[News-Oxcart Network]
It is said that 2021 is the first year of hybridization of Chinese automobile brands, which is very correct. Because, in this year, we have seen the strong appearance of various hybrid systems of Chinese brands, and each has its own advantages and characteristics.
Prior to this, the hybrid systems that we recognized and recognized as having good quality and efficiency were all from Japanese brands, which were mainly fuel-saving in thinking, but not satisfactory in power and quality.
Nowadays, with the launch of the Chinese brand hybrid system, the mixing ideas of each company are slightly different, but the overall performance in fuel saving, efficiency, quality and other parts has a good performance. Among them, the most recognized by users is BYD DM-i, followed by the Great Wall Lemon DHT, Geely Thor, Changan iDD, SAIC 3.0T Green Surging Power, Kunpeng DHT and so on. Today, let's take stock to understand the principle of each brand's hybrid system.
#比亚迪DM-i
As the most recognized brand with the strongest technical reserves in the field of three electrics in China, the strength of BYD is that it has its own patented technology in many fields, especially in the battery pack part, which can achieve self-production and self-sales, form a virtuous circle, and will not be technically stuck in the neck by outsiders.
BYD DM-i super hybrid as the brand's strongest plug-in mixing system, different from other brand ideas, BYD's DM-i is based on "electricity" technology solutions, using high-power drive motor + large-capacity blade battery combination, which is also because of BYD's advantages in the field of three electricity and battery. After all, compared with other brands, if the battery pack design capacity is too large, but also to take into account the procurement cost factor, obviously BYD does not have this trouble.
The core of BYD's DM-i hybrid system is the EHS super hybrid system, which is composed of a seven-in-one highly integrated motor, a 1.5L/1.5T Snap Cloud dedicated high-efficiency engine, a dedicated high-efficiency blade battery and a vehicle control system, which realizes pure electricity, series, parallel connection, energy recovery and other modes, which can remain efficient in a variety of road conditions.
Pure electric driving when the power is sufficient; the engine generates electricity to drive the vehicle and charge the battery pack when the power is insufficient; when power is needed, the engine and the driving motor work together to drive the vehicle; when high-speed cruising, the engine is in the efficient range, directly driving the vehicle, and at the same time has a stronger driving performance. This is mainly based on the basic operation of this hybrid system with high-power motor + large-capacity blade battery, "mainly electricity". And in terms of bydir's system demonstration diagram, 81% of its working conditions are mainly electric drives, and 18% of the working conditions are mainly efficient series driving, which is a combination that is very suitable for use in cities. If you use a car to run at high speeds or have to drive at high speeds for a long time, it will not open up too much fuel consumption gap with efficient internal combustion engine power.
In order for different models to match different combinations of components, the electromix system is divided into three power versions of EHS132, EHS145, and 3HS160, and the special high-efficiency engine of Xiaoyun is also matched with different mixing systems, and is matched on Qin PLUS New Energy, Song PLUS New Energy and Tang New Energy. The former matches the 1.5L engine, the latter matches the 1.5T engine, and song PLUS new energy is equipped with a hybrid system composed of 1.5L and 1.5T engines according to different configurations. At the same time, the upcoming cruiser 05 will also use a DM-i hybrid system composed of 1.5L power.
In addition, dolphins born on BYD's e-platform 3.0 are equipped with an eight-in-one high-efficiency integrated motor developed by BYD, which is enough to show that BYD's technical reserves in the drive system part are very strong.
#长城柠檬DHT
The core of the lemon DHT hybrid system developed by great wall is to keep the engine in the efficient operating range forever, so as to achieve a double balance between power and fuel consumption. It also adopts a dual-motor hybrid architecture, which solves the power requirements of vehicles under different working conditions and optimizes fuel-saving performance through pure electricity, series, parallel connection, energy recovery and other modes. From here, it can also be seen that it is different from BYD's "electricity-based" thinking.
