Suspension development for a short circuit racing car

Nawratzki, Guy (2010) Suspension development for a short circuit racing car. [USQ Project]


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[Abstract]: This report investigates the suspension parameters required to alter a modified mass produced car for use in the short circuit racing environment. The cornering force and handling characteristics of the car are to be altered to result in faster cornering speeds and resultantly reduce lap times.

The required research was undertaken and the necessary modifications were evaluated. The roll centre locations were found to have the largest effect on the cars weight transfer characteristics and balance, and hence the investigation into their location was undertaken in the interest of increasing their optimization. The fitment of front roll centre adjusters was analysed and the positive results justified their fitment to the front suspension. A
Watts Linkage was designed and fitted to the rear suspension and the modification and adjustability of the rear roll centre was the result. The roll centres were effectively raised in the front and lowered in the rear to alter the weight transfer and jacking forces.

The race car was physically tested both before and after the modifications were completed to ensure that a fair ground for comparison was available. The differences in tyre
temperatures, cornering g forces and the driver’s evaluation of the modifications have resulted in positive outcomes for the cornering potential and handling parameters. The new roll centre locations have resulted in a car that is more neutral in its handling characteristics.

The modified roll centre locations have also introduced a new situation for the suspension development and further testing and suspension modification are recommended.
Recommendations for supplementary investigations are included in the interest of further increasing the effectiveness of the performed modifications.

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Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Faculty/School / Institute/Centre: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering (Up to 30 Jun 2013)
Supervisors: Snook, Chris
Date Deposited: 22 Mar 2011 01:38
Last Modified: 03 Jul 2013 00:34
Uncontrolled Keywords: automobiles; vehicle; suspension; race car; vehicle roll centres
Fields of Research (2008): 09 Engineering > 0902 Automotive Engineering > 090203 Automotive Mechatronics
09 Engineering > 0913 Mechanical Engineering > 091399 Mechanical Engineering not elsewhere classified
Fields of Research (2020): 40 ENGINEERING > 4002 Automotive engineering > 400203 Automotive mechatronics and autonomous systems
40 ENGINEERING > 4017 Mechanical engineering > 401799 Mechanical engineering not elsewhere classified

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