IVT transmission

In general, the CVT English name Continuouslv Variable Transmission, referred to as the CVT, also known as a continuously variable mechanical continuously variable transmission. The biggest difference this transmission gear automatic transmission, which eliminates the need for complex and bulky gear combination variable transmission, while using only two sets of pulley variable transmission. By changing the contact radius of the driving belt on the drive wheel and the driven wheel for shifting.Transmission belt generally use a rubber band, metal band, metal chain, its advantages of light weight, small size, fewer parts, higher operating efficiency compared with AT, lower fuel consumption. But the shortcomings of the CVT is obvious, that is, the drive belt easily damaged or slipping, can not bear a greater load. A can now withstand the large load of the CVT has already started, its structure is not the same as with the present CVT, called the infinitely variable speed mechanical CVT, English name Infinitely Variable Transmission, referred to the IVT. This transmission First, the development of by Torotrak company in the United Kingdom and registered the patent, but the industry has been regarded as the CVT, until March 2003, held in Detroit at the annual meeting of the SAE (Society of Automotive Engineers) before it a separate category.
Introduce IVT transmission, first to recall the early years, there have been a continuously variable transmission, a friction plate transmission structure that appeared in 1905. It is constituted by the disc and the roller, the structure is simple, but because of friction itself brings energy loss and high temperature, there is the transfer torque is small and not durable material and other shortcomings, not mass. However, this shift principle forms the basis of the IVT.
IVT with other automatic transmission the most significant one of the difference is not a torque converter, and IVT Torotrak developed using the two sets of clutch, driving force is by a set called Variato apparatus passed through the lockup clutch and the planetary gear mechanism. the power transmitted to the drive shaft.
IVT core part of the disk by the input drive and output drive disk and Variator drive disk. Respectively located at the ends of the two input drive disc, the output only a drive plate located in the intermediate position, Variato drive plate is sandwiched between the input of the drive plate and the middle of the output drive disc, and their point of contact between the lubricating oil do media between the metal no contact, by the angle variation change Variato means to achieve the continuous and infinite variation of the transmission ratio. The role of the torque converter is the engine power is transmitted to the transmission through the fluid medium, IVT because they do not use the torque converter, compared with other automatic transmission, IVT has high efficiency, easy to slip, low fuel consumption, the complexity of the process does not require expensive metal belts, simple structure, lower costs and a series of advantages, coupled with large torque, long-term operation without causing excessive heat, not only apply to cars also apply to off-road car.