Of course, the delisting of traditional diesel locomotives does not mean their demise, but exists in another form. In June of this year, 5438+ 10, China Automotive Engineering Society released "Technology Roadmap 2.0 for Energy-saving and New Energy Vehicles", which clearly stated that in the future 15, traditional vehicles should be fully mixed. By 2035, the annual sales of energy-saving vehicles and new energy vehicles in China will each account for half, and all passenger cars driven by traditional energy will be converted into hybrid power.
However, the transition to the hybrid market is not easy for our domestic car companies. Although many independent brands have achieved overtaking in corners by taking the lead in electric technology, the development of independent car companies is not smooth because Japanese car companies have always occupied a technical monopoly position in the hybrid field.
However, on June 5438+February 65438+May, Great Wall Motor released its "lemon hybrid DHT" technology for the first time in Baoding Haval Technology Center, which seems to bring an exciting news to domestic car companies, because it represents that our domestic cars finally have their own "hybrid technology".
According to the Great Wall official, this "lemon mixed DHT" is an efficient and high-performance hybrid scheme, covering almost all travel scenarios such as low-speed travel, long-term parking, high-speed/urban loop. It can bring users a travel life with lower fuel consumption, stronger motivation and more comfortable experience.
Its forward-looking and technological advancement can be simply summarized as "1-2-3", that is, hybrid power system, two power architectures and three powertrains.
Multi-mode hybrid power system considering power and fuel consumption
Great Wall said that the "Lemon Hybrid DHT" system is essentially a hybrid technology system based on "seven-in-one" efficient multi-mode hybrid, including1.5l1.5t hybrid special engine, fixed-axis gearbox, GM/TM dual motors, dual-motor controller and integrated DCDC.
First of all, one of its hybrid systems means that "Lemon Hybrid DHT" adopts a dual-motor series-parallel topology and has various working modes such as pure electricity, series connection and energy recovery (similar to Honda i-MMD hybrid system). By intelligent switching of the control system, the balance between high performance and high performance can be achieved in full speed domain and all scenarios.
Its two power architectures are HEV/PHEV, which are designed to meet different consumer needs. Among them, HEV architecture focuses on the ultra-low fuel consumption of urban road conditions and the instantaneous acceleration ability of medium and high-speed road conditions. The comprehensive efficiency of the power system can reach more than 50%, giving full play to the respective advantages of the engine and the motor, and there is neither charging trouble nor mileage anxiety.
It is reported that in the actual test, the comprehensive fuel consumption of A-class SUV powered by HEV can be as low as 4.6L/ 100km, the fuel saving rate of B