Planetary Gear Set Operation - AUSV 2520

Video Description

See a demonstration of the basic mechanical operation of a planetary gear set TIMELINE: 0:00 Introduction 0:45 The parts of a simple planetary gear set 1:50 Possible gear ratios of a single planetary gear set 2:18 Underdrive gear ratios 2:54 Overdrive gear ratios 3:50 Reverse gear ratios 4:00 Direct drive ratio 4:16 Usable gear ratios 6:18 The physical size of gears is related to their torque capacity 7:35 How power is transferred through a planetary gear set 8:58 Reverse 9:12 Underdrive 10:00 Overdrive 10:25 Direct drive 11:32 The three Allison 1000 transmission planetary gear sets 12:53 Parking gear and pawl 27:05 Function of Five Allison transmission clutch packs 31:25 Allison 1000 Clutch application chart 33:40 Universal transmission operation theory 38:34 Powerflow through the Allison 1000 planetary gear sets 40:37 First gear 42:19 Second gear 43:38 Third gear 44:21 Fourth gear 45:12 Fifth gear 46:10 Sixth gear 46:35 Reverse 47:48 Troubleshooting 50:32 Video summary This video is intended for students in the online AUSV 2520 Automatic Transmissions class at Weber State University in Ogden, Utah. This class is normally taught face-to-face, but due to the COVID-19 Pandemic in 2020, I am attempting to offer the class material online. Suggested quiz questions are shown below the video timeline. Questions for teachers: 1. What are the three main pieces of a simple planetary gear set? 2. How many underdrive gear ratios are possible with a simple planetary gear set? 3. How many overdrive gear ratios are possible with a simple planetary gear set? 4. How many reverse gear ratios are possible with a simple planetary gear set? 5. How many direct gear ratios are possible with a simple planetary gear set? 6. How many usable/practical gear ratios are possible with a simple planetary gear set? 7. How is power typically transferred through a simple planetary gear set? 8. How does the parking gear keep the vehicle from rolling in the park position? 9. What does the term "Compound simple planetary gear set" mean? 10. What is the function of the clutch packs in the Allison 1000? 11. What component in a transmission causes clutch packs to apply? 12. What component controls the valves in the valve body? 13. What component controls the electronics in the valve body? 14. Use the Allison 1000 clutch application chart download from below for the remainder of the questions 15. Which clutches are used to provide first gear? Choose two: C1, C2, C3, C4, C5 16. Which clutches are used to provide second gear? Choose two: C1, C2, C3, C4, C5 17. Which clutches are used to provide third gear? Choose two: C1, C2, C3, C4, C5 18. Which clutches are used to provide fourth gear? Choose two: C1, C2, C3, C4, C5 19. Which clutches are used to provide fifth gear? Choose two: C1, C2, C3, C4, C5 20. Which clutches are used to provide sixth gear? Choose two: C1, C2, C3, C4, C5 21. Which clutches are used to provide reverse gear? Choose two: C1, C2, C3, C4, C5 22. Tell me one thing you learned or found interesting in this assignment? Download the Allison 1000 clutch application chart at https://weberstate.box.com/s/3tat9skibfnbo0kcm3yrdu0w3xvq7rs0 ABOUT US: Weber State University (WSU) - Automotive Technology Department - Automatic Transmission Lab. A technical description and demonstration of the basic mechanical operation of a planetary gear set in an automatic transmission or transaxle. Components from the Allison 1000 Transmission were used in the majority of this video. We teach current vehicle technologies to our automotive students at Weber State University and online. For more information visit: http://www.weber.edu/automotive This video was created and edited by John D. Kelly at WSU. For a full biography, see http://www.weber.edu/automotive/J_Kelly.html Visit my other youtube channel https://www.youtube.com/user/vibratesoftware to see the amazing NVH app for vibration diagnosis! DONATE TO OUR DEPARTMENT Please consider a donation to the Department of Automotive Technology at Weber State University here: http://advancement.weber.edu/Automotive