letiiu MGTU im. N.E. Baumana [International Symposium «Education through Science», dedicated to the 175th anniversary of the ВMSTU]. Moscow, Bauman Press, 2005, p. 94.

[2] Leonov D.I., Leonov I.V. Metody uluchsheniia ekonomichnosti mashin s dvigateliami vnutrennego sgoraniia pri proektirovanii [Methods to Improve Efficiency of Machines with Internal Combustion Engines in Designing]. Vestnik MGTU im. N.E. Baumana. Ser. Mashinostroenie [Herald of the Bauman Moscow State Technical University. Mechanical Engineering]. 2008, no. 2, pp. 39–51.

[3] Barbashov N.N., Leonov I.V. Vybor optimal’noi moshchnosti dvigatelia vnutrennego sgoraniia gibridnoi silovoi ustanovki [Selection of Optimal Power of Internal Combustion Engine of Hybrid Power Plant]. Vestnik MGTU im. N.E. Baumana. Ser. Mashinostroenie [Herald of the Bauman Moscow State Technical University. Mechanical Engineering]. 2010, no. 4, pp. 47–54.

[4] Leonov I.V. Snizhenie raskhoda energii pod"emno-transportnykh mashin v tsikle razgontormozhenie [Reduction in Power Consumption of Hoisting and Transport Cars in Acceleration-Deceleration Cycle]. Vestnik MGTU im. N.E. Baumana. Ser. Mashinostroenie [Herald of the Bauman Moscow State Technical University. Mechanical Engineering]. 2014, no. 1(94), pp. 99–110.

[5] Robert «Bobby» Grisso, John V. Perumpral, Gary T. Roberson, Robert Pitman. Predicting Tractor Diesel Fuel Consumption. 2014, pp. 1–11. Available at: https://pubs.ext.vt.edu/442/442-073/442-073_pdf.pdf (accessed 12 May 2015).

[6] Dar’enkov A.B., Khvatov O.S. Sistema upravleniia avtonomnym dizel’-generatorom peremennoi chastoty vrashcheniia [Control system of autonomous diesel generator characterized by alternating frequency rotation of shaft]. Trudy Nizhegorodskogo gosudarstvennogo tekhnicheskogo universiteta im. R.E. Alekseev [Proceedings of the Nizhny Novgorod State Technical University named after R.E. Alekseev]. 2013, no. 5(102), pp. 303–308.

[7] Dar’enkov A.B., Khvatov O.S., Iurlov F.F., Usov N.V. Tekhniko-ekonomicheskoe obosnovanie primeneniia dizel’-generatornykh elektrostantsii s peremennoi chastotoi vrashcheniia vala [Technical-economic basis of the use of diesel electric power station characterized by alternating frequency rotation of shaft]. Trudy Nizhegorodskogo gosudarstvennogo tekhnicheskogo universiteta im. R.E. Alekseev [Proceedings of the Nizhny Novgorod State Technical University named after R.E. Alekseev]. 2014, no. 3(105), pp. 210–214.

[8] Ivashchenko N.A., Kuznetsov A.G., Kharitonov S.V., Kuznetsov S.A. Modelirovanie protsessov upravleniia transportnym sredstvom s dizelem i elektricheskoi transmissiei [Simulation of the processes of driving transport vehicle with diesel and electric drivetrain]. Vestnik Volgogradskogo gosudarstvennogo universiteta. Seriia 10. Innovatsionnaia deiatel’nost’ [Science Journal of Volgograd State University. Technology and innovations]. 2014, no. 5(14), pp. 68–77.

[9] Diesel Engines by Liebherr. Available at: https://docviewer.yandex.ru/?url=ya-serp%3A%2F% 2Fwww.liebherr.com%2FCP%2Fen-GB%2Fdefault_cp.wfw%2Ftab-131726%3Ffile%3D~% 2FCMS%2Fdownloads%2FBP_Dieselmotoren_28S_en_web.pdf&lang=en&c=5559cddf3525 (accessed 12 May 2015).

[10] Eto dizel’-elektricheskaia transmissiia [This diesel-electric powertrain]. Available at: http://www.liebherr.com/CP/ru-RU/132422.wfw (accessed 12 May 2015).

[11] Kuznetsov A.G. Dinamicheskaia model’ energeticheskoi ustanovki teplovoza [Dynamic Model of Power Generating Unit for Diesel Locomotive]. Vestnik MGTU im. N.E. Baumana. Ser. Mashinostroenie [Herald of the Bauman Moscow State Technical University. Mechanical Engineering]. 2009, no. 3, pp. 49–56.

[12] Kuznetsov A.G., Kharitonov S.V., Latochkin A.A. Matematicheskaia model’ dizelia kak istochnika energii transportnoi ustanovki s elektricheskoi transmissiei [Mathematical model of diesel engine as energy generator for vehicle with electrical transmission]. Gruzovik [Truck]. 2014, no. 7, pp. 11–14.