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	Text
Dr. Stuart Birrell, 200 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: To help students understand the principles of internal combustion engines, engine testing and their application in agricultural tractors. To provide students with a fundamental understanding of the concepts of traction and chassis mechanics. 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.

2007-2009 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	14	Introduction			No Lab
	16	Work / Energy / Power	Chap 2,
Jan	21	Holiday			No Lab
	23	Engine Performance
Jan	28	Engine Cycles	Chap 4	HWK 1 Solutions	Engine Performance Tests LabData.xls (Formal Report)
	30	Engine Cycles
Feb	4	Fuels		HWK 2   Solutions	Engine Friction Tests Lab2Data.xls (Formal Report)
	6	Fuels/Combustion	Chap 5
Feb	11	No Class			No Lab
	13	Engine Design	Chap 6
Feb	18	Engine Design			Engine Indicated Pressure Tests (Formal Report)
	20	Exam 1  (Exam 1_2008)
Feb	25	SI/CI Engine	Chap 7		Sec 1. Engine Construction Sec 2. No Lab
	27	CI Engine
Mar	3	Turbocharging/Aftercooling	Chap 8		Sec 1. Engine Construction Sec 2. Engine Construction
	5	Weight Transfer
Mar	10	Tires / Traction			Sec 1. No Lab            Sec 2. Engine Construction
	12	Traction
Mar	17-21	Spring Break
Mar	24	Tractive Performance	Chap 13	HWK 3 Solutions	Team Project Meeting
	26	Chassis Mechanics
Mar	31	Trip		HWK 4 Solutions	Trip to John Deere Waterloo Works
	2	Clutches,/Transmissions IVT	Chap 14
April	7	Transmissions/Differentials	Chap 12		Engine Pressure Lab PressureData.xls
	9	Transmission Homework
April	14	Hydraulics	Chap 11		Team Project Meeting
	16	Hydraulics
April	21	Electronics, CAN	Chap 10		Traction  Test
	23	Final Reports
April	28	Exam 3_2008 TestExam3 example			John Deere 7930 Can Bus Lab (Tentative)
	30	Open
May	1-5	Final Exams  (Test2Exam_example)

Project Requirements: Instructions 

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.