The original automotive industry has become an irreversible trend in the direction of new energy, and major traditional car companies have also begun to put their energy into this market. Under the strong promotion of China's independent brands in the country, it can be described as a high-flying progress in the new energy market, and it also has a unique advantage compared with overseas brands with large size and slow transformation.
At present, when it comes to new energy models, most friends must first think of "new forces" such as Tesla and Weilai, but due to the constraints of battery materials and charging efficiency, the endurance anxiety problem of pure electric models is difficult to solve in a short period of time. For most families, a model that needs to act as a generalist naturally cannot be a small short leg that does not run far, so the hybrid model is the first choice for most new energy model consumers at present.
Today, we will talk about the iDD (intelligent Dual Drive global intelligent oil-electric dual-drive system) hybrid system launched by Changan, which is the vanguard of its own brand.
In the face of today's dazzling array of new energy models, many consumers are often confused by complicated technical terms when purchasing. There is a more intuitive classification of this in the industry, from the engine to the wheel, the hybrid configuration is divided into P0 ~ P5 according to the different positions of the motor, the closer to the engine, the smaller the number. At present, the hybrid technology involved in the new energy models of independent brands is adopted from P0-P4.
Changan Blue Whale iDD hybrid system is simply to arrange the motor between the engine and the gearbox P2 hybrid architecture, most Of the current European brands such as Volkswagen, Audi are using this structure.
The advantages of the P2 architecture are: 1. The structure is relatively simple, and there is no need to modify the traditional gearbox; 2. The lower cost makes it more acceptable to consumers; 3. The overall quality of the system is light and the vehicle load is small.
The difficulty of the P2 architecture is how to complete the layout and installation of the P2 electric drive transmission without sacrificing system power and efficiency, so that users can obtain a stable driving experience and fuel consumption performance in various scenarios.
As a medium-sized SUV weighing nearly 2 tons, the UNI-K iDD has a pure electric endurance of 130 kilometers and a comprehensive endurance of 1,100 kilometers; the comprehensive fuel consumption of NEDC is 0.8L/100km, and the fuel consumption of the power is only 5L/100km. What black technology does it use? Let's take a closer look.
Black Technology One: Blue Whale NE 1.5T Hybrid Special Engine
As a Miller cycle engine, the Blue Whale NE1.5T hybrid special engine has a maximum net power of 122kW and a maximum net torque of 255Nm, ensuring a double balance between power and economy.
Blue Whale NE1.5T hybrid special engine adopts industry-leading technologies such as blue whale engine efficient agile combustion system and intelligent lubrication system, inheriting the excellent genes of blue whale engine efficiency and strength. On this basis, with the further use of Miller cycle technology, the expansion stroke of the piston is greater than the compression stroke, and a higher compression ratio is obtained to improve the combustion efficiency.
In addition, as a hybrid special engine, the Blue Whale NE1.5T adopts an electrified front-end wheel train, the electrification control of compressors, water pumps, oil pumps and other accessories, which greatly reduces the overall accessory loss, and the engine can provide drive output more comfortably and attentively.
Black Technology Two: Blue Whale Triple Clutch Electric Drive Transmission
For the transverse platform of the engine, the P2 architecture requires a high axial dimensions of the motor. And the motor is sandwiched between the engine, clutch, and transmission, which are "big heat users", and the working environment can be described as harsh. If these problems cannot be solved, the owner may hit the temperature wall due to the motor, and the power system has to limit the output, affecting the power experience, and even causing the motor life to decay.
The Changan Blue Whale iDD hybrid system uses S-winding technology to obtain a better plot ratio and reduce the axial length of the stator, which ensures higher power under limited volume constraints and increases power density. In order to solve the working temperature of the motor, the engineer separates the stator of the motor from the rotor cooling, the stator is cooled with water, and the rotor is cooled with oil. The motor controller also uses double-sided cooling IGBTs, which also provides a strong guarantee for further improving the power density of the motor.
The transmission shift, cooling and lubrication require the support of the hydraulic system, as the first model in China to adopt intelligent electronic double pump, UNI-K iDD will increase the pressure of the hydraulic module to 60Bar, higher pressure shortens the response time of the gear change, while reducing the risk of oil leakage. Compared with the mechanical pumps that are still used in the mainstream of the industry, the intelligent electronic dual pump does not rely on the engine belt drive, so there is no additional loss of mechanical energy output by the engine. The intelligent electronic double pump can be independently started or shut down under the command of the electronic control system, saving 70% of energy consumption compared to the mechanical pump. In the end, the UNI-K iDD's zero-hundred acceleration score can be achieved by 8.1 seconds, and there is another number, that is, the UNI-K iDD's extreme speed reaches 200km/h, which is beyond the current level of competing models.
Black Technology Three: Blue Whale iDD Electronic Control System
In terms of electronic control system, the Blue Whale iDD intelligent control system adopts A-ECMS global dynamic energy management algorithm, which can effectively use these working modes in combination with the user's vehicle conditions (such as traffic jam, high-speed driving, overtaking, etc.) to ensure that the engine, electric drive transmission and battery work in the optimal efficiency range. It not only ensures the efficiency of the system, but also can extend the life of the system.
NeDC's comprehensive fuel consumption is 0.8L/100km, and the fuel consumption of KAPP is 5L/100km, so the excellent results are derived from this.
Black Technology Four: Large-capacity power battery
Unlike other brands that want to fill the entire chassis gap with a special-shaped battery, the UNI-K iDD tiles the battery pack on the chassis. Based on the design of large-capacity battery packs, Changan does not hesitate to use the development ideas and safety standards of BEV batteries to require a PHEV power battery. While the battery dustproof and waterproof rating of most BEVs is only IP67, the UNI-K iDD as a PHEV model has a dustproof and waterproof rating of UP TO68.
IP67 only requires short-term immersion safety, while IP68 requires long-term continuous immersion safety. In the unfortunate event of thermal runaway, the UNI-K iDD battery pack can also guarantee that there is no open flame for 30 minutes, leaving enough time for the driver and occupants to escape, compared with the international requirement of 5 minutes.
In order to better meet the charging needs of users in multiple scenarios, UNI-K iDD directly comes standard with 6.6kW AC fast charging and DC fast charging, and can also support the function of 220V home charging. To know this level of PHEV products, either do not support DC fast charging, or 6.6kW AC fast charging needs to be optional.
Editor's Comments:
At present, the hybrid technology route adopted by major independent brands does not have advantages or disadvantages, after all, for most consumers, the experience effect that these complex technologies finally present is what they care about most. The answer given by Changan Blue Whale iDD is: no matter whether it is a long-distance or short-distance, all kinds of driving scenarios can be easily coped with; no matter whether it is full of electricity, it can show consistent performance; regardless of whether it uses oil or electricity, it can give excellent energy consumption performance.