Instructor's Guide
Total Page:16
File Type:pdf, Size:1020Kb
Instructor’s Guide Powertrain Technology and Service: Automatic Transmission Technology Introduction Driving a car with an automatic transmission may be relatively simple, but the machinery isn’t! Technicians-in-training need a clear and thorough visual guide. This video provides an in-depth technological grounding that will enable students to troubleshoot and repair systems which make up today’s automatic transmissions. Topics include transmission case construction; transmission hydraulics; electronic components, in particular the onboard computer or electronic control module (ECM) and how it sends signals to solenoids in the transmission valve body; the torque converter and its constituent parts; the holding devices that engage the different gearsets, including friction discs, bands, and one-way clutches; and the planetary gearsets, including sun, planet, carrier, and ring gears, as well as the parking pawl used to lock the transmission output shaft. A detailed section on various kinds of hybrid automatic transmission is also presented. Learning Objectives After viewing this video, the student will be able to: • Explain the basic operation of an automatic transmission. • Define the term “planetary gearset.” • Comprehend the basics of hydraulics. • Describe the function of an automatic transmission oil pump. • Explain the primary function of an automatic transmission “valve body.” • Define the term “shift solenoid.” Copyright © 2012 Films Media Group® • www.shopware-usa.com • 1-800-322-8755 43860 1 Automatic Transmission Technology Instructor’s Guide • Describe the function of automatic transmission “shift” and “manual” spool valves. • Explain the basic operation of an automatic transmission clutch pack. • Understand the basic operation of an automatic transmission “torque converter.” • Explain the basic action of an electronically controlled automatic transmission. To the Instructor This video is designed to be a valuable supplement to your curriculum. Since young people are highly acclimated to television or video, it is a natural way to help present important aspects of your subject matter. Feel free to print the conents of this user guide for classroom distribution. You can then hand out the printed quizes and other information to your students as desired. Most educators agree that it is best to use as many instructional methods as possible. Utilize quality textbooks, workbooks, videos, lectures, demonstrations, overheads, and other methods to present the technical information. This will hold your student’s interest and help them to understand the large amount of information required to succeed in today’s complex world of auto repair. This video is organized into major sections or topics. Each section covers one major segment of the subject. Graphic breaks are given between each section so that you can stop the video for class discussions, demonstrations, or Q & A. This allows you to either watch just a portion of the program each day or to present the complete video, depending on your curriculum requirements. The video is designed to simplify the complex. Concise wording and carefully selected graphics are used to provide maximum learning in minimum time. Computer animation is used to explain difficult-to-comprehend principles or techniques. These images show how parts work, how they fit together, or how they vary in design. Use your own judgment to evaluate the definitions, short answer questions and discussion topics. Most instructors use these as open-book activities. Educational Standards This program content correlates with the present ASE (NATEF) auto repair standards, but goes beyond them to help the student repair conventional and high-voltage hybrid vehicles. New infor- mation on hybrid and full electric, high-voltage drivelines has been included in this series of videos. For more information on educational standards for this series, please visit http://ffh.films.com/ id/25198. Copyright © 2012 Films Media Group® • www.shopware-usa.com • 1-800-322-8755 43860 2 Automatic Transmission Technology Instructor’s Guide ASE ASE or Automotive Service Excellence, is a nonprofit national institute that works to improve the quality of vehicle repair and service by testing and certifying automotive professionals. Today, more than 350,000 professionals hold ASE certifications, and work in every part of the automotive service industry. Our video producers work closely with ASE to communicate the types of subjects that must be included in our content. The information in this video and the intire Powertrain Technology and Service series will help you pass the following ASE Certification Tests: A2 – Auto: Automatic Transmissions/Transaxles 25 A3 – Auto: Manual Drive Train and Axles 20 For more information on ASE Certification, please visit www.ase.com. NATEF The information in this video correlates with NATEF standards for auto repair. NATEF was founded as an independent, nonprofit organization with a single mission: to evaluate technician training programs against standards developed by the automotive industry and recommend qualifying programs for NATEF accreditation. Video Discussion Topics Here are a few topics that might be used for a class discussion: 1. Describe the basic operation of an automatic transmission. 