AE 342: Lectures on MW 11-11:50 AM, Room 115 Davidson Hall

Labs Section A: M 12:10-3:00 PM, Room 147 Davidson Hall

Labs Section B: M 3:10-6:00 PM, Room 147 Davidson Hall

Agricultural Tractor Power.

Instructor

TextBook

Dr. Stuart Birrell, 208 Davidson Hall

Phone: 294-2874, sbirrell@iastate.edu

Office hours:

Walk in, except 10-12 M,W; 12-6M, Other times by appointment

Required Text:

Off Road Vehicle Engineering Principles, Goering, C.E., M.L. Stone, D.W. Smith, and P.K. Turnquist. St. Joseph, Mich.: ASAE.(www.asabe.org)

Class Website :http://www.abe.iastate.edu/studentinfo/classwebs.asp

Purpose:

  1. To help students understand the principles of internal combustion engines, engine testing and their application in agricultural tractors.
  2. To provide students with a fundamental understanding of the concepts of traction and chassis mechanics.
  3. Improve student's communication/teamwork skills. Provide exposure to problems that require judgment decisions and justification of those decisions, even in the case of incomplete information.

2003-2005 Catalog Description

Expected Student Learning Outcomes

A E 342. Agricultural Tractor Power. (2-3) Cr. 3. S. Prereq: M E 330. Thermodynamic principles and construction of tractor engines. Fuels, combustion, and lubrication. Kinematics and dynamics of tractor power applications; drawbar, power take-off and traction mechanisms. Nonmajor graduate credit.

Upon successfully completing this course, you should:

  • Understand the terminology and basic design principles governing the performance of an engine
  • Exhibit a fundamental understanding of the concepts of traction and chassis mechanics including the interaction between weight transfer, slip and traction, based on the Wismer-Luth and Brixius equations.
  • Understand planar chassis mechanics and limitations of tractor performance based on traction, stability and/or engine torque.
  • Understand the power flows through a tractor from the engine, through the power train and development of drawbar power.
  • Complete the design/modeling of a "virtual tractor" with teams responsible for individual subsystems, and co-ordination between teams to ensure completion of the overall design project.

　

Course Outline (tentative)

Date

Topic

Reading

Problems

Laboratory

Jan

12

Introduction

No Lab

14

Work / Energy / Power

Chap 2,

HmWrk_1

Jan

19

Holiday

No Lab

21

Engine Performance

Jan

26

Engine Cycles

Chap 4

Engine Performance Tests   Section1_Data.xls     Section2_Data.xls

(Formal Report)

28

Engine Cycles

Feb

2

Fuels

Engine Friction Tests  Section1 & Section2 Data.xls

(Formal Report)

4

Fuels/Combustion

Chap 5

Feb

9

Exam 1

Engine Indicated Pressure Tests (Formal Report)

11

Engine Design

Chap 6

Feb

16

Engine Design

Sec 1. Engine Construction Sec 2. No Lab

18

Engine Design

Feb

23

SI/CI Engine

Chap 7

Sec 1. Engine Construction

Sec 2. Engine Construction

25

CI Engine

Mar

1

Project

Chap 8

Sec 1. No Lab

Sec 2. Engine Construction

3

CI Engine

Mar

9

Turbocharging/Aftercooling

 

Trip to John Deere Waterloo Works Traction Tests

11

Weigh Transfer

Mar

16-20

Spring Break

Mar

23

Tires / Traction

Chap 13

HWK2   Solutions

Team Project Meeting

25

Traction

Mar

30

Exam 2 (ExampleTest)

Team Project Meeting

1

Chassis Mechanics

Chap 14

April

6

Clutches,/Transmissions

Chap 12

Team Project Meeting

8

Transmissions/Differentials

Hwk3  Solutions

April

12

Hydraulics

Chap 11

Hwk4 Solutions

Traction Center of Gravity, Stability Tests     Section1&2_Data.xls

14

Hydraulics

April

20

Electronics, CAN

Chap 10

Team Project Meeting

22

Final Reports

April

27

Exam (ExampleTest)   Exam3_Solutions

Team Project Meeting

329

Open

May

1-5

Final Exams


Class Project:

Project Statement

Course Grading:

Course Component

Percent of Final Grade

Problem Sets/Lab Reports

15%

Project

20%

Exam1, Exam 2, Exam 3

45% (each worth 15%)

Final

20%

　

　

Grading System:

Course Policies:

Score Min. grade of:

≥ 90 A-

≥ 80 B-

≥ 70 C-

≥ 60 D-

I may shift these scores downward depending on the distribution of the scores.

Homework and Lab Assignments: You will be required to turn in a lab report, or engineering letter for each set of labs as instructed. Most reports will be due the week following the actual lab.

  • The reports will be formal reports (unless otherwise instructed). The reports must be well organized, neat and orderly. The reports, tables and figures (possible exception of sample calculations and equations) should be computer generated. The original data sheets may be included in appendices without change.
  • Tabulated data: Record both observed and calculated results along with associated units. Manipulate the columns, spacing, etc. so it is easy to read and in an organized format.
  • Sample Calculations: Show one sample of each different calculation and or equation development.

Exams: You are expected to take exams with the class. Any exceptions need to be cleared with me before the scheduled time that the exam is given.

Attendance:

Attendance to all labs are mandatory for the duration of the lab. Excused absences must be cleared with instructor in advance, except in the case of critical family/health emergencies. If you are not there, you will receive a zero unless you have an excused absence.

Disability Accommodation Statement:

If you have a documented disability and anticipate needing accommodations in this course, please make arrangements to meet with us soon. Please request that a Disability Resources staff send a SAAR form verifying your disability and specifying the accommodation you will need.