The general architecture of Lemon DHT is mainly a gasoline-electric hybrid system composed of a seven-in-one high-efficiency integrated motor, which matches the two engines of 1.5L and 1.5T, and forms 3 sets of power combinations to meet the different needs of different models for driving quality. At the same time, it can be clearly seen that the BYD DM-i is only used in the plug-in mixing system models, but the lemon DHT can be perfectly applied to HEV and PHEV models. For this reason, personal speculation, BYD has developed a more efficient eight-in-one highly integrated electric drive system, and is highly integrated with the e-platform 3.0, so that resources are more dispersed and avoid increasing production pressure.
In the working conditions of the hybrid system, the Great Wall also gives a clear explanation, in the pure electric mode, the engine is not directly involved in the drive, and the vehicle is directly driven by the drive motor; 0-35km/h intelligent switching by the ECU pure electric driving or series mode, the engine can participate in the drive, can also directly generate electricity, there is a drive motor directly driving the vehicle; 35-65km/h range, then the use of power direct drive mode, by the engine through the DHT direct drive vehicle, the drive motor can intervene at any time, ECU automatically adjusts the engine working node and auxiliary drive vehicle; above 65km/h using the economic direct drive mode, the engine drives the vehicle through DHT, the drive motor can intervene at any time, and the ECU automatically judges the driver's needs, and adjusts the timing and strength of the engine and drive motor. When it is necessary to drive the vehicle at full load, in the four-wheel drive model, the drive motor of the front axle, the engine and the single motor of the rear drive simultaneously output the strongest power, and the vehicle is in the strongest stage at this time.
At present, lemon DHT is mainly installed in WEY models, Macchiato DHT is equipped with a 1.5L hybrid system, while mocha and latte are equipped with 1.5T hybrid system, of which the mocha PHEV model is more P4 drive motor on the rear axle. Moreover, the lemon DHT system is more advantageous in that it has 2 gears in the transmission part, and compared to the single-speed transmission with fixed gear ratio, the lemon DHT will be more efficient in the full speed range.
#吉利雷神智擎Hi· X
Geely's latest release of Thor's Mind Engine Hi· X (referred to as Raytheon) modular intelligent hybrid platform, also contains DH1.5TD and DH2.0TD engines, as well as DHT 1-speed and DHT Pro 3-speed hybrid special transmissions, can support A0-C models and HEV, PHEV, REEV and other technologies full coverage, can fully meet the matching needs of Geely and Lynk & Co models.
In the hybrid special transmission part, it is divided into DHT and DHT Pro, of which DHT is a single-speed transmission with a fixed speed ratio, while the DHT Pro is 3-speed, and the dual motors, electrical controllers and other components are highly integrated, but the weight is only 120Km, and the maximum torque output reaches 4920N·m, which can adapt to the needs of more models.
At the same time, in the working condition demand mode part, the pure electric mode is driven by the P2 motor alone, and its torque is as high as 320N·m; in the series mode, the engine charges the battery pack through the P1 motor, and the P2 motor is responsible for driving the vehicle; and in the parallel mode, the engine directly drives the vehicle, and the motor provides power support when the power is needed, so that the vehicle has a stronger acceleration performance. Among them, the P1 generator is connected to the engine and has a higher power than the BSG motor, which can take into account the vehicle start-stop and power generation needs.
Compared with BYD DM-i and Lemon DHT hybrid system, which need to be more than 65km/h and 35km/h respectively to enter parallel mode, Thor hybrid system can enter parallel mode when the speed exceeds 20km/h, the most efficient use of engine energy, connected to the 3-speed DHT Pro transmission, can release 60% of energy when overtaking at high speed, and reduce energy loss.
#长安蓝鲸iDD混动系统
It can also be seen from the name that the Changan iDD hybrid system is based on the Blue Whale 1.5T engine and is jointly driven with the motor, no matter what kind of working conditions, it can stabilize the power output of the vehicle system, and the first model equipped with the system is the Changan UNI-K model, and the official will also name the model UIN-K iDD.
The main technical features of The Changan iDD hybrid system are the Blue Whale 1.5T hybrid special engine, the Blue Whale three-clutch electric drive transmission, the large-capacity power battery, and the Blue Whale iDD electronic control system, which can be regarded as a collection of the strengths of the family as a whole. This places higher demands on the layout of the entire electric drive system, as well as on the space of the vehicle.
