[car home] Although electrification is the general trend of automobile development, high-efficiency hybrid or plug-in hybrid vehicle is undoubtedly the best transition scheme at present, and it will become one of the protagonists in the market for a long time. Today’s plug-in hybrid cars are very different from those of a few years ago, both in terms of feed power/fuel consumption and overall driving quality have been qualitatively improved. Among them, BYD’s DM-i technology is regarded as the pioneer of its own brand in the field of high-performance hybrid, which has won gratifying sales and super-high attention, while DHT hybrid technology from the Great Wall, although late, has more perfect strength to challenge DM-i technology. Today, we will let the representative models of these two technologies, Wei Pai (|) and BYD Tang DM-i, come face to face and see what kind of sparks will collide.
The prices of Latte DHT-PHEV and BYD Tang DM-i are basically around 250,000. We choose the two-wheel drive version of Latte DHT-PHEV and the 2021 Tang DM-i 112KM version for comparison, and they are basically the same in driving form and price range.
The working principle of this hybrid system under some working conditions is actually similar to BYD Tang DM-I. In the pure electric mode, after the vehicle starts, the engine only acts as a generator under the medium and low speed series working conditions, and does not directly participate in the driving, and is only responsible for supplying the generated electric energy to the battery for charging or the motor for driving the vehicle.
However, the difference of Latte DHT-PHEV lies in the addition of its 2-speed DHT gearbox, which can realize the direct drive of parallel engines in the low speed range of about 40km/h, and the transmission efficiency of DHT gearbox is as high as 98%, which is of great help to fuel economy. When there is a big power request, the engine and the motor can work together to drive the vehicle at any time, and get a sharper acceleration experience. However, in the middle and low speed range, Tang DM-i can only power the motor through the engine and battery to drive the vehicle, and there is delay and loss in the process of energy conversion, so the acceleration experience is inferior.
In addition to the improvement of dynamic response speed, the special DHT gearbox for 2-speed hybrid power will shift into the second gear when cruising at high speed, so as to allow the engine to enter the operating range with the best fuel economy and further reduce fuel consumption, while the whole gear shifting action is silent, with no obvious sense of intervention, and the body feeling of people in the car is not obvious.
With an efficient hybrid system, combined with a special 1.5T engine for hybrid power and a large-capacity power battery. The system of the two-wheel drive version of Latte DHT-PHEV has a comprehensive maximum power of 240kW(326 HP) and a comprehensive maximum torque of 530N·m, which can achieve a pure electric cruising range of 184km. Even in the state of power shortage, the comprehensive fuel consumption of the vehicle can be controlled at 5.4L/100 km (comprehensive cruising range of 1000+ km), which is in terms of power, fuel economy and high-purity electric cruising range.
The structure of BYD’s DM-i hybrid system is relatively simple. In most cases, the engine is only used as a generator to provide power for the motor. It does not participate in the driving of the vehicle at low and medium speeds, but is only responsible for generating electricity, which is the same as the extended range mode of extended-range electric vehicles.
When the vehicle is driving at medium and high speed, the engine comes to the efficient working range. At this time, although the engine can directly drive the vehicle, it can only move forward at a fixed gear ratio. The engine can’t directly participate in the driving in the low-speed state of Tang DM-i hybrid system, and the response is not fast enough; On the other hand, under high-speed road conditions, although the engine can be directly driven at this time, it can only drive at a fixed gear ratio, and its fuel economy is bound to be inferior to that of latte DHT-PHEV.
The appearance and style have their own characteristics.
After seeing the invisible core technology differences, let’s compare the two cars that can be seen by people. First of all, in terms of design style, the two cars have their own characteristics.
As a luxury brand SUV, Wei brand latte DHT-PHEV gives people the first impression that it is luxurious and stable enough; Tang DM-i continues BYD’s family-style Dragon Face design language, and the whole car looks more dynamic. Both Latte DHT-PHEV and BYD Tang DM-i have a huge air intake grille area. In contrast, Latte DHT-PHEV has more sharp edges and corners, while Tang DM-i has more rounded and feminine features.
Headlights of the two cars generally adopt a long and narrow design style, and the far and near lights are all LED light sources, and they are all equipped with LED daytime running lights, automatic headlights and adaptive far and near lights.
Because Tang DM-i locates the medium-sized SUV, its body size is more prominent than that of Latte DHT-PHEV, and its overall visual experience is also more slender. Tang DM-i has a length/width/height of 4870/1950/1725(mm) and a wheelbase of 2820mm；; Latte DHT-PHEV is 4668/1890/1730(mm) with a wheelbase of 2745 mm.
Latte DHT-PHEV’s rim is dynamic, and it is equipped with Michelin Haoyue 4 tires at any cost, which pays attention to silence and comfort and is not weak in grip and handling. Tang DM-i is equipped with 245/45 R20 Jiatong Comfort225 tires, although the specifications are one size larger than that of Latte DHT-PHEV, but the price and cost are quite different.
The rear of latte DHT-PHEV is full of layers, which gives people the same feeling of stability and honesty as the front. Tang DM-i adopts through taillight design and still takes a dynamic route.