Baja SAE India 2013

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Auto Architects V3 Baja SAE India 2013 Go Green

Transcript of Baja SAE India 2013

Page 1: Baja SAE India 2013

Auto Architects V3

Baja SAE India 2013 Go Green

Page 2: Baja SAE India 2013

» Our team consists of 20 members from different disciplines.

» 1 Industrial Engineer » 13 Mechanical Engineer » 2 Electrical Engineer » 2 Instrumentation Engineer

» Our faculty advisor is Dr. Umashankar

INTRODUCTION

TEAM ALLOCATION

» Captain, Vice Captain, Driver, Co-driver, Spokesperson, Treasurer, Technical Coordinator, Marketing, Purchase, Design, Manufacturing, Web Manager, Validation and Aesthetics.

» Engine » Transmission » Roll Cage » Power

Transmission

» Suspension » Brakes » Steering » Electrical

Transmission

MANAGEMENT TECHNICAL

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SAE BAJA Rulebook (2013) Important Parameters

Objective : To Design, Simulate and Fabricate a rugged and economical ATV

Design Parameters Rulebook 2013 Auto Architects V3

Rear Roll Hoop (RRH) Min 29’’ at 27’’ 34”

RRH angle to vertical Max ±200 100

Height above driver seat Min 41’’ 41.5”

Dist. Of RHO from driver seat Min 12’’ 27.46”

Angle subtended by front bracing member Max 450 440

Maximum width of the vehicle 64’’ 57.31”

Height of SIM above the seat 8-14” 10.5”

Table 1 : Comparison of parameters in SAE BAJA Rulebook 2013 with Auto Architects V3

Other important restrictions

The vehicle should be a Two Wheel Drive. All the four wheels should lock at the same time while braking.

The steel used for the roll cage should have a minimum of 0.18% of Carbon. Safety of the driver is the first priority.

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Target Performance Specifications

Table 2 : Target Performance Specifications with Conditions assumed and Critical values

Other important targets

We also target to reduce our emission level as compared to previous year. Weight of the vehicle including driver weight would be less than 350Kgs.

Enhanced safety of the driver and of the pit crew.

Performance Parameters Conditions assumed Critical Values

Maximum Speed 4th gear Champion Alpha gear box 59.2 kmph

Uphill Climb Total weight 350Kg. and μ=0.5 Up to 50o

Maximum Acceleration 0 to 50 kmph in 5 seconds 2.7 m/s

Minimum Turning Radius At a speed of 8 kmph 2.2 m

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Technical Specifications

Table 3 : Design parameters and Specifications

Important Operational Aspects

Design Parameters Specifications

Weight 350 Kg. (including drivers weight)

Length Width Height 90” 62” 66”

Wheel Base 78’’

Wheel Track 53’’

Ground Clearance 11’’

Maximum Wheel Travel Front : 10” Rear : 6”

Tire Size Front : 22” X 7” Rear : 23” X 10”

Centre of Gravity

130cms horizontal from middle of lower member of RRH and 60 cms above the vehicle base

Rear Engine

Rear Wheel Drive

Two Wheel Steering

Rack and Pinion Steering

Front Disc Brakes

Rear Drum Brakes

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Mathematical Calculations

Steering Geometry

Weight transfer during incline

Turning Circle Radius

Outer Front Wheel 4.62 m

Inner Front Wheel 3.10 m

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Suspension and Steering System

Suspension System

Steering System

Front Suspension : Double A shaped parallel wishbone with minimum un-sprung to sprung mass ratio. Rear Suspension : Trailing arm and Inclined Strut. Maximum Wheel Travel : 8”

Functions of Suspension Road Isolation Road Holding

Cornering

Centrally mounted rack and pinion steering system with a larger steering wheel to be used. The steering

column will be linked with universal joints.

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Drafts of the AA-V3 ATV

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Perspectives of the AA-V3 ATV

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Roll cage Finite Element Analysis

Condition : Rear face is constrained and a load of 5000N is applied at 2 nodes of front face.

Maximum Stress : 103.59 Mpa Maximum Displacement : 0.76 mm

FRONT IMPACT

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Roll cage Finite Element Analysis

Condition : LFAS is constrained and a load of 5000N is applied at the at four points of right face.

Maximum Stress : 0.0019061MPa Maximum Displacement : 0.66mm

OVERHEAD IMPACT

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Stress analysis using Strain Gauge Model and Strain Gauge Details

Material Mild Steel

Diameter 6 mm

Welding Gas

Scaling ratio 1 : 4.23

Type Foil

Make Vishay , USA

Gauge Resistance 350 Ω

Gauge factor 2.17

Bonding element Cyano acrylate

Material Constantan

Bridge Quarter

Load Vo STRAIN

10Kg 0.05 0.0205

20Kg 0.12 0.0206

30Kg 0.16 0.0207

40Kg 0.27 0.0213 Ε = ( 4 X E0/Ei (Initial voltage) X (Gain Factor))

FORMULA USED

Ei = 5 volts Gain Factor = 2.17

Maximum Strain = 0.165x 10^-3 after applying 50kg of load.

Maximum stress from FEA results = 0.27x10^-3 N/m2

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Ergonomic Analysis of Roll cage

Ergonomic analysis has been done keeping safety, comfort, ease of use, performance and aesthetics in mind. An exact replica of roll cage was made

from 1” PVC pipes cut at required size and held together by M-SEAL.

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Innovations for a green ATV

Catalytic Converter Electrostatic Precipitator

It is a pollution control device which converts harmful NOx & CO into N2 &

CO2 respectively. Consists of ceramic structures coated with

platinum, rhodium and/or palladium. Reduction and oxidation chambers are

present separately.

Installed towards the rear end of the exhaust. It has two electrodes:

* Aluminum coated on inner surface * Copper wires made along the length of tube.

Input : 8KV to 15KV High potential difference is

set up between the electrodes, which attracts CO2 and CO gas molecules.

Distance between electrodes : 5 to 10 mm.

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Project Plan for 4000 ATV’s

We have features for every step of the way

CONCEPTUAL

PHASE

DEVELOPMENT

PHASE

IMPLEMENTATION PHASE

•Team formation • Work distribution

• Identification of resources • Progress review through

group meetings

•Design: Modeling and Analysis • Checking the feasibility of the

model using strain gauges • Comparing both Analysis and

Experimental results

•Sponsorship • Locating sources for

material and other parts • Purchasing material

and required parts • Assembly

• Validation and testing

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Any Queries?

THANK YOU