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

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 3 rd 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.

Customers Impoverished people of developing countries. EMT personnel

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

Customer Requirements Transmission Forward & Reverse Top speed <20 mph on grass Payload 1200 lbs including driver Steering System Turn Diameter <20 ft + 50° from centerline

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

Customer Requirements Chassis Small truck frame Ground clearance >10.5 inches except at differential Skid plates <11 ft or <12 ft if using motorcycle seating arrangement

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

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 < 6 man hours to assemble front kit and assemble to rear unit. Does not include cargo bed.

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 <160 lbs

Project Boundaries & Objectives Boundaries Cost Size Performance/durability Objective Low cost transportation / ambulance

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

Competitive Benchmarks Fall 2003 IUPUI BUV 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

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

Functional Decomposition

Concept 1

Concept 2

Concept 3

Failure Modes

Critical Parameters Steering Angle Suspension Travel Weight Capacity Clearance

Concept Evaluation Absolute Comparison Go/No go All a go Relative Comparison Decision Matrix

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

Project Plan

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)