Basic Utility Vehicle BUV

1
Basic Utility Vehicle (BUV)

• ME 462 Capstone Design Presentation
• Department of Mechanical Engineering, IUPUI
• December 14, 2005
• Presented by
• Tom Peters
• Kris Miller
• David Langenderfer

2
Design Introduction

• Design a 3 wheeled vehicle made from a small
  truck rear end and frame.
• Design a rear ambulance unit to be attached to
  the chassis.
• Used in 3rd world countries and can be
  manufactured one per day.
• Main focus is cost with emphasis on the drive
  train, ease of assembly, durability, and
  serviceability.

3
Customers

• Impoverished people of developing countries.
• EMT personnel

4
Customer Requirements

• Cost
• 1350 for pre-welded kit
• Does not include assembly, freight, and duties.
• 300 Ambulance cost

5
Customer Requirements

• Transmission
• Forward Reverse
• Top speed lt20 mph on grass
• Payload
• 1200 lbs including driver
• Steering System
• Turn Diameter lt20 ft
• 50 from centerline

6
Customer Requirements

• Seating
• Driver seat on centerline
• If passenger seat is included it must be on
  centerline.
• Power-plant
• 8.5-10 HP internal combustion engine
• Throttle mounted on steering mechanism
• Brake System
• Foot activated truck brakes
• Parking brake
• Independent left and right

7
Customer Requirements

• Chassis
• Small truck frame
• Ground clearance gt10.5 inches except at
  differential
• Skid plates
• lt11 ft or lt12 ft if using motorcycle seating
  arrangement

8
Customer Requirements

• Suspension
• Front Rear
• Front has a min. of 3 inches of travel
• Rear uses truck suspension
• Auxiliary Systems
• V-Belt Power Take Off (PTO)
• V-Belt Driven Water-pump

9
Customer Requirements

• Electrical System
• 12 V DC
• Safety Equipment
• Standard safety equipment
• Example roll protection, horn, lights, seat
  belts, etc
• Size
• Minimize crate size for front end
• Assembly Time
• lt 6 man hours to assemble front kit and assemble
  to rear unit. Does not include cargo bed.

10
Customer Requirements

• Ambulance
• Passenger Capacity
• 3 recumbent patients or 2 patients and 1
  attendant
• Equipment
• IV hooks, stretchers, attendant seat,
  bench/storage, sun rain protection, lights,
  work table, shelf, back-gate and fender
• Storage
• Cold storage, plastic bin storage, in-floor
  storage, outside storage, fuel and water storage.
• Electrical System
• 12V DC
• Miscellaneous
• Impermeable Surfaces resistant to environment
• 2 sq ft Clean surface area
• Size 6x4 ft
• Weight lt160 lbs

11
Project Boundaries Objectives

• Boundaries
• Cost
• Size
• Performance/durability
• Objective
• Low cost transportation / ambulance

12
Design

• Design Specification Development
• Weighting of Customer Requirements
• Engineering Requirements
• Engineering targets

13
Competitive Benchmarks

• Fall 2003 IUPUI BUV
• John Deere Gator

14
John Deere Gator

• Better
• Sales
• Stopping Ability
• Same
• Top speed, horse power, parking brake
• Worse
• Cost
• Payload
• Ground clearance
• No ambulance capability
• No PTO or water-pump

15
Fall 2003 IUPUI BUV

• Better
• Stopping Ability
• Cost
• Overall weight
• Center of gravity
• Same
• Top speed, horse power, parking brake, turning
  radius
• Worse
• Payload
• Ground clearance
• No ambulance capability
• No PTO or water-pump
• Various optional equipment

16
Functional Decomposition
17
Concept 1
18
Concept 2
19
Concept 3
20
Failure Modes
21
Critical Parameters

• Steering Angle
• Suspension Travel
• Weight Capacity
• Clearance

22
Concept Evaluation

• Absolute Comparison
• Go/No go
• All a go
• Relative Comparison
• Decision Matrix

23
Decision Matrix
24
Conclusion

• Concept 3
• Best Overall Concept
• Durable
• Low Cost
• Easy to Manufacture
• Reasonable in Size

25
Project Plan
26
Schedule

• Task 1 Generate Engineering Specifications (9/1
  9/9)
• Task 2 Design concepts of vehicle components
  (9/9 9/23)
• Task 3 Concept Evaluation (9/23 9/30)
• Task 4 Proposal Due Date (10/1 10/10)
• Task 5 Solid Model of Prototype based on best
  concept
• (10/10 11/10)
• Task 6 Evaluate prototype and shake down the
  prototype (11/10 11/25)
• Task 7 Complete final report, presentation and
  poster
• (11/25- 12/7)
• Task 8 Present the final design (12/12)