See discussions, st ats, and author pr ofiles f or this public ation at : https://www .researchgate.ne t/public ation/317339502 SYSTEMATIZATION OF PLANETARY GEAR SET CONFIGURATIONS WHICH ARE IMPLEMENTED IN AUTOMATIC TRANSMISSIONS Article · Sept ember 2015 CITATION 1READS 5,016 2 author s: Some o f the author s of this public ation ar e also w orking on these r elat ed pr ojects: Tribologic al char acteristics of aluminium hybrid c omposit es. View pr oject Analysis of F unctionally Gr aded Plat e View pr oject Stefan Ili ć Solfins 3 PUBLICA TIONS    1 CITATION     SEE PROFILE Blaz a St ojano vic Univ ersity of Kr aguje vac 142 PUBLICA TIONS    876 CITATIONS     SEE PROFILE All c ontent f ollo wing this p age was uplo aded b y Blaz a St ojano vic on 04 June 2017. The user has r equest ed enhanc ement of the do wnlo aded file.- 21 - SYSTEMATIZATION OF PLANETARY GEAR SET CONFIGURATIONS WHICH ARE IMPLEMENTED IN AUTOMATIC TRANSMISSIONS SISTEMATIZACIJA KONFIGURACIJA PLANETARNIH PRENOSNIKA IMPLEMENTIRANIH U AUTOMATSKIM MENJAČIMA Stefan Ilić, Master student , Ph.D Blaža Stojanović, Assistant professor 1 Faculty of Engineering , University of Kragujevac, SERBIA, E -mail: ilic.stefan93@gmail.com, blaza@kg.ac.rs Apstract: Most common planetary gear sets which are implemented in numerous automatic transmission systems are presented in this paper. Automatic transmissions in which these gear sets are implemented were also briefly mentioned. Alongside these topics, cutting edge automatic transmission systems alongside their schematics were also presented. Current industry developments and future of automatic transmission systems w ere also briefly analyzed . Key words : Automatic trans mission , Ravigneaux gear set , Lepelletier gear set , Simpson gear set Abstrakt: Najčešći planetarni prenosnici koji se primenjuju u brojnim automatskim menjačima su opisani u okviru ovog rada. Automatski menjači u kojima su ovi prenosnici napomenuti su takođe kratko opisani. Pored ovih tema, predstavljeni su i najsavremeniji automatski menjači kao i njihove šeme. Trenutni trendovi u industriji i budućnost automatskih menjača je takođe ukratko analizirana. Ključne reči: Automatski menjači, Ravigneaux prenosnik, Lepelletier prenosnik, Simpson prenosnik 1. INTRODUCTION The history of modern automatic transmission systems starts during 1950 -s when most manufacturers started to implement these devices in passenger vehicles , [1] . Since then, several companies in automotive industry developed better systems, which found application in numerous passenger and commercial vehicles . Although manual transmission syste ms still represent b iggest part of the automotive transmission market, customers in certain parts of the world (NAFTA region) nowadays can’t imagine a vehicle without automatic transmission systems, [1]. Main advantage of these systems is perceived in the automatic gear shifting which in return provides safer and better driving experience for the customer. Automatic transmissions also possess certain drawbacks which are mainly perceived through somewhat higher fuel consumption, more complex and expensive system with increas ingly complex and expensive maintenance procedures [1, 2]. These disadvantages are meaningful because they are contradictory with the goals of the automotive industry which are mainly focused on the production of cheaper, efficient and reliable passenger vehicles. On the market, o ne can find numerous devices which enable automatic gear shifting. Biggest part of the market certainly represent gear based automatic transmissions (AT). Besides system s based on this principle , automotive companies also implement Continuous Vehicle Transmission systems (CVT), and Dual Cl utch Transmission systems (DCT), [1]. - 22 - Within the scope of this paper, numerous planetar y gear sets which are implemented within auto