Don’t Hate — eCVTs Are Genius Transmissions!

Summary by Krater

This video explains the mechanics of electronically controlled continuously variable transmissions (eCVTs) using a ConsulLab hybrid planetary gearset trainer and a Ford Maverick hybrid. It details how two electric motors interact with the planetary gearset to achieve infinite gear ratios without belts or pulleys.

From the video

Answers: How do eCVT transmissions work using a planetary gearset and electric motors?

• eCVT operation
• planetary gearset mechanics
• hybrid vehicle transmissions
• motor-generator interaction
• gear ratios in hybrid cars

What it concludes

• eCVTs use a single planetary gearset paired with two electric motors to create infinite gear ratios without belts or pulleys.
• The green motor acts as a starter-generator to start the engine and generate electricity, while the blue traction motor powers the wheels or acts as regen braking.
• Traditional geared transmissions cannot hold engine RPM at peak efficiency or peak power continuously across speed ranges, whereas eCVTs can decouple vehicle speed from engine RPM.
• Ford and Toyota have used eCVT hybrid transmissions successfully for decades, dating back to the 1990s Prius and 2005 Escape Hybrid.
• Manufacturers sometimes artificially program RPM drops during acceleration to mimic traditional automatic transmissions because drivers dislike the constant RPM sound, sacrificing optimal performance.