Chevrolet Volt 4ET50 Transaxle Components and Operation
0:00 Introduction
2:20 General Description
2:50 Major Components
5:00 EV Mode
9:20 Electric Only Combined (Engine Off) Mode
11:23 Extended Range Mode
14:58 Mountain Mode
16:16 Disassembly
23:36 Powerflow
27:30 Summary
Corrections:
I made an error on the Motor B to tire gear ratio, it is actually 7.001:1.
The planetary gear reduction is (1+(83/37)) = 3.243:1
The transfer gear reduction is (67/79) = 0.848:1 overdrive
The final drive gear ratio is (79/31) = 2.548:1
The result is 3.243*0.848*2.548 = 7.001
This 4ET50 transaxle was used in Chevrolet Volts from 2011-2015. The 2016 and above models of the Volt use a 5ET50 transaxle.
There are four possible transmission operating states (Modes) to move the vehicle in Drive and Reverse:
- Mode 1. One Motor Electric Vehicle (Series Mode Engine Off) - The Variable Low &1,2, R Brake is used (Ring gear connected to case). Drive motor/generator B is driving the vehicle
- Mode 2. Combined (Two Motor) Electric Vehicle (Output Split Engine Off) - The Variable High & 2,3,4 Clutch used (Ring gear connected to Motor A). Drive motors/generators A and B are rotating at variable speeds to obtain underdrive, direct drive or overdrive to drive the vehicle.
- Mode 3. Series - Series Hybrid (Series Mode Engine On) - Variable Low & 1,2, R Brake and 1,3, R Clutch used ((Ring gear connected to case) and (Engine connected to Motor A) ) Same as mode 1, but with the engine driving motor A to provide power to motor B rather than battery power.
- Mode 4. Combined - Series-Parallel Hybrid (Output Split Engine On) - Variable Hight & 2,3,4 and 1,3, R Clutches used ((Ring gear connected to Motor A) and (Engine connected to Motor A)). Same as mode 2, but with the engine driving motor A.
ABOUT US:
Weber State University (WSU) - Department of Automotive Technology - Ardell Brown Technology Wing - Transmission Lab. This video shows the components and operation of a 2013 Chevrolet Volt 4ET50 Extended Range Transaxle.
W.S.U is a leader in Hybrid and Electric Vehicle education. This topic is taught as part of our 4-year bachelor's degree program. For information on joining the Weber Automotive program, visit: [ Ссылка ]
This video was created and edited by Professor John D. Kelly at WSU. For a full biography, see [ Ссылка ]
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Questions:
1. Does the Volt's 2-motor, inline axis, hybrid transaxle, operate like the Toyota, Ford, and Chrysler hybrid transaxles?
2. How many modes of operation does the Volt transaxle have?
3. How many hydraulic clutch packs are in the 4ET50 transaxle?
4. How many planetary gear sets are in the 4ET50 transaxle?
5. What component is connected to the planetary sun gear?
6. What component is connected to the planet carrier?
7. What component is connected to the planet ring gear?
8. What are the four modes of transaxle operation?
9. Can the internal combustion engine (ICE) directly connect to the wheel to drive the vehicle?
10. Can both motors A and B drive the vehicle?
11. How is the ICE started?
12. Can the ICE's power be disconnected from the transaxle?
13. What is different about the 2016 2nd generation Volt transaxle that was discussed in the video?
14. Tell me one thing you learned from this video that you thought was interesting?
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