Why doesn't Volkswagen use CVT?
2 Answers
Volkswagen does not use CVT because its models are equipped with its self-produced DSG dual-clutch automatic transmission, and using a CVT transmission would incur higher costs. The following are relevant details about dual-clutch transmissions: 1. Advantages: The most notable feature of dual-clutch transmissions is their smooth gear shifting. The method of alternating between two clutches for gear changes allows the smoothness of wet dual-clutch transmissions to even rival that of CVT continuously variable transmissions. Moreover, the structure of dual-clutch transmissions is similar to combining two AMT transmissions, making the shifting process more direct. 2. Disadvantages: Issues such as the stability of dual-clutch transmissions and noise problems have become points of criticism. However, because the structure of dual-clutch transmissions is more complex than that of conventional transmissions, their manufacturing costs are also higher. Similarly, the increased complexity leads to a higher failure rate. Additionally, dual-clutch transmissions cannot endure prolonged low-speed driving and frequent starts in urban conditions, which increases internal wear and tear, leading to frequent failures after a period of use.
Why doesn't Volkswagen use CVT? I've thought about this quite a few times, and I believe it's because they've placed their bets on the dual-clutch transmission DSG. DSG is their own technology, and it pairs exceptionally well with those turbocharged engines—shifting gears lightning-fast, fuel-efficient yet powerful. As for CVT, although smooth and suitable for fuel-saving family cars, its acceleration isn't crisp enough, and the engine sound is a bit dull, significantly reducing the driving pleasure. Volkswagen cars, like the Golf GTI, pursue a sporty feel, and CVT just can't deliver that passion. Technically speaking, CVT's chains or belts are prone to wear under high torque, and most Volkswagen models are high-torque, making CVT unreliable. Reliability issues are also a reason; I've heard mechanics talk about CVT overheating and slipping, and Volkswagen might have avoided this pitfall. In terms of production costs, the DSG production line is already well-established, and switching to CVT would be costly and not worthwhile. By the way, with the rise of electric vehicles, Volkswagen's ID series directly uses electric drive systems, making transmissions secondary, and they probably see no need to revisit CVT.
