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Suspension Peter Morabito Michael Paliga Brian Ross Drivetrain Kenny Elliot Patrick Mooney Dylan Quinn Frame Dan DAmico Curtis May Greg Schafran.

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Presentation on theme: "Suspension Peter Morabito Michael Paliga Brian Ross Drivetrain Kenny Elliot Patrick Mooney Dylan Quinn Frame Dan DAmico Curtis May Greg Schafran."— Presentation transcript:

1 Suspension Peter Morabito Michael Paliga Brian Ross Drivetrain Kenny Elliot Patrick Mooney Dylan Quinn Frame Dan DAmico Curtis May Greg Schafran

2 To design a vehicle for the SAE Baja Competition

3 14.50 ft lbs of Torque ~10 horsepower Gaged GX-9 CVT specifically designed for SAE Baja 3.85:1 initial ratio 0.9:1 final ratio Double Reduction Gearbox 8:1 Ratio

4 [Veh. wt]*[Sin(incline angle)] = Repelling Weight [650 lbs]*[Sin(40 degrees)] = 418 lbs Rep wt = (tire rad)*(CVT ratio)*(engine tq)*(X min) 418 lbs = (1.0 ft)*(3.85)*(14 lb-ft)*(X min) ----->Xmin= Gear Ratio Calculations Gear Ratio: (8.0/7.7551) = Vehicle Weight: (650 lbs / 600 lbs) = Incline Angle: (40 deg / 37.5 deg) = Torque: (15 lb-ft max / 14 lb-ft avg) = Total FS = (1.0326)(1.0833)(1.0667)(1.0714) ----->Total Safety Factor = Safety Factor Calculations Lewis Bending Stress Barth Velocity Factor Lewis Factor of Safety Barth Velocity Factor of Safety StagePitchTeeth Pitch Angle Dp Face Width Tangential Load (lbf) Lewis Form Factor Stress (psi)stress (psi) AISI 1020 Steel Safety AISI 1020 Steel Safety factor

5 Stage :1 Size: 20/40 teeth Pitch: 12 Face Width: 1.0 in Stage :1 Size: 20/80 teeth Pitch: 12 Face Width: 1.0 in 6.5 inch diameter output gear allows room for differential mounting and selection.

6 This years more advanced design will incorporate a differential Added to increase the vehicles maneuverability Wheels will be able to rotate at different speeds Better in technical events and in and out of tight turns Will be a great help since the vehicle lacks reverse Need to determine shaft size to fit differential Differential What Comes Next? Gearbox housing and bearings FEA analysis Subframe/Mounting

7 Suspension Front Suspension Basic Double A-arm setup Same overall design as previous years car No significant changes, just modifying to fit newly designed frame Rear Suspension Using a rear trailing arm set up similar to the 2012 car Eliminating the dynamic toe aspect, but maintaining the dynamic camber Improving wheel travel and reliability

8 Shock Selection Fox Float Racing Shocks: Adjustable air spring, velocity damping control, and light weight. Reduced Cost - $ per pair versus $859 per pair for Custom Works Shocks. Comparable performance

9 Optimum K Front suspension modeled in Solid Works Front suspension modeled in Optimum K Front suspension has begun testing in Optimum K

10 Frame- Methods SAE standards SAE standards Firewall Firewall Front end Front end Roll cage Roll cage Rear end Rear end

11 The 2012 ODU Mini Baja (55 th place) weighed 479 pounds The 2012 ODU Mini Baja (55 th place) weighed 479 pounds Cornells car (3 rd place) weighed only 306 pounds Cornells car (3 rd place) weighed only 306 pounds Reduce frame size and weight Reduce frame size and weight Eliminate redundant members Eliminate redundant members Frame- Analysis

12 Material-4130 steel tubing Shorter overall length Lighter than previous ODU cars Future: FEA using PATRAN Rollover Rollover Test front/rear/ side impact Test front/rear/ side impact Frame- Results

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