SAE Baja Design CONCEPT GENERATION AND SELECTION Abdulrahman - - PowerPoint PPT Presentation

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SAE Baja Design CONCEPT GENERATION AND SELECTION Abdulrahman - - PowerPoint PPT Presentation

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SAE Baja Design CONCEPT GENERATION AND SELECTION Abdulrahman Almuflih, Caizhi Ming, Andrew Perryman, Ruoheng Pan, Zan Zhu, Oct 28, 2013 Overview 1. Introduction 2. Concepts generation a. Continuously Variable Transmission b. Automatic

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SLIDE 1

SAE Baja Design

CONCEPT GENERATION AND SELECTION

Abdulrahman Almuflih, Caizhi Ming, Andrew Perryman, Ruoheng Pan, Zan Zhu, Oct 28, 2013

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SLIDE 2

Overview

  • 1. Introduction
  • 2. Concepts generation
  • a. Continuously Variable Transmission
  • b. Automatic transmission
  • c. Manual transmission
  • 3. Concept selection
  • 4. Project plan
  • 5. Conclusion
  • 6. Reference

1 Andrew Perryman

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SLIDE 3
  • 1. Introduction
  • This is the Drivetrain Design for the SAE Baja Competition Team
  • The purpose of our team is to define and design the best

possible drivetrain for the specific use of a single seater off road buggy.

  • Our most pressing issue is the identification of the best possible
  • transmission. (CVT, Automatic or Manual)
  • As we progress through our presentation we will clarify what our

best solution is and how we came to this conclusion.

2 Andrew Perryman

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SLIDE 4
  • 2. Concept Generation
  • a. Continuously Variable Transmission
  • b. Automatic Transmission
  • c. Manual Transmission

3 Andrew Perryman

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SLIDE 5

Continuously Variable Transmission

Introduction:

  • One kind of automatic transmission.
  • Transfer the range of power and torque from engine continuously.

4 Caizhi Ming

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SLIDE 6

Different type of CVTs

  • Friction drive
  • Pulley drive
  • Toroidal drive

5 Caizhi Ming

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SLIDE 7

Friction Drive

Friction Drive CVT Basic Concept

Source: https://d2t1xqejof9utc.cloudfront.net/files/19153/eti_19_CVTransmission.pdf?1363999370

6 Caizhi Ming

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SLIDE 8

Pulley Drive

Pulley Drive CVT Basic Concept

Source: https://d2t1xqejof9utc.cloudfront.net/files/19153/eti_19_CVTransmission.pdf?1363999370\

7 Caizhi Ming

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SLIDE 9

Toroidal Drive

Toroidal CVT Basic Concept

Source: https://d2t1xqejof9utc.cloudfront.net/files/19153/eti_19_CVTransmission.pdf?1363999370

8 Caizhi Ming

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SLIDE 10

Advantages

  • Do not need to shift gears
  • Transfer the power continually
  • Good fuel efficiency
  • Have a wide range of gear ratio

9 Caizhi Ming

Disadvantages

  • The system cannot afford

too much torque.

  • Do not have a reverse.
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SLIDE 11

Automatic Transmission

Introduction:

  • One type of motor vehicle transmission.
  • Can automatically change gear ratios as the vehicle cycles from

low rpms to high rpms.

10 Zan Zhu

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SLIDE 12

Planetary Gear System

Planetary Gear System

Source: https://www.carparts.com/transmission.htm

11 Zan Zhu

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SLIDE 13

Advantages

  • Good performance in rough road.
  • Easy to drive.
  • Low failure rate.

12 Zan Zhu

Disadvantages

  • Lower fuel efficiency.
  • Higher price.
  • Higher maintenance cost
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SLIDE 14

Manual Transmission

Introduction:

  • One type of vehicle transmission.
  • Switch between the different gear ratios manually.

13 Abdulrahman Almuflih

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SLIDE 15

Manual Transmission

source: http://www.howstuffworks.com/transmission4.htm

Manual Transmission Basic Concept 14 Abdulrahman Almuflih

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SLIDE 16

Reverse in Manual Transmission

Source: www.howstuffworks.com/transmission4.htm

Idler Gear 15 Abdulrahman Almuflih

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SLIDE 17

Advantages

  • The driver has the ability to

switch gears for higher rpm which helps in hill climbing.

  • Allow for a better

acceleration as the driver can switch gear to maximize that.

16 Abdulrahman Almuflih

  • Low drivability.
  • Low efficient comparing

with CVT transmission.

Disadvantages

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SLIDE 18
  • 3. Concept Selection

Decision matrix

Concepts CVT AT MT WEIGHT Durability 1 2 3 10% Maintenance 2 1 3 5% cost 1 2 3 15% Reversibility 2 3 1 10% Drivability 3 2 1 25% Acceleration 3 1 2 15% Energy Efficiency 2 1 3 10% Weight 3 2 1 10% Weighted Total 2.25 1.8 1.95 100%

17 Ruoheng Pan

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SLIDE 19
  • 4. Project Plan

Gantt chart 18 Ruoheng Pan

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SLIDE 20
  • 5. Conclusion
  • Through the Decision Matrix presented on slide 20, our team

concluded that the CVT would be the best possible solution.

  • This confirmed our initial expectations from the beginning of the

semester.

  • The Baja team as a whole wanted to use a CVT because most

high ranking teams in prior competitions used a this system.

  • Though the system cannot handle overly barring amounts of

torque, the Briggs and Stratton engine will fit this constraint perfectly.

19 Andrew Perryman

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SLIDE 21
  • 6. References
  • 1. Continuously variable transmission(CVT)

https://d2t1xqejof9utc.cloudfront.net/files/19153/eti_19_CVTransm ission.pdf?1363999370

  • 2. CVT Transmission

http://www.insightcentral.net/encyclopedia/encvt.html

  • 3. How Manual Transmissions Work

http://www.howstuffworks.com/transmission4.htm

  • 4. A Short Course on Automatic Transmissions

http://www.carparts.com/transmission.htm

20 Andrew Perryman

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SLIDE 22

Questions?