Chery Kunpeng DHT hybrid has risen strongly, aiming at BYD DM-I. Is it qualified？

At the past Chengdu Auto Show, the first Kunpeng DHT hybrid model, Tiggo 8 PLUS Kunpeng e+, was launched, and the heat was still quite high. Since then, people around Kung Fu Car have been asking what the hybrid strength of Kunpeng DHT is. After all, it is the latest masterpiece of "Technical House" and whether it has surpassed the DM-i super hybrid system.

Kung fu car didn’t want to answer this question, but in fact, strictly speaking, the two are not a divination. DM-i is a HEV architecture made of PHEV, while Kunpeng DHT hybrid is a traditional PHEV architecture, adding some functions of HEV, which sounds a bit circuitous.

Let the Kung Fu car explain it to everyone. I can only say that these two can’t really hit each other.

(1) The biggest advantage of DM-I super hybrid is fast, economical, quiet and smooth.

First of all, it must be admitted that before DM-i, it has actually been mixed for many years, and it has also produced super-performance monsters with an acceleration of less than 5 seconds, but its influence is not the same as that of today’s DM-i, mainly because some key points have not been opened.

Let’s take a look at this ugly picture drawn by Kung Fu car. There are only six parts in total, which looks very simple, and this is the working schematic diagram of DM-I.

There are three driving paths, one is that the engine drives the generator and then drives the driving motor, the other is that the power battery drives the driving motor, and the third is that the engine directly drives the wheels through the clutch. Of course, it can also be driven by two sets of oil-electric drive chains at the same time, which is only used at ultra-high speed and rapid acceleration.

Very simple, in pure electric mode, it can be directly driven by battery, but at high speed with low motor efficiency, the engine will be directly driven. In most other hybrid modes, the engine drives the motor to work through the generator.

This is actually what we are trying to get through. The engine is more often used as a "charging treasure". It only uses the boring head to drive the generator to generate electricity, and then the motor only uses the boring head to drive the wheels. If there is excess electricity, it will be delivered to the battery. In this mode, the function of the power battery is greatly weakened, and it becomes an "energy pool". Of course, another point is that the engine can have average performance but high efficiency. After all, its biggest function is to generate electricity.

When driving in urban areas, 99% of DM-i vehicles are driven by motors, while 88% and 82% of DM-i vehicles are driven by motors under NEDC and WLTC conditions respectively. In other words, if you drive in the city, it is basically equivalent to a tram.

And what are the advantages of motor drive? First of all, it is fast. After all, it can output the maximum torque in the first time. Taking Qin PLUS as an example, its 0-100km/h acceleration time is 7.3 seconds, which is definitely fast enough. In fact, it is enough to save, not to mention pure electric driving. The fuel consumption in the state of power loss is 3.8L/100km. After all, the thermal efficiency of the engine is as high as 43%, while the conversion efficiency of the generator and the driving motor is above 95%. Then there is quietness and smoothness, which is also the inherent advantage of motor drive. After all, the acceleration of motor is absolutely linear, and the noise is much smaller than that of an engine with unstable speed.

Of course, in addition to being fast, economical, quiet and smooth, the DM-i system also has an advantage of being "green". The advantage of being able to get a green card allows it to reduce the dimension and attack electric vehicles. After all, the DM-i model has a comprehensive cruising range of more than 1200 kilometers, and just refuel, which fundamentally eliminates mileage anxiety, but it can still get a green card.

(2) Kunpeng DHT hybrid, dual-motor drive is the highlight.

Kun Peng DHT hybrid is the only hybrid system driven by dual motors in its own brand. It uses a special hybrid gearbox with multiple gear ratios to coordinate the work of engine and motor.

The core of this system is its hybrid gearbox, in which the engine supports three-speed transmission, plus the generator and driving motor, its generator itself can be driven, which is equivalent to three power sources. They cross out 11 gears, which can adapt to various road conditions. At the same time, it can also work in nine working modes, such as single and double motor drive, extended range, parallel connection and direct engine drive. The official saying is "three gears, nine modes and eleven speeds".

