Now you have to ask me, which is the hottest new energy vehicle in China at present? There is no doubt that the new car-making forces represented by "Te Wei Li Peng" have always occupied the majority of the Internet topic.
However, traffic can't directly turn into sales. Consumers end up voting with their handbooks. BYD is now the sales king of domestic new energy vehicle brands.
In the past February, BYD's new energy vehicle sales reached 87,473 units, still maintaining the momentum of "one dozen and ten" sales. The just-listed Song MAX DM-i, Han DM-i and Han DM-p have also won a lot of orders. This is a concentrated outbreak of BYD's new energy technology accumulation in the past decade, including plug-in hybrid DM and pure electric EV.
So how did BYD's DM plug-in hybrid technology come to be, and how did they achieve such a large scale that it can even match the two-field hybrid?
BYD launched its first DM hybrid model, the F3DM, in 2009. DM means "dual-mode hybrid", which means that it has two drive modes, series and parallel, and uses a computer-controlled clutch to achieve the switching of series parallel mode. This structure even predates the familiar Honda i-MMD (now known as e:HEV). The only hybrid system of the same era that also uses dual motors in series parallel is Toyota's THS.
Although the system is very advanced and very fuel-efficient, its cost is too high. F3DM was priced at 149,800 yuan at the time, although it did not look expensive, but you think about it, this car in addition to the power system, everything else is exactly the same as THE BYD F3, but the price is nearly double that of the F3, almost the same price as the Corolla at that time. For independent brands that were still in the imitation stage at that time, such a price was obviously more difficult to accept.
Moreover, the popularity of charging facilities at that time was not as widespread as it is now, and the large batteries of plug-in hybrid models could not play their due role. And hybrids were also new at that time, and the market acceptance was generally not high. Among the more popular hybrid models at that time, the six generations of Camry (XV40) Hybrid, Prius, and Honda Yinsett generally asked for more than 300,000 yuan.
Therefore, it is reasonable that the sales of F3DM at that time were not as good as ideal.
But the situation has gradually changed in recent years.
On the one hand, with the cost reduction brought about by the popularization of hybrid technology, the non-plug-in strong hybrid technology represented by Honda and Toyota has gradually become popular in household cars, and models such as Corolla/Ralink dual engine, Camry dual engine, and Accord Rui hybrid are performing better and better in the market.
On the other hand, the state began to vigorously support new energy technologies, including plug-in hybrids, and battery costs have been reduced, while BYD has not obtained much eye-catching market performance in F3DM, but has also accumulated a lot of research and development experience in plug-in hybrid vehicles.
But BYD's weakness lies in the engine, like Honda and Toyota have their own developed engines, specifically matching their own hybrid system, but BYD does not have such an engine, which also indirectly leads to F3DM's power loss fuel consumption is not as good as Japanese competitors.
Since it is more economical than that, BYD has chosen another way, using high-power turbocharged engines and high-power motors to create a hybrid system based on the fuel powertrain, which is the "542" technology, which is also the old generation of DM-p.
The goal of 542 Technology is to accelerate 100 kilometers by 5 seconds, full-time electric four-wheel drive, and consume 2 liters of fuel per 100 kilometers. This power system uses the three-motor structure of P0+P3+P4, which is a 48V light hybrid motor, a front-axle motor and a rear-axle motor, but retains the fuel vehicle powertrain of pure fuel engine + dual-clutch transmission as a whole.
The advantage of multi-motor simultaneous power is naturally the terrifying acceleration ability in the fully charged state, and the Qin series DM and Tang DM equipped with 542 technology can achieve the top acceleration performance of the same level. In order to promote its own power system, a car company once held an acceleration comparison competition, which turned out to be a carnival for BYD car owners.
But the shortcomings of 542 technology are also obvious, that is, "there is electricity is a dragon, and no electricity is a worm." Battery power loss will not only lead to a great reduction in vehicle acceleration performance, coupled with the bydir dual-clutch transmission at that time, the adjustment power of BYD's dual-clutch transmission is not as good as that of the German opponent, and the performance of smoothness, noise, fuel consumption and other aspects will also be greatly reduced.
