[Evaluation] has been listed on August 21st, and it has become one of the most concerned models on car home website. The most striking thing is its brand-new "1.5T+ dual clutch" powertrain. This article focuses on its dynamic performance, especially the first performance of its own brand. As for the introduction of exterior interior and space, please refer to the static experience article for interested readers (click to enter).
This 1.5T model named BYD476ZQA has been seen in the world, with a maximum of 113kW (154hp) and a maximum of 240Nm, which completely surpasses the ordinary 2.0L naturally aspirated engine in terms of parameters. It is matched with the 6DT25 gearbox, with a maximum bearing torque of 240 Nm, which is just enough to match the engine.
Regarding the origin of the engine and gearbox, our colleagues in science and technology once made a detailed 1.5TID technical disclosure (click to enter). It is found that most of its structures are very close to the 1.4 engine and 7-speed gearbox. In fact, it is obtained by "reverse research and development" of the familiar Volkswagen 1.4 TSI+G.
BYD is not a simple imitation. It requires a lot of hardware. The key components are provided by internationally renowned suppliers, and the level of suppliers is no less than that of joint venture brands. In addition, the manufacturers have made some technological innovations, such as using aluminum alloy cylinder to reduce the weight, and the dual clutch module and electronic control unit (TCU) of the gearbox are also independently developed.
In daily driving, this power system works well most of the time. The 1.5T engine is relatively soft below 2000 rpm, and it starts to exert its strength obviously after more than 2500 rpm, and lasts until more than 5000 rpm. The shifting of gearbox between 1st gear and 2nd gear is a bit rough, and the shifting action of other gears is tight, and the setback is greatly reduced, which reflects the smoothness of dual clutch.
In the middle of the sudden acceleration, the response of the gearbox is slightly dull. In some cases, even if the accelerator is depressed halfway, it is unwilling to downshift, so it can only rely on the engine to fight alone and try to inject fuel. Fortunately, its low speed torque is enough and the sense of acceleration is barely acceptable.
If you want to get the best performance, you must step on the accelerator decisively, but you still don’t expect the gearbox to bring surprises. The downshift is always full of worries and lack of passion. Thankfully, the engine never lets people down. After the engine speed is raised, the whole car is finally refreshed, and the acceleration becomes carefree. When the speed exceeds 100 km/h, there is still stamina, which is comparable to the level of natural inhalation of most mainstream 2.4L
Like other dry dual clutches, Speedy 1.5TID is not very good at driving in congested road conditions. Frequent acceleration and braking make it hard to cope, accompanied by faint metal knocking, and the engine speed fluctuates slightly, which greatly reduces the ride comfort.
Speed Sharp adopts a steering device, the feedback is slightly biased, and the pointing accuracy in the middle small angle range is intentionally reduced to take care of comfort. The chassis is redeveloped, with no qualitative change in structure, and it is still a common torsion beam rear suspension. The overall feeling of the car body is improved compared with the previous products, and the feedback on road vibration is concise and neat, instead of emphasizing softness blindly, it maintains appropriate support.
In fierce driving, the body attitude feedback is timely, the suspension damping is linear, and the front direction is clear enough to be easy to control, which adds confidence to the driver. Another good thing is that the body stability control system is very delicate and always gently pulls the vehicle back from the out-of-control edge. Please see the performance test results of Su Rui on the next page.