Lubrication system and shifting system improvements

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Date
2012-06-11Author
May, Morgan
Gryba, Bryce
Najar, Korosh
Galvez, Gerald
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This report presents designs for the lubrication circuit, scavenging prevention system and
recommendations for shifting system upgrades to the 2012 University of Manitoba Formula Student
Design Team. The scavenging prevention system presented in this report should prevent scavenging
assuming that the oil pump is unable to provide oil flow for at least 6 seconds. The proposed design
incorporates an accumulator into the hydraulic circuit by means of rigid hydraulic lines and a one-way
flow valve. When there is flow available from the oil pump, oil is stored in the accumulator at an
elevated pressure. At times when the oil pump is no longer capable of providing sufficient pressure,
the accumulator reacts to maintain flow to the lubrication circuit. Supporting calculations, MATLAB
code for pressure and flow calculations and excel worksheets for determining pressures and sizes of
accumulator are provided with this report.
Design recommendations for the 2011-2012 University of Manitoba formula SAE shifting system are
also presented in this report. The leaking pneumatic shifting system should be repaired by replacing
the current flex lines and a paint-ball gun air regulator, with rigid lines and an appropriately sized air
regulator. Also, recommendations for how to link the high pressure lubrication circuit with the shifting
system are outlined. A full design is not included for linking the lubrication and shifting systems as this
would fall outside the mass budget for this project.