Strive for the top ten in the world to analyze Geely 7DCT330 gearbox
[Aika Auto New Energy Channel Original]
The mention of "double clutch gearbox" may be associated with many problems such as jitter, frustration and overheating, and even some are deeply rooted. However, the formation of these impressions stems from the negligence of the localization adaptation of the dual-clutch gearbox that everyone came into contact with in the early days.
Details determine success or failure. The gearbox not only carries the function of providing efficient power transmission for the whole vehicle, but also is closely related to comfort. A competent gearbox does not disturb the driver’s actions as much as possible and provides efficient transmission. Powershift’s own structural characteristics are doomed to its nearly "seamless docking" shift process and high transmission efficiency. However, the research and development of dual-clutch gearbox in China is still in its infancy. Geely Automobile released the 7DCT330 dual-clutch gearbox in October 2017 and assembled it in its models, which not only covers traditional fuel vehicles, but also has its place in new energy. Next, let’s learn more about 7DCT gearbox.
7 DCT Convention can provide vehicles with different versions of two-wheel drive and four-wheel drive, and 7DCT Hybrid only provides two-wheel drive versions due to the influence of motor layout. And according to the vehicle environment in China market, frequent starting and stopping and low-speed driving, the 7DCT wet dual-clutch gearbox can provide lubrication and heat dissipation more effectively, and avoid accidents such as overheating.
This outstanding achievement comes from Geely’s strict bench test specification, which makes the durability more guaranteed. At the same time, the strict standards naturally improve the manufacturing accuracy and play a key role in further improving NVH.
Through the analysis of technical data, I believe that everyone has a preliminary understanding of this 7DCT wet dual-clutch gearbox. After the meeting, we conducted a simple test drive for the models equipped with 7DCT to see how this gearbox performed on different models.
I. Link 01
Second, Link 03
Lectra 03 is based on CMA basic module architecture, equipped with a 1.5T three-cylinder engine, with a maximum power of 132kW(180Ps) and a peak torque of 265Nm. In terms of transmission system, it is equipped with 7DCT wet dual-clutch gearbox.
Third, Borui GE MHEV
The only hybrid car in our test drive this time, Borui GE MHEV (light hybrid version) is the first medium-sized car equipped with a 48V light hybrid system in China, with a comprehensive power of 142kW(193Ps) and a comprehensive torque of 300Nm, matching the 7DCT Hybrid version gearbox.
Although the test drive process of the three models is very short, we only experience the working state of the gearbox. In the end, I think the Borui GE MHEV model is the smoothest, and the shift gap is almost imperceptible. Secondly, the Lectra 01 model is closely followed. Although the overall performance of the gearbox is not as good as that of the hybrid model, no matter whether it starts to stop or accelerates and decelerates rapidly, there will be no adverse phenomena such as jitter and frustration that everyone is worried about. Through a brief test drive, the LECK 03 can clearly feel that the driving style is biased towards sports, and look forward to the performance after listing.
About "Selection of Top Ten Transmissions in the World"
7DCT wet dual-clutch gearbox, as a core component carefully built by Geely, is confident to compete in the selection of the world’s top ten gearboxes. Of course, relevant judges are invited this time, and valuable opinions are also put forward for gearbox design, production and manufacturing.
Editor’s comment:Going further and further in car-building technology is not only the final route for China car companies, but also it is urgent to improve fuel economy, at the same time, it cannot be at the expense of users’ comfort. The reliability of core components is also worthy of people’s attention. As a new product, we need to be tolerant and have full confidence in the OEM.