Utjecaj automatskih mjenjača na eksploatacijske značajke cestovnih motornih vozila

undergraduate thesis

• Title (english): Impact of Automatic Transmission System on Exploitation Characteristics of Road Motor Vehicles
• Author: Želimir Velić
• Mentor: Željko Šarić (mentor)
• Committee member: Goran Zovak (predsjednik povjerenstva)
• Committee member: Ivo Jurić (član povjerenstva)
• Committee member: Marijan Rajsman (član povjerenstva)
• Granter: University of Zagreb; Faculty of Transport and Traffic Sciences; (Division of Transport); (Department of Road Transport); Zagreb
• Defense date and country: 2018-09-17, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Traffic and Transport Technology; Road and Rail Transport

Abstract

Transmisija je jedan od najvažnijih i najsloženijih mehaničkih sustava na cestovnim motornim vozilima čija je zadaća transformacija i prijenos snage, okretnog momenta i brzine rotacije s motora na pogonske kotače s ciljem dobivanja što veće efikasnosti motora i samim time što boljih izlaznih karakteristika motora, odnosno vozila. Mjenjači čine najvažniju komponentu u transmisiji jer imaju izravnu ulogu u promjeni okretnog momenta i brzine na pogonskim kotačima, promjeni smjera kretanja vozila unaprijed ili unatrag, te prekidu prijenosa okretnog momenta i omogućavanju rada motora dok je vozilo zaustavljeno. Prvi mjenjači su bili ručni mjenjači i bili su jednostavno izvedeni i samim time jeftini za izradu, ugradnju i popravak, te su zahtijevali da vozač sam odabire željeni stupanj prijenosa. Daljnjim razvojem vozila došlo je do pojave automatskih mjenjača koji nisu zahtijevali od vozača da bira stupanj prijenosa tijekom vožnje, već samo odabir smjera kretanja vozila prilikom kretanja iz stacionarnog položaja. Takve značajke su omogućile vozaču jednostavniju i ugodniju vožnju, ali neki od nedostataka su bili sporija promjena stupnja prijenosa, slabije ubrzanje vozila i povećana potrošnja goriva. Zbog svoje kompleksnosti, automatski mjenjači su bili skuplji za proizvodnju i održavanje, a često su imali veću masu nego ručni mjenjači. Razvojem novih tehnologija prethodnih nekoliko godina smanjuju se nedostaci automatskih mjenjača i njihova upotreba je sve veća. U ovom radu će biti prikazan cjelokupan sustav transmisije cestovnih motornih vozila, uz naglasak na automatske mjenjače i vrste istih, te njihov utjecaj na eksploatacijske značajke cestovnih motornih vozila.

Abstract (english)

Transmission is one of the most important and most complex mechanical systems on road motor vehicles whose task is to transform and transfer power, torque and speed from the engine to the drive wheels in order to obtain the most efficient engine efficiency and better performance characteristics of the engine or vehicle. Gearbox is the most important transmission component because it has a direct role in changing wheel torque and speed on drive wheels, changing the direction of movement of the vehicle foward or backward, and stopping the torque and enabling the engine to operate while the vehicle is stopped. The first gearboxes were manual gearboxes and were easy-made and therefore cheap to manufacture, install and repair, and required the driver to choose the desired gear. Further development of vehicles resulted in development of automatic transmissions that did not require the driver to select the gear ratio while driving, but only to select the direction of movement of the vehicle when moving from the stationary position. Such features allowed the driver a simpler and more enjoyable ride, but some of the drawbacks were slower gear shifting, slower vehicle acceleration, and increased fuel consumption. Because of their complexity, automatic gearboxes were more expensive to manufacture and maintain and often had a larger mass than manual gearboxes. With the development of new technologies over the past few years, the disadvantages of automatic transmissions are reduced and their usage is increasing. This study will outline the overall transmission system of road motor vehicles with an emphasis on automatic transmissions and their types and their impact on exploitation characteristics of road motor vehicles.

• Keywords: transmisija vozila; ručni mjenjači; automatski mjenjači
• Keywords (english): vehicle transmission; manual transmission; automatic transmission
• Language: croatian
• URN:NBN: urn:nbn:hr:119:229770
• Study programme: Title: Traffic and Transport; specializations in: Road Traffic and Transport, Railway Traffic and Transport, Water Traffic and Transport, Air Traffic and Transport, Postal Traffic, Information and Communication Traffic, Urban Traffic and Transport; Course: Road Traffic and Transport; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka prometa (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka prometa)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2018-11-28 14:59:17