Introduction | The rule of the two fields is to end?
Recently, there is a containendal coverage of BYD DM-I mixing system.
It is also to redefine the engine, but also adopt a comprehensive world first motor, which is the first to accelerate the world, but also the world’s first low fuel consumption. Many people tease, how do you feel that BYD has invented the engine?
To tell the truth, many descriptions are really too exaggerated. The self-owned brand has a breakthrough, and the car is also happy as everyone.
However, the development of any technique is not one. After the public opinion of the DM-I system, the car gathers also came to try to do technical interpretation, discuss what is the launch of the DM-I mixing system of the DM-I mixed system? What highlights and possible slots? Let’s talk with the car together. 
First, the electric drive is mainly, similar to Honda I-MMD
The hybrid car is not a rare thing, from the 1997 Fengtian launched the first generation The model TOYOTA PRIUS starts, whether it is European Motor, US Auto Company, or a self-owned brand, has done some mixed programs. Then I got a “conclusion”: there are two mixes in the world, one is Toyota mixed, one is other mixed. This sentence has two levels of meaning, and it is a unique way to say that Toyota’s mixed route is from completion. As a “open hill ancestor”, THS is really good.
Toyota THS’s English full name is Toyota H Ybrid System, which is Toyota Mix System. Its working principle is actually not complicated, which is to hand over the working section of the traditional internal combustion engine, to the motor to work. For example, the vehicle starts, idle, when walking, these working conditions, let the motor intervene.
According to early information, the THS system divides the vehicle from the entire process of the parking to the parking, and then combines the E-CVT planetary gear power distribution, determines the engine in each operating mode.And the intervention of the motor. Therefore, it is simple, but practical is very complicated.
This also directly leads that this system is difficult to mimic. On the one hand, it is difficult to get around Toyota. On the one hand, you want to do better than Toyota. After all, this super fine structure and controller don’t have a few levels that can do Toyota. 
Honda’s mixing is not too late, almost in the same period of the first generation of Prius, Honda launched the first generation IMA mixing system. Also, like Toyota THS, the engine is mainly, the motor is a secondary architecture. Then Honda did more than ten years, whether it is sales or reputation, and the worse the mixed model of Toyota. That is, in this period, a Toyota appeared in this period, one is other statement. Honda himself also realized that there is no way out along this road.
In 2013, the Accords of the first generation I-MMD system were listed in the United States. It uses a new hybrid concept, that is, the motor is main, the engine is a supplement, and the purpose of saving oil is achieved by multi-purpose electricity. This sounds a bit touched, but it is very reasonable to analyze it.
Since the mixed core is try to make the engine efficiently, then I simply only make it run efficiently. Either a high-speed cruise direct drive, high speed is high enough to save oil; or it is responsible for power generation during the middle and low speed, then the large motor drives the vehicle to run, only power generation, it is also effective enough. 
Therefore, although the energy of the hybrid system is still from boiling oil, because the engine is only operating in an efficient interval, it has indirectly realizes the effect of savings.
Taking Jacar Rui Mix as an example, according to the statistics of more than 1,000 owners according to the bear fuel consumption, its actual average fuel consumption is 5.4L / 100km, and the Camry Supoto is just flat.
To know that Accord Rui is equipped with a large motor, but the power than the Camry Double Engine is more powerful. From this perspective, Honda I-MMD is a corner overtaking. Especially in recent years, the sales of Honda mixed models have greatly improved, which can be said to be Toyota, one is other, no longer applicable.
BYD’s DM-I system, in principle, in principle, the Honda I-MMD system is similar, both of which are mainly, and the engine is an architecture. Moreover, the working mode is also similar, divided into pure electric mode, HEV series mode, direct drive mode, and HEV parallel mode. In addition to pure electric travel and engine high-speed cruise direct drive, the remaining most of the time is the engine power generation drive vehicle operation. In the case of ultra-high speed and acceleration, the motor and the engine are driven in parallel.
But some extent, DM-I is more “absolute”.
First it is equipped with a larger battery. Taking Qin Plus as an example, even the version of the pure electricity is 55km, the battery capacity has reached 8.32kWh, the Ling Rui Rui Raise of Honda, the battery capacity is around 1.2kWh. This allows it to achieve greater driving force, and the two versions of Qin Plus are 132kW and 145kW, respectively, even the version of life of 55km, and the motor power is also comparable to Jacar Protection. As a system-based system, this also means that the power reserve of Qin Plus is the level of Accord.
Of course, it is certainly possible to increase its pure electricity, according to the data released by BYD, under the NEDC operating conditions, the motor drive of the DM-I mixing system accounts for up to 88%, in the urban area There are 99 percentage working conditions to drive with motor, which is higher than the I-MMD system.
Implementation of oil, and the idea of Honda I-MMD is similar through multi-purpose electricity. From the data published by BYD, it is at least feasible.
Second, the pain point may exist in the DM-I system 
Only from the technical architecture, there seems to be no big problem. DM-I is the same as I-MMD, and there is no traditional transmission, but an E-CVT power shunt device is used, the structure is simplified. Its working model is also very simple, the control is not too complicated, but there are still some points to pay attention.
The first is its power source, the official promotes “feed” fuel consumption 3.8L / 100km, must be builtOn the basis of high efficiency engines. BYD also specifically designed two dedicated engines for the characteristics of the hybrid system. The efficiency of 1.5L naturallytic engine has reached 43.04 percentage (official publicity data).