2. Explain the meaning of the word “hydraulics.” 3. Describe the construction of an automatic transmission housing. 4. Why is a “pressure regulator valve” used on an automatic transmission? 5. Where are solenoid valves usually located on an automatic transmission? 6. Do all automatic transmissions operate in more or less the same manner? 7. How does an automatic transmission torque converter operate? 8. How have the advances in the field of electronics affected automatic transmission efficiency and performance? Copyright © 2012 Films Media Group® • www.shopware-usa.com • 1-800-322-8755 43860 3 Automatic Transmission Technology Instructor’s Guide Technical Terms Write definitions for the following terms. Use your textbook or review the video as needed. automatic transmission transmission case torque converter automatic transmission oil pump automatic transmission clutch assemblies automatic transmission bands planetary gearsets servo piston valve body rear-wheel drive automatic transmission front-drive transaxle automatic transmission bell housing automatic transmission oil pan automatic transmission spool valve oil pump pressure regulator valve shift points automatic transmission manual valve line pressure automatic transmission shift valves sun gear clutch pack planet pinion gears Copyright © 2012 Films Media Group® • www.shopware-usa.com • 1-800-322-8755 43860 4 Automatic Transmission Technology Instructor’s Guide planet pinion carrier automatic transmission ring gear parking pawl parking gear drive chain onboard computer transmission sensors electronically controlled automatic transmission torque converter lockup valve body solenoids torque converter one-way clutch Copyright © 2012 Films Media Group® • www.shopware-usa.com • 1-800-322-8755 43860 5 Automatic Transmission Technology Instructor’s Guide Short Answer Have students briefly answer the following questions in their own words: 1. Does an automatic transmission perform the same functions as a standard, manual transmission? 2. Where is the “manual valve” usually located on an automatic transmission? 3. Where is the “valve body” normally located on an automatic transmission? 4. Describe the construction of an automatic transmission “torque converter.” 5. Name two possible locations of an automatic transmission oil pump. 6. Name three types of “holding devices” used in automatic transmissions. 7. Explain the term “hydraulic servo.” 8. How does a clutch pack work in an automatic transmission? 9. What does a basic “planetary gearset” consist of? 10. Where is an automatic transmission’s “parking gear” usually located? Copyright © 2012 Films Media Group® • www.shopware-usa.com • 1-800-322-8755 43860 6 Automatic Transmission Technology Instructor’s Guide Video Quiz Choose the most correct answer after reading the statement: 1. An automatic transmission system normally senses engine speed, engine load, and other variables to determine gear shift ________. a. levers b. points c. length d. backlash 2. To understand the operation of an automatic transmission or transaxle, you must first understand the basics of ______. a. chemistry b. algebra c. hydraulics d. ecology 3. Which of the following components is the “heart” of an automatic transmission and hydraulic circuit? a. Manual valve b. Solenoid c. Torque converter d. Oil pump 4. The main function of an automatic transmission valve body is to control the flow of _______ through the transmission circuits. a. fluid b. electrons c. grease d. torque 5. When you move the shift selector in the passenger compartment, you are actually moving the automatic transmission’s _______ valve. a. manifold b. manual c. pinion d. cluster Copyright © 2012 Films Media Group® • www.shopware-usa.com • 1-800-322-8755 43860 7 Automatic Transmission Technology Instructor’s Guide 6. This part changes fluid flow to control power flow through a modern automatic transmission: a. line pressure b. diode c. modulator d. shift solenoid 7. Modern automatic transmissions use ______________ ______________ instead of a centrifugally operated governor valve to determine transmission shaft speeds. a. speedometer gears b. vacuum diaphragms c. speed sensors d. spool valves 8. Which automatic transmission assembly provides a means of uncoupling the engine/dynamotor