The previous Buick Envision had a very high reputation in China, but the price of the car was also beyond the reach of many customers. However, due to changes in time, Envision's entire series has now been reduced by 40,000 yuan in price, which has attracted the attention of many consumers. So let's take a look at the Envision gearbox that everyone is most concerned about?
It can also be seen from the models currently on sale that the Buick Envision has two models, 2020 and 2021. Among them, the entire range of 2021 models is equipped with 7-speed Dry dual-clutch gearbox, while the 2020 model uses a 9-speed automatic manual gearbox.
In the original memory of many people, dry dual-clutch gearboxes are very bad, but in fact, dry dual-clutch gearboxes did have more problems ten years ago, such as being very easy to be too soft. The motor control module and the clutch plate are also the areas where dry dual-clutch gearboxes are most prone to problems, such as severe vibration in low gears. Most of them cost thousands of dollars to repair once.
However, due to the development of new technology, the performance of today's dual-clutch gearboxes is already very good, and the vibration problem has been greatly improved, so we don't have to wear colored eyes to treat dry transmission. Dual clutch gearbox. Of course, if you have sufficient budget, we may recommend choosing a model with a 9-speed manual transmission.
At present, the quality of the Envision 9AT gearbox is probably very stable. Compared with the GM 6AT gearbox that was previously ridiculed by drivers as a "metal mixer", the 9AT can be said to be incompetent by GM. A complete improvement. The GM 9AT gearbox is more suitable for my country's road conditions in terms of gear matching, when to shift gears, and smoothness.
The GM 9AT gearbox is also equipped with three new technological highlights, including a selectable one-way clutch, a start-stop energy storage device, and the ShitfbyShitf patent. The optional one-way clutch is an important technical key on GM's 9AT gearbox.
Many people think that there is no clutch in the AT gearbox, but in fact, in order to better complete the conversion of neutral gear, forward gear and reverse gear, a clutch needs to be installed. In the past, the GM 6AT gearbox used a multi-built-in clutch, but this type of clutch was too large and required a lot of electronic control systems to complete, and it seemed impractical for a 9AT gearbox with a large number of gears.
Therefore, GM installed an optional one-way clutch in the new upgraded 9AT gearbox. This clutch only needs to pass through a partition to complete the conversion of forward gear, neutral gear and reverse gear. The partition can be controlled according to the steam pressure. The optional one-way clutch has the advantages of smaller volume and lighter weight, making the 9AT gearbox more compact.