The debate about the advantages and disadvantages of different gearboxes has never stopped. Many people have an inherent knowledge of the gearbox, and feel that the gearbox they use is always the best. But obviously this is not objective. Today, I will analyze the mainstream gearbox specifications on the market for everyone. Who has the advantage?
AT gearbox
AT one time, when major manufacturers didn’t reduce the production and R&D expenses, the gearboxes used in most models were AT automatic gearboxes, which were also more traditional automatic gearboxes. Compared with ordinary manual gearboxes, the planetary gear structure cancelled the clutch and the power was connected by hydraulic torque converter. By adjusting the tooth ratio between different planetary gears and sun gear, the purpose of speed change can be achieved. AT present, there are a variety of AT gearboxes on the market, with 6AT as the mainstream and 10AT as the high-end of 8AT. For most German luxury brands, ZF’s 8AT is a frequent visitor, while Mercedes-Benz has always insisted on using its own 7AT or 9AT gearbox. Of course, the best word of mouth among the people is still Mazda’s 6AT parallel gearbox, because the shift locking range has been re-optimized, so the shift feeling is obviously more positive than the traditional AT gearbox, and the experience is better. Although the number of gears is small, in terms of driving experience, it is not lost to the gearbox with higher specificATions at all, and it is not an exaggeration to call it the most civil AT gearbox.
continuously variable transmission
In recent years, in order to reduce the manufacturing cost of the whole vehicle, more and more Japanese manufacturers have joined the camp of CVT gearboxes. Not only Nissan, Toyota and Honda have a tendency to fully popularize CVT gearboxes. CVT gearbox is very different from the traditional gearbox. Power transmission is realized through two sets of bevel wheels and steel. Compared with the traditional AT automatic transmission gearbox, it is extremely silky to switch the gear ratio without gears. Especially the riders who often drive in urban areas can feel the incomparable smoothness and smoothness of CVT gearbox. Of course, CVT gearbox also has shortcomings that cannot be ignored. The most obvious disadvantage is that the gearbox is easy to be protected when accelerating rapidly, and it cannot release the maximum torque of the engine. However, in recent years, Toyota has also made continuous efforts in CVT gearbox, and launched CVT gearbox code-named Direct Shift. At low speed, gears can be directly used for driving, and steel belt transmission can be adopted after the speed increases. The efficiency is much stronger than that of Nissan’s X-TRONIC automatic gearbox.
dualclutchtransmission
For the majority of German car owners, the dual-clutch gearbox may be the most common contact in daily life. Regarding the dual-clutch gearbox, the controversy in the market has never stopped, and many people have a bad impression of the dual-clutch gearbox. Because many years ago, many German manufacturers introduced their own dual clutches into China without optimization. Due to the complexity of domestic road conditions, the previous dual-clutch gearbox is generally not competent for domestic road conditions. Especially in the case of traffic jam, the dual-clutch gearbox switched back and forth between low-speed gears, which impressed many car owners, so many people felt very sorry at that time. In recent years, consumers can find that the double clutch has changed quietly. The biggest change is to optimize the shift logic in traffic jams and slow down the shift speed, so that the overall feeling can be closer to the traditional automatic transmission.
Compared with CVT gearbox and AT gearbox, the power connection efficiency of dual clutch is comparable to that of the former. There used to be riders testing Volkswagen’s DSG gearbox, and the transmission efficiency of more than 90% really made many competing products ashamed. Although Volkswagen’s DSG may not be as long as the traditional AT automatic gearbox, the lightning shift speed is also fascinating.
How to choose?
This may be the most tangled thing for the majority of riders, and they want the lightning speed of double clutch and the silky shifting feeling of CVT or AT gearbox. The author wants to say that if you are in a congested downtown area or an extremely slow driving speed for a long time, AT or CVT gearbox is actually the best choice. For those riders who often need to run at high speed when working in the suburbs, dual clutch may be a more sensible option. Under different road conditions, all kinds of gearboxes can show their advantages and disadvantages, so there is no best gearbox in the world, only the gearbox that suits them best.
develop
The trend of new energy is rolling in like a flood, and various manufacturers have gradually introduced their own transmission systems based on electric transformation. Compared with the traditional fuel car, the cost of electrification is hard to ignore, but it is obviously more economical to think about the gearbox. Both BYD and Mercedes-Benz, Volkswagen and Geely have launched their own gearbox systems based on the electric architecture. So what is the significance of electrification? For the traditional AT or CVT gearbox, the electric transformation can effectively improve the shift response of the gearbox at a lower speed to improve the power output feedback. For the electric modified dual-clutch gearbox, it can make the jitter in traffic jam negligible.
Write it at the end
Of course, which gearbox to choose depends on consumers, because everyone’s consumption needs are different and their consumption habits are different. Again, there is no best gearbox, only the gearbox that suits you best, what do you think?
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