So at this time, BYD had to use the 48V motor to pull back the engine to adjust the speed of the engine when changing gears and reduce the setbacks, but then the advantages of the 48V motor could not be played.
542 technology in the era of cheaper oil prices, can indeed be a highlight of BYD's publicity. However, with the development of the times and policy changes, the market performance of the plug-and-mix system, which focuses on performance, has begun to decline. At this time, BYD picked up the first generation of DM system it had mass-produced, retained its basic working logic, and slightly changed its structure, and DM-i was born.
Compared with the first generation of DM system, DM-i's two motors changed from coaxial arrangement to heteroaxial arrangement, while adding a reduction gear, it is easier to let the motor enter the efficient working range, and the flat line motor and oil injection cooling technology have also greatly improved the efficiency of DM-i.
But the soul of an efficient hybrid system is a highly efficient engine and an intelligent power control system (PCU). PCU is not difficult for BYD, a software engineering man, but BYD has always been not good at developing engines, especially efficient engines, how to solve this problem?
BYD thought of finding foreign aid, they found the world's leading engine combustion model designer AVL, and cooperated in the development of the combustion model of the Snap Cloud engine.
For an engine, the air flow in the engine combustion chamber and the mixing of oil and gas are very complex. But this is crucial for engine efficiency improvement, which is related to whether gasoline can burn completely, and whether the energy released by each drop of oil can be converted into the power to drive the car.
AVL's combustion model for snap cloud engines increases the engine geometry compression ratio to 15.5 while significantly reducing the resistance of the rolling current in the cylinder through the recessed design of the piston top, thus allowing the oil and gas to mix more fully. ACCORDING TOD's official data, the new combustion model, combined with the Atkinson cycle, directly increased the thermal efficiency of the engine by 2%. To know that the current thermal efficiency of the internal combustion engine increased by 1% can be used as an important academic research result, and the thermal efficiency of 2% can be imagined. So 43% thermal efficiency is really not blown.
In addition, BYD DM-i also has a unique skill - blade battery. It is safer than ternary lithium batteries, energy density is also much higher than nickel-metal hydride batteries, the price is relatively low, and equipped with a rare fast-charging socket of plug-in hybrid models can be said to integrate performance, safety and cost advantages, and the practicality is also much higher in today's fast-charging piles.
So DM-p should also keep pace with the times, abandoning the old 2.0T engine and the double-clutch transmission that has stumbled into a dog, and the decoupling of the motor and engine in the EHS electromix system makes DM-p have a very good acceleration feeling whether it is full or lost. It's just that dm-p is DM-p when the power is full, and DM-p becomes DM-i when the power is lost. The 1.5T Snap Cloud engine also has a maximum thermal efficiency of 40.98%, which can be combined with power, smoothness and economy.
The new Han DM series is now on pre-sale. The DM-i series is priced between 216,800-29.28 million yuan, and the DM-p goes directly to 322,800 yuan. Compared with the DM-i 242km flagship, DM-p mainly has a rear axle motor with a maximum power of 200kW and a maximum torque of 350Nm, and a Set of DiSus-C active suspension system, which is priced at 30,000 yuan. DiSus system is a new generation of intelligent suspension system independently developed by BYD, which currently includes DiSus-A, DiSus-C and DiSus-P, and develops air suspension, continuously adjustable damping damping shock absorber and full active oil and gas suspension respectively, with the goal of achieving full model coverage of intelligent suspension system.
The 3.7-second zero-hundred-speed performance is really attractive, but that kind of result can only be done when it is fully charged. After that you can only drive a four-wheel drive DM-i. However, the traction of the smart electric four-wheel drive is still much better than that of the single front drive, and as for the new active suspension system, I think I have to try it before I can make a decision.
So DM-i can really buy brainlessly, and the new DM-p will be recommended to everyone after I tried it. As for the old DM-p, the 542 technology car, who wants to live with their wallet?