Theoretically, when a car has enough gears, its work will be more precise. After all, different gears correspond to different road conditions, but at the same time, the problem is that its control will be more complicated. In addition, although more gears can make the power output smoother, it is the coupling of oil and electricity through the gearbox, and it is impossible to be smoother and more linear than pure electric drive.

According to the data released by Tiggo 8 PLUS Kunpeng e+, the output power of its 1.5T hybrid special engine is 115kW, the maximum output power of the four-wheel drive version is 330KW, and the maximum output torque is 510Nm, even the output power of the two-wheel drive version is 240KW. This is still very powerful. The 0-100km/h acceleration time of its four-wheel drive model is 4.9 seconds, which is quite powerful.

Although no specific data has been released, it is revealed that the loss of electricity and fuel consumption of Tiggo 8 PLUS Kunpeng e+ is also good. After all, it also has a generator and has its own "hematopoietic" ability.

However, Kung Fu car is not optimistic that its power loss and fuel consumption will reach the same level as DM-i, because this generator is used for both power generation and driving. Considering the arrangement of its own three engines and four engines, the power generation will not be too large, but the power consumption capacity is quite strong, and the power conservation capacity is naturally not as good as that of DM-i with simpler structure.

In fact, the architecture similar to Tiggo 8 PLUS Kunpeng e+ has already been done before. It has more advantages in performance, relatively insufficient power-saving ability and higher cost. The result proves that the market influence is limited.

(3) Is the competitor of DM-I actually a fuel car?

At present, Tiggo 8 PLUS Kunpeng e+ has not been listed yet, which is actually not suitable compared with DM-i, which has a large number of systems.

Moreover, in Kung Fu car’s view, the biggest rival of DM-i model is actually not other hybrid models, but fuel vehicles.

Because other hybrid models can’t compete with DM-i at all, take the Tiggo 8 PLUS Kunpeng e+ as an example. It has three motors plus an engine, plus a quite sophisticated hybrid special gearbox. The DM-i has only two motors and no gearbox.

Both of them have their own advantages. The performance of DM-i is better due to power loss and fuel consumption, while that of Kun Peng DHT is stronger, but the cost of DM-i is much lower. It can make a hybrid car with a size close to Class B reach 100,000, which is unimaginable for Kun Peng DHT. And the simpler the architecture and the simpler the control logic, the less likely it is to go wrong, which is also common sense.

Furthermore, even if the architecture similar to DM-i can be achieved, it can’t be beaten. After all, in a world dominated by electricity, our advantages are too great. It is one of the largest power battery manufacturers, and also an excellent motor manufacturer. It is also a self-developed control chip, and its core technologies are still at an excellent level. If it is to fight for costs, other manufacturers have nowhere to start.

Therefore, if other hybrid cars want to compete with DM-i, I’m afraid they can only eat some relatively niche markets. For example, I don’t value price and reliability, so I want to speed up for a few seconds. Or the brand blessing is relatively large, and users are more willing to pay a premium. Even if the completion is not as good as DM-i and the price is higher, users are willing to pay the bill, but these are a minority after all. At least for now, DM-i is completely sweeping in the hybrid market.

And if you want to say that the model with the same dimension PK as DM-i is actually a fuel vehicle. After all, the fuel truck has simpler structure and more mature technology. Although the acceleration is not fast enough, smooth enough and quiet enough, many people don’t care so much about it. As for the higher fuel consumption, it can be offset by the difference in car prices.

Therefore, after DM-i came out, it has been promoting the subversive of fuel vehicles. This is its goal, that is, to change people’s car habits and make them pay more attention to driving experience, so as to tilt towards hybrid cars.

The voice of Kunpeng DHT is very high, but now it can’t compete with DM-I. It has its own advantages, for example, the engine has three gears, and dual motors can work with the engine at the same time to achieve stronger performance. However, its structure and control logic are a little too complicated, which is a great test for its working stability and will also push up the cost.

Therefore, the DM-i model with high probability will still be killed. As for Kunpeng DHT, let’s wait for it to be officially listed.