INFLUENCE OF MAIN GEAR RATIO ON CAR FUEL EFFICIENCY IN THE DRIVE CYCLE

Introduction. The article presents the improvement efficiency of fuel and economic properties of the vehicle in WLTC driving cycle by means of the main gear ratio changing.

Materials and methods. Great attention is paid to the fuel consumption determination by the numerical simulation of the moving process in the driving cycle. To illustrate this process, a continuous function of the vehicle speed and various mathematical models of the internal combustion engine characteristics – based on the classical theory, and also on the basis of experimental studies with additional account of transient modes – is formed in the research.

 Results. Therefore, the corresponding values of the mass fuel consumption and the gear shifting algorithm are proposed in the article.

 Discussion. The obtained results allow to carry out the effect of individual gear ratios’ evaluation on the fuel and economic efficiency of the vehicle in the prospective World Harmonized Driving Cycle with additional consideration of the traction and speed performance changing.

Сonclusion. It can be concluded that the calculation methods used in the research could be applied for solving the problems of complex optimization synthesis of structural and regime parameters in mechanical transmissions of modern automobiles.

1. Gusakov S.V., Markov V.A., Behdzhujan H. Raschetnyie issledovaniya avtomobilnoy silovoy ustanovki s sistemoy rekuperatsii energii [Calculation studies of an automobile power plant with an energy recovery system]. Proceedings of Higher Educational Institutions. Маchine Building, 2016, no 671, pp. 20 – 27.

2. Litvinov A.S. Avtomobil: Teoriya ekspluatatsionnykh svoystv: Uchebnik dlya vuzov po spetsialnosti “Avtomobili i avtomobilnoye khozyaystvo”, [Car: The theory of operational properties: A textbook for high schools on the specialty “Cars and Automobile Economy”]. Moscow, Mechanical engineering, 1989. 240 p.

3. State Standard 41.101-99. Moscow, IPK Standartinform Publ., 2001. 41p.

4. Predlozhenie po novym global’nym tehnicheskim pravilam, kasajushhimsja vsemirnyh soglasovannyh procedur ispytanija transportnyh sredstv maloj gruzopodemnosti [Proposal for a new global technical regulation on the Worldwide harmonized Light vehicles Test Procedure (WLTP)]. Available at http://www.unece.org/fileadmin/DAM/trans/doc/2014/wp29/ECE-TRANS-WP29-2014-027e.pdf (accessed 05 November 2017).

5. Narkevich E.I. Metody kompleksnogo issledovaniya tyagovo-skorostnykh svoystv i toplivnoy ekonomichnosti gorodskikh avtobusov. avtoref. dis. kand. tekh. nauk [Methods for a comprehensive study of traction-speed properties and fuel economy of city buses, abstract Diss. of Ph.D.]. Moscow, 1982. 16p.

6. Tokarev A.A. Giperbolicheskiy ryad peredatochnykh chisel transmissii [Hyperbolic series of transmission ratio]. Automotive industry, 1975, no. 10, pp. 16 – 18.

7. Govorushchenko N.Ya. Ekonomiya topliva i snizheniye toksichnosti na avtomobilnom transporte [Fuel economy and toxicity reduction in road transport]. Moscow, Transport, 1990, 135 p.

8. Pavlenko V.A. Povysheniye toplivnoy ekonomichnosti avtomobilya optimizatsiyey parametrov sistemy “dvigatel – transmissiya” dis. kand. tekh. nauk [Improving the fuel economy of the car by optimizing the parameters of the engine-transmission system. Diss. of Ph. D.]. Kharkiv, KhNAHU, 2004. 178p.

9. Adyasov A.Yu. Razrabotka metodiki vybora peredatochnykh chisel transmissii avtomobilya na osnove ratsionalnogo sochetaniya tyagovo-skorostnykh svoystv. toplivnoy ekonomichnosti i toksichnosti vykhlopnykh gazov: dis. kand. tekh. nauk [Development of a technique for selecting transmission ratios of the car’s transmission based on a rational combination of traction-speed properties, fuel efficiency and exhaust toxicity. Diss. of Ph.D.]. Nizhny Novgorod, NNSTU, 2002. 200p.

10. Blokhin A.N. Razrabotka metodiki poiska ratsionalnykh peredatochnykh chisel transmissii s uchetom ekspluatatsionnykh svoystv i naznacheniya avtomobilya: dis. kand. tekh. nauk Development of a technique for the search for rational transmission ratios of the transmission, taking into account the operational properties and purpose of the vehicle Diss. of Ph.D.]. Nizhny Novgorod, NNSTU, 2006. 256p.

11. Rusakov S.S. Razrabotka metodiki optimizatsii peredatochnykh chisel mekhanicheskoy stupenchatoy transmissii legkovogo avtomobilya s uchetom rezhimov raboty ego dvigatelya: dis. kand. tekh. nauk [Development of a technique for optimizing the gear ratios of a mechanical step-by-step transmission of a passenger car, taking into account the operating modes of its engine. Diss. of Ph.D.]. Izhevsk, ISTU, 2007. 134p.

12. Savenkov N.V. Metod vyibora peredatochnyih chisel transmissii avtomobilya kategorii N1 na osnove ezdovogo tsikla [The method of selecting transmission ratios of the N1 category car transmission based on the driving cycle]. Vestnik KuzSTU, 2016, no. 2, pp.158 – 165.

13. D.V. Aroslankin Avtomobili semeystva «GAZel Biznes». Rukovodstvo po ekspluatatsii 3302-3902010-20 RE. Trete izdanie [Cars of the GAZel Business family. Manual 3302-3902010-20 RE. Third Edition] Nizhny Novgorod, GAZ, 2011. 88 p.

14. Berezin E.B., Hasyanov N.I., Ulanov O.A. Ustroystvo, remont i tehnicheskoe obsluzhivanie UMZ-4213, UMZ-4216 Evro-3 [Device, repair and maintenance UMZ-4213, UMZ4216 Euro-3]. Ulyanovsk, UMZ, 2008, 69 p.

15. Gorozhankin S. A., Shitov A. A., Savenkov N. V., Metodiki dlya approksimatsii zavisimostey neskolkih peremennyih v programmnoy srede MS Excel i Mathcad [Techniques for approximating the dependencies of several variables in the MS Excel and Mathcad software environment], Ntv SpbSTU, 2016, no 247, pp.35 – 47.

16. Kiryanov D.V. Mathcad 14, Saint Petersburg, BHVPetersburg, 2007. 704p.

17. Akatov E.M., Belov P.M., D’jachenko N.H., Musatov B.C. Rabota avtomobilnogo dvigatelya na neustanovivshemsya rezhime [The operation of the car engine at an unsteady state]. Moscow-Leningrad, Mechanical engineering, 1960. 282 p.

18. State Standard 22576-90. Motor vehicles. Speed characteristics. Test methods. Moscow, Standartinform Publ., 1990. 15 p.

19. Savenkov N.V. Optimizatsiya rezhimov silovoy ustanovki avtomobilya dlya povyisheniya ego toplivnoy ekonomichnosti [Optimization of the modes of the power plant of the car for increasing its fuel efficiency]. Automotive industry, 2016, no 6, pp. 12 – 18.

20. Savenkov N.V. Metod vyibora peredatochnyih chisel silovoy ustanovki avtomobilya kategorii N1 na osnove ezdovogo tsikla: dis. kand. tekh. nauk [The method of choosing the gear ratios of the power plant of a car of category N1 on the basis of a driving cycle. Diss. of Ph.D.]. Moscow, 2017. 206p.