In order to achieve super high efficiency, BYD mainly did the following actions. The air conditioner, vacuum pump is first modified to power driver, which is benefited from its large battery and large motor, and some extent is to reduce the burner to the engine, and it is indeed a positive impact on improving efficiency.
The second is the use of Atkinson cycles as the two antifersey engines, that is, in the engine operation, let the intake doors are closed at a point, so that the combustible mixture in the cylinder will have partial pressure. Back to the trachea, then make the engine work stroke greater than the compression stroke. Although this action has caused engine performance, it does effectively improve combustion efficiency.
The third is a super high compression ratio of 15.5. Everyone knows that it is one of the most effective ways to improve the compression ratio. The higher the compression ratio, the more sufficient gasoline molecules and air in the mixed gas during compression, the better the septum in the cylinder, the higher the combustion efficiency. However, the higher compression ratio means that the more intense the knocks, the higher the material requirements in the cylinder. Therefore, the improvement of modern engine compression is basically progressive.
BYD has a compression ratio to the compression ratio, which will cause much impact on the reliability of the engine, and is unknown. The requirements for oil will not be higher, such as whether 95 # and above gasoline is needed, and the official has always intended to ignore this.
The second is a power battery, whether it is Toyota or Honda hybrid system, which is relatively small for the power battery, and is shallow-powered, diligent Charging battery control strategy.
Toyota’s power battery reserves are 60%, Honda is 55%, that is, lower than this electricity, the battery stops discharge. Everyone uses smartphones, you should know that this is very friendly for the use of lithium batteries. Shallow charge is light, it is easier to extend the life of the battery. Therefore, the mixed car of the two fields has almost no troubles of battery problems. First, the battery itself is small, low costThe manufacturer also provides a long warranty, and the other is to do it is more friendly, the battery life is longer.
Another is the winter life, the DM-I system still uses the blade battery, essence or lithium iron phosphate battery, and winter life will definitely make a fold. That is to say, the pure battery is 55km, and after subtracting the reserved amount, discount, the user must be mentally prepared.
The third is that publicity is publicized, and the actual is actually actually. About five or six years ago, BYD’s Tianki promoted the “542”, 5 represents 100 kilometers to accelerate 5 seconds, 4 generations of electric four-drive, 2 represents 100 kilometers fuel consumption 2L, these are unique. In a particular state, BYD has indeed made it.
But the real car experience can only be seen, at least in recent years, BYD’s sales will not be retracted, and the gap between several autonomous brand first-line cars is getting bigger. What is the strength of the DM-I system, still relying more user verification, now more publicity is mainly. Now there is a 3.8L / 100km, which can be exchanged, how much can be credited, in what state is fulfilled, everyone must be mentally prepared.
Third, break into the land, the geometry of the competitiveness?
Self-branded technology accumulation is generally generally in the field of internal combustion engine, directly leading to the upper layer constantly pushing new energy vehicles, BYD is one of the earlier beneficiaries, and has eaten a lot of subsidies. However, the result is not a beautiful, the domestic new energy industry really begins to develop, exactly the introduction of “Tesla” squid begins.
In the field of mixing, a large number of PHEV models, essentially only provides a “send” green channel. The reason is very simple, increase the battery to take up the space, it will increase cost. For the user, if there is a charging condition, it needs to be green, it is more willing to choose a pure tram type.If there is no charging condition, most of the Phev model is a fuel car with a battery, which is basically no advantage. It is also the route that includes previous BYD.
So this market is indeed not large, in 2020, BYD is still the highest domestic PHEV model. However, only the DM DM has averaged 20,000 throughout the year, and only the DM a car exceeded 10,000 sales.
The two fields are truly mixed products, although there is no subsidy, Honda’s mixed models, sales in 2020 reached 201,499, more than the entire PHEV market.
Therefore, the slogan hit by the BYD DM-I system is to do “fuel stroller” because it is clearly based on the PHEV market, in fact, there is no significant meaning.
At pricing, BYD quietly played some “obvenced”. In the initial propaganda, BYD claims that the DM-I model is less than 20,000 fuel models than ordinary versions, and the first vehicle will be based on Qin. Even according to Qin Pro, it is expected that the entry price will be less than 100,000. However, BYD launched a new Qin PLUS. The entry price is set to 107,800 yuan. The price of critical low-match reached 123,800 yuan. According to BYD, it is very likely that it is not produced, or quantity Little. 
As a model that completely has no verification, it is a new system, and the price is not low. And there is such a high heat together, actually a bit abnormal.
After “changing the world” a year, the terminal sales of BYD car in 2020 were 4,16333, ranked # 7 in their own brand. If Roewe and MG are alone, it should be ranked 8th. But the stock price has indeed risingMany, this is benefited from BYD to throw a lot of new concepts. But the final completion is, everyone is still the product.
No matter how to say, the DM-I system is launched, at least in mind that BYD is trying to do a mixed car, rather than being “drawn” in the subsidy as before. This also makes it a third behind the two, providing a car company that compares the need for a mixed vehicle.
Just like a bull breaks into the porcelain shop, the two-field operation has been shaken for many years. It is the actual performance of the BYD DM-I system.