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What is the difference between CVT and ECVT, and which one is more durable?

2 Answers

RafaelLee

07/24/25 1:16pm

ECVT can only be used in electric or hybrid vehicles and is not compatible with gasoline engines. It adjusts speed through electric motors, features an all-gear structure, can withstand greater torque, and offers higher efficiency and faster speeds. CVT is a transmission developed specifically for gasoline engines, with multiple gears and convenient tuning. Since these two devices are designed for different types of vehicles, it is not possible to compare which one is more durable. The differences between CVT and ECVT include structural variations, different working principles, and distinct power solutions. Below are the differences between CVT and ECVT: 1. Structure: CVT mainly consists of two sets of pulleys (drive and driven), a steel belt, oil pump, torque converter, sensors, control computer, and other components. Its complex structure is typically used as a transmission system in small vehicles. ECVT has a simpler structure, comprising only one set of planetary gears and two electric motors. 2. Power transmission: CVT connects to the power output shaft to transmit power. ECVT not only transmits power but also enables power output. 3. Power solution: ECVT can achieve continuously variable transmission and provide power output for electric motors, functioning as a power distributor. CVT, on the other hand, is a standard continuously variable transmission.

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DePaislee

08/11/25 7:19am

As a car enthusiast, I often compare different transmissions. CVT changes gear ratios via belts and pulleys, delivering smooth acceleration, but the chains or belts are prone to wear, potentially causing noise or slippage over time. eCVT, used in hybrids like the Toyota Prius, relies on motors and planetary gears, eliminating belt wear risks while maintaining smooth and quieter operation. In terms of durability, eCVT wins—hybrid batteries last long, often exceeding 150,000 km without part replacements under normal use; CVTs require chain inspections every 50,000 km, or failure rates rise. Test-driving a friend’s car, I noticed CVTs struggle on steep slopes, while eCVT responds swiftly with better fuel efficiency, ideal for long-term ownership. Remember: regular maintenance extends lifespan—never skip transmission fluid changes.

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