![]() ![]() Not only in regards drastic reduction to the dreaded rubber-band effect and associated droning inherent with CVTs, but also in terms of returning a decent fuel economy figure, especially when compared to the outgoing six-speed automatics. In regards to how it actually works in the real world, reviews about this new transmission has been largely positive, with many saying that it is a marked improvement over many of the CVTs on the market today. Another benefit of this chain belt system is that it also has a longer lifespan and is maintenance free, which makes it more reliable. The first in the segment, it utilises the tension of the belt instead to adjust the pulley diameter, thus eliminating the instances of slippage and improving the efficiency in power delivery. So to address this issue, Hyundai has instead implemented a chain belt system in place of that metallic belt. A phenomenon that is especially common on small cars, where the pulleys apply pressure to the narrow area on the belt’s side to adjust the diameter. One drawback to this system though is that the pulleys and the belt often slip against each other, thus causing a reduction in transmission efficiency. It is then the contraction and expansion of said belt that alters the diameter of these pulleys, hence varying the gear ratio. One of which is connected to the engine output shaft, and the other is connected to the driveshaft. To those unfamiliar with the inner workings of a traditional CVT, an oversimplification of how this transmission works is that there is a metallic belt within the gearbox that links two pulleys together. Meanwhile on the responsiveness aspect, the new Shift Control Strategy featured with SmartStream IVT apparently reproduces the shifting pattern of a conventional automatic, which supposedly better reflecting the driver’s intent and driving conditions and therefore making it feel more responsive than the rubber-band effect normally associated with CVTs.Īll these bold claims from this Smartstream IVT, especially in terms of its efficiency, originates from one main innovation over traditional CVTs, and that would be the use of a chain belt instead of a metallic belt as the main power transfer mechanism within the gearbox. On the efficiency front, paired with a Smartstream G1.6 MPi four-cylinder in the new Elantra, an 8-speed variant of this novel transmission supposedly improves fuel economy by some 4.2%, and engine power loss by a margin of 5-8%. This is all because of Hyundai’s recent claims that its new SmartStream Intelligent Variable Transmission (IVT) is able to provide maximum efficiency, yet also be able to provide better responsiveness and smoothness compared to traditional CVTs on the market today. It is however the last one on the list that has been generating some considerable headlines as of late. The Korean automotive conglomerate is the only auto group in the world to currently have cars that feature all the four main gearbox types within its lineup: automatic, manual, dual-clutch and continuously variable transmissions (CVT). Here’s a surprising fact for the day, the Hyundai Motor Group is currently the only automaker in the world to comprehensively possess the technology for all transmission types. The clever new Smartstream Intelligent Variable Transmission (IVT) looks to be a giant leap forward over the conventional CVTs. ![]()
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