12 Questions
What is the name of the transmission used in the 2020 Explorer and Lincoln Aviator plug-in hybrid?
10R80 MHT
What is the purpose of the torque converter in the 10R80 MHT transmission?
To improve towing and hauling capabilities
How much power does the electric motor in the Toyota/Lexus power-split device generate?
33 kW
Which Toyota models use the power-split transaxle with the power-split device?
Prius and Camry Hybrid
How many electric motor/generators are used in the power-split transaxle?
Two
Which gear in the power-split transaxle does the ICE split its torque output between?
Sun gear (MG1
What is the function of MG1 in the power-split transaxle?
Starting under all conditions
When is both MG2 and the ICE used for torque output in the power-split transaxle?
Full-throttle acceleration
How many major assemblies does the power-split transaxle have?
Two
What does the Toyota Prius' transaxle oil pump do?
Only active when the ICE is running
What type of gear set does the eCVT transmission in Toyota vehicles use?
Planetary gear set
Which vehicle uses an Integrated Drive Module with a single-speed gearbox?
Ford Mustang Mach-E
Study Notes
- The 10R80 MHT is a modular ten-speed hybrid transmission used in the 2020 Explorer and Lincoln Aviator plug-in hybrid.
- It uses a torque converter for improved towing and hauling capabilities.
- The electric motor generates 33 kW of power and is monitored by the powertrain control module (PCM).
- The Toyota/Lexus power-split device is used in several models, including the Prius and Camry Hybrid.
- The power-split transaxle is built around a single planetary gear set and two electric motor/generators (MG1 and MG2).
- The ICE splits its torque output between the sun gear (MG1) and the ring gear (MG2 and drive wheels).
- MG1 is used for starting under all conditions and operates as a generator during deceleration.
- Full-throttle acceleration and high-speed cruise use both MG2 and the ICE for torque output.
- The power-split transaxle has two major assemblies, each with its own water jacket for cooling the motor/generator windings.
- The system does not use a conventional clutch or torque converter.
- The Toyota Prius has a transaxle oil pump that is only active when the ICE is running.
- The eCVT transmission in Toyota vehicles uses a planetary gear set to control gear ratio.
- The electric rear drive axle in Toyota vehicles has three modes of operation.
- The electric motor in the Q211 is rated at 67 horsepower (55 Kw).
- Most production electric vehicles use a single-speed transmission.
- Single-speed gearing improves energy conversion efficiency in electric vehicles.
- The Ford Mustang Mach-E uses an Integrated Drive Module with a single-speed gearbox.
- The original Tesla Roadster had a two-speed transmission.
- The Porsche Taycan uses a two-speed transmission for improved acceleration and efficiency.
- The Porsche Taycan's rear gearbox uses a single planetary gearset and two clutches.
Do you know your transmissions? Test your knowledge with this quiz on the latest technologies in hybrid and electric vehicle transmissions. From the 10R80 MHT to the Toyota/Lexus power-split device, learn about the different types of transmissions and their unique features. Find out which vehicles use torque converters, planetary gear sets, and electric motors. See if you can identify which transmissions earn high marks for efficiency, acceleration, and towing capacity. Take the quiz now and become a transmission expert!
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