%0 Conference Paper %1 Saric2011a %A Repčić, Nedžad %A Šarić, Isad %A Avdić, Vahid %B Proceedings of the 15th International Research/Expert Conference „Trends in the Development of Machinery and Associated Technology” TMT 2011 %C Prague, Czech Republic %D 2011 %K formula_1 gearbox ratio_drop rpm torque tractive_effort_curves %P 973--76 %T Tractive Effort Curves in Gearbox Analyse %U https://www.researchgate.net/publication/235618460_Tractive_Effort_Curves_in_Gearbox_Analyse/file/32bfe512138d9c09e6.pdf %X A common feature of all engines with internal combustion is the need for a gearbox. This constructive requirement is justified with the practical fact that, if the torque and power characteristics of an engine would be geared directly to the working bodies of a consumer machine (such as road wheels) it could not ensure enough torque throughout the vehicles operational speed range. According to the operational task that the vehicle should manage, several solutions are used. Automatic (planetary) gearboxes and CVTs (Continuously Variable Transmission) allow gear ratio changes without power interruption. In other cases such as race car technology, multiple ratio gearboxes are caused by rules and regulations. In order to optimise gearbox performance, a wide range of analytical methods are used. One of the most frequently used, is the traditional straight line plot of road speed against engine rpm (rounds per minute) as a method of choosing ratios. Unlike this method, tractive effort curves include much more information and so they can publish how well ratios are suited to the engine`s characteristics as well as the fundamental track parameters that driven their choice. This paper should state out the benefits of tractive effort curves in gearbox analyse. In order to maintain this, an instance from the Formula 1 was taken. Based on onboard video records of different tracks (in this example the tracks in Monaco and Monza were chosen), authors could approximately determine points of gear change and top speeds achieved within a certain ratio. These information allow to set a group of tractive effort curves (as well as several road speed – engine rpm diagrams). A huge amount of data, related not just to the gearbox, can be obtain when comparing results of these two methods and using them together.

@inproceedings{Saric2011a, abstract = {A common feature of all engines with internal combustion is the need for a gearbox. This constructive requirement is justified with the practical fact that, if the torque and power characteristics of an engine would be geared directly to the working bodies of a consumer machine (such as road wheels) it could not ensure enough torque throughout the vehicles operational speed range. According to the operational task that the vehicle should manage, several solutions are used. Automatic (planetary) gearboxes and CVTs (Continuously Variable Transmission) allow gear ratio changes without power interruption. In other cases such as race car technology, multiple ratio gearboxes are caused by rules and regulations. In order to optimise gearbox performance, a wide range of analytical methods are used. One of the most frequently used, is the traditional straight line plot of road speed against engine rpm (rounds per minute) as a method of choosing ratios. Unlike this method, tractive effort curves include much more information and so they can publish how well ratios are suited to the engine`s characteristics as well as the fundamental track parameters that driven their choice. This paper should state out the benefits of tractive effort curves in gearbox analyse. In order to maintain this, an instance from the Formula 1 was taken. Based on onboard video records of different tracks (in this example the tracks in Monaco and Monza were chosen), authors could approximately determine points of gear change and top speeds achieved within a certain ratio. These information allow to set a group of tractive effort curves (as well as several road speed – engine rpm diagrams). A huge amount of data, related not just to the gearbox, can be obtain when comparing results of these two methods and using them together.}, added-at = {2013-03-07T23:16:22.000+0100}, address = {Prague, Czech Republic}, author = {Repčić, Nedžad and Šarić, Isad and Avdić, Vahid}, biburl = {https://www.bibsonomy.org/bibtex/27e464245ef3b8a0d6970eb1cdc0ac4c8/saricisad}, booktitle = {Proceedings of the 15th International Research/Expert Conference „Trends in the Development of Machinery and Associated Technology” TMT 2011}, interhash = {2a5464d164a14a4125a1f22681ee226a}, intrahash = {7e464245ef3b8a0d6970eb1cdc0ac4c8}, keywords = {formula_1 gearbox ratio_drop rpm torque tractive_effort_curves}, pages = {973--76}, timestamp = {2013-07-20T14:21:57.000+0200}, title = {{Tractive Effort Curves in Gearbox Analyse}}, url = {https://www.researchgate.net/publication/235618460_Tractive_Effort_Curves_in_Gearbox_Analyse/file/32bfe512138d9c09e6.pdf}, year = 2011 }