Modern methods of synthesis of automatic planetary gearboxes

Abstract

An increase in the number of gears in automotive transmissions is the most efficient way to reduce fuel consumption and improve the efficiency of automotive vehicles equipped with internal combustion engines. The more gears in the gearbox, the more complicated become the used mechanisms and their number increases as well. The article is devoted to the currently used methods of synthesis and design of automotive multi-speed transmissions consisting of planetary mechanisms. Restrictions on the type of planetary mechanisms used and the number of degrees of freedom of synthesized boxes led to a low efficiency of using mathematical and graphoanalytical methods of synthesis developed in the USSR. Currently analytical synthesis method is an exhaustive search of the possible embodiments of joining planetary mechanisms and control elements. This method provides the possibility of using only single-row three-link planetary mechanisms with correct mathematical description. The second basic way of designing planetary gearboxes is the modular principle of synthesis, which consists in attaching and combining some known and used designs with others. In this case, the main modules are single-row planetary gears with single-pair or pair-wise satellites and planetary gears developed by Simpson and Ravigneaux. Most gearboxes developed by German companies are obtained using this particular approach. The article presents kinematic schemes of gearboxes, currently used in transmissions of modern cars, which are obtained as a result of using the described methods of synthesis.

Keywords

synthesis of mechanisms / design / planetary transmission / gearbox / automatic transmission / transmission / reduced fuel consumption / increased efficiency

References

[1] Dorfschmid J., Dopper W., Jaggle G., Heukelbach K. Evolution to the seven-speed automatic transmission 7G-Tronic Plus // ATZ 1212010. Vol. 112, pp. 20-25.

[2] Heading for a whole new dimension. 9HP 9-speed automatic transmission for passenger cars // Brochure by ZF Friedrichshafen AG. URL: www.zf.com.

[3] Харитонов С.А. Автоматические коробки передач. М.: ООО «Издательство Астрель»: ООО «Издательство АСТ», 2003. 335 с.

[4] Шарипов В.М. Конструирование и расчет тракторов. М.: Машиностроение, 2009. 752 с.

[5] Нагайцев М.В., Харитонов С.А., Лысков А.В. Гидромеханическая коробка передач: патент на изобретение № RU2309309. Опубликовано 27.10.2007. Бюл. № 30.

[6] Raghavan M., Bucknor N., Maguire J., Hendrickson J., Singh T. The Algebraic Design of Transmissions & EVTs // Paper # 2007-01-1458. SAE International.

[7] Raghavan M., Kao Chi-Kuan, Usoro P.B. Family of Multi-Speed Planetary Transmission Having Fixed Interconnections And Six Torque-Transmitting Mechanisms: патент на изобретение № US6679802. Опубликовано 20.01.2004.

[8] Raghavan M., Bucknor N.K., Usoro P.B. Planetary Transmission Having A Stationary Member And Input Clutches: патент на изобретение № US7101302. Опубликовано 05.09.2006.

[9] Lewis C., Bollwahn B. General Motors Hydra-Matic & Ford New FWD Six-Speed Automatic Transmission Family. Paper # 2007-01-1095. SAE International.

[10] Schweinsberg C. Honda Details Front-Engine, Front-Wheel-Drive 10AT on Odyssey // WardsAuto. 04.04.2017. URL: http://wardsauto.com/technology/honda-details-front-engine-front-wheel-drive-10at-odyssey.

[11] Shibamura M., Sugino S., Iizuka K. Automatic transmission: патент на изобретение № US8992374. Опубликовано 31.03.2015.

[12] Simpson H.W. Planetary Transmission for Self-Propelled Vehicle: патент на изобретение № US2856794. Опубликовано 21.10.1958.

[13] Pierre Lepelletier Receives SAE International Award Recognition // URL: http://www.sae.org/servlets/pressRoom?OBJECT_TYPE=PressReleases&PAGE=showRelease&RELEASE_ID=1274.

[14] Ravigneaux P. Changement de vitesse épicycloïdal à 6 roues: патент на изобретение № FR48019. Опубликовано 16.10.1937.

[15] Lepelletier P. Multispeed Automatic Transmission for Automobile Vehicles: патент на изобретение № US5106352. Опубликовано 21.04.1992.

[16] Haupt J. Automatic Gearbox: патент на изобретение № US6729990. Опубликовано 04.05.2004.

[17] Ried K. Planetary Speed Change Transmission: патент на изобретение № US6302820. Опубликовано 16.10.2001.

[18] Kondo M., Hasegava Y., Takanami Y., Arai K., Tanaka M., Kinoshita M., Ootsuki T., Yamaguchi T., Fukatsu A. Toyota AA80E 8-Speed Automatic Transmission with Novel Powertrain Control System. Paper # 2007-01-1311. SAE International

[19] Diosi G., Haupt J., Gumpoltsberger G. и др. Multispeed Transmission: патент на изобретение № WO2006074707. Опубликовано 20.07.2006.

[20] Harmon K.B. The History of Allison Automatic Transmissions for On-Highway Trucks and Buses. Paper # 982791. SAE International.

[21] 9-Speed Automatic Transmission // URL: http://www.zf.com/corporate/en/products/innovations/9hp_automatic_transmission/9hp_automatic_transmission.html.

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Salamandra K.B.