From the structural point of view, with the Geely Raytheon full-speed domain parallel, BYD DM-i hybrid, lemon DHT hybrid is different, although the Changan iDD hybrid system is also a parallel structure, but it puts the motor between the engine and the clutch, P2 is a tandem structure, the fusion of highly integrated Blue Whale triple-clutch 6-speed hybrid transmission, with a comprehensive transmission efficiency of 90%, and through the integrated P2 motor, it not only solves the power transmission needs under various working conditions, but also solves the durability of the dual-clutch transmission. Deficiencies in stability and setbacks provide a smoother and more powerful driving quality for the vehicle.
From the perspective of the characteristics of the hybrid system, the main purpose of the Changan iDD hybrid system is to have a good fuel consumption performance at the same time, the vehicle driving quality and power explosion will not compromise. But it is precisely because of this concern about the vehicle's power performance and the excellent driving quality brought by the large-capacity battery pack that the vehicle's overall quality has risen, and the average fuel consumption of 5.0L/100km announced by Changan UNI-K iDD is indeed higher than that of other competitors.
#奇瑞鲲鹏DHT超级混动
The Kunpeng DHT hybrid architecture released by Chery here is more special, and it can be seen from the word Kunpeng that it completely takes the performance route. This power system is mainly composed of a 1.5T hybrid special engine + front double motor + rear single motor + Kunpeng hybrid 3-speed transmission. At the same time, the hybrid special engine adopts an inverted layout, making the intake more smooth, the first model equipped with this hybrid system is Tiggo 8 PLUS Kunpeng e+, the official announcement of its 100 km acceleration time of 4.9s, compared to several other brands, in the power and fuel consumption to find a balance point, Chery Kunpeng hybrid system can be described as quite extreme.
From the structural layout and hybrid characteristics, it can be seen that this set of power is completely for performance, but it also takes into account a certain fuel-saving characteristics. The most important of these is the 3-speed hybrid special transmission, which can be fully functional with the drive unit in 9 operating modes and up to 11 combined gears, so that the working conditions can be used more comprehensively.
Although performance is the main demand, among the 3-speed transmissions it is equipped with, the 1-speed ratio is mainly used for starting and accelerating. The 3-speed ratio is set to ensure high-speed driving and reduce fuel consumption and system noise. The second gear mainly takes into account the low-speed driving in the city, balancing fuel consumption with driving comfort quality. This is also the main reason why Chery Kunpeng DHT is able to balance fuel consumption while emphasizing performance so much.
#上汽3.0T green surging power
For the 3.0T green surging power released by SAIC, you may be unfamiliar with it. SAIC 3.0T green surging power has now come to the second generation, consisting of a 1.5T direct injection efficient engine + high-efficiency permanent magnet synchronous drive motor, and the world's first 10-speed second-generation EDU intelligent electric drive transmission, making this plug-in and mixing system achieve a power output of 3.0T, but has a fuel consumption performance of 0.3L power.
summary:
After reading these complicated hybrid technologies, are you also more messy, you may also want to say that the same Chinese brand, each in the technical unity, the choice of a most efficient hybrid structure is not good, this is very unrealistic. Car companies spend huge amounts of resources to develop their own hybrid systems, on the one hand, do not touch the patents of others, and secondly, decide according to their own resources. For example, BYD's DM-I, because of its own experience accumulation in the three-electric system part, has a seven-in-one highly integrated front-drive system, and itself has blade battery manufacturing technology, so the large-capacity battery pack is on the body, which is also the main reason why bydir's hybrid system is "electricity-based".
But in the end, the purpose of each brand is very simple, that is, to achieve the purpose of fuel saving while having good power. After all, with double integration, carbon neutrality, and lower fuel consumption restrictions, hybrid is the most mainstream choice at present. Especially after the Shuangtian hybrid model has been put on the market for many years, consumer acceptance will be higher.
In addition, with the release of hybrid technology of various brands in China and the landing of models equipped with hybrid systems, the comprehensive cruising range of most products has exceeded 1,000 kilometers, and for users who cannot accept the endurance anxiety of pure electric models, the advantages of hybrid models are significantly greater and more acceptable.