Utjecaj mjenjača na eksploatacijske značajke cestovnih vozila

undergraduate thesis

• Title (english): Impact Of Transmission On Road Vehicles Exploatation Characteristic
• Author: Dalibor Čančar
• 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: 2020-09-15, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Traffic and Transport Technology; Road and Rail Transport

Abstract

Jedan od najvažnijih i najsloženijih mehaničkih sustava na cestovnim motornim vozilima je transmisija. Zadaća transmisije je transformacija i prijenos snage, okretnog momenta i brzine vrtnje s motora na pogonske kotače s ciljem dobivanja što veće efikasnosti motora. Mjenjači imaju najvažniju ulogu u transmisiji jer izravno vrše promjenu okretnog momenta i brzine na pogonskim kotačima. Također imaju ulogu u promjeni smjera kretanja vozila i prekidu prijenosa okretnog momenta, te omogućavaju rad motora dok se vozilo ne kreće. Prvi mjenjači su bili ručni mjenjači, te su bili vrlo jednostavno izvedeni pa samim time jeftini za izradu, ugradnju i popravak. Takvi mjenjači zahtijevali su da vozač sam odabere željeni stupanj prijenosa. Razvojem vozila pojavljuju se automatski mjenjači koji nisu zahtijevali od vozača da bira stupanj prijenosa tijekom vožnje. Kod takvih mjenjača bilo je bitno izabrati željeni smjer kretanja prilikom kretanja iz stacionarnog položaja. Takve značajke omogućavale su vozaču ugodniju i jednostavniju vožnju. Nedostaci automatskih mjenjača su bili spora promjena stupnja prijenosa, slabije ubrzanje vozila te povećana potrošnja goriva. Automatski mjenjači zbog svoje kompleksnosti su bili skuplji za proizvodnju i održavanje. Razvojem novih tehnologija smanjuju se nedostaci automatskih mjenjača, te njihova upotreba je sve veća. U ovom radu će biti prikazan cjelokupan sustav transmisije cestovnih vozila. Naglasak će biti na ručne, poluautomatske i automatske mjenjače, te njihov utjecaj na eksploatacijske značajke cestovnih vozila.

Abstract (english)

One of the most important and complex mechanical systems on road motor vehicles is the transmission. The task of the transmission is the transformation and transmission of power, torque and speed of rotation with the engine to the drive wheels in order to obtain the highest possible engine efficiency. Gearboxes play the most important role in the transmission as they directly change the torque and speed on the drive wheels. They also play a role in changing the direction of movement of the vehicle and interrupting the transmission of torque that allow the engine to run while the vehicle is not moving. The first gearboxes were manual gearboxes and were very simple and cheap to make, install and repair. Such transmissions required the driver to select the desired gear. With the development of the vehicle, automatic transmissions emerged that did not require the driver to select a gear while driving. With such gearboxes, it was important to choose the desired direction of movement when moving from a stationary position. Such features allow the passenger comfort and ease of driving. The disadvantages of automatic transmissions were slow gear changes, lower vehicle acceleration and increased fuel consumption. Automatic transmissions due to their complexity were assembled for production and maintenance. The development of new technologies reduces the shortcomings of automatic transmissions, the use of which is increasing. In this paper, the entire transmission system of road vehicles will be presented. The emphasis will be on manual, semi-automatic and automatic transmissions their impact on the performance characteristics of road vehicles.

• Keywords: transmisija vozila; mjenjači; ručni mjenjači; automatski mjenjači
• Keywords (english): vehicle transmission; gearboxes; manual transmissions; automatic transmissions
• Language: croatian
• URN:NBN: urn:nbn:hr:119:354403
• 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: 2020-11-06 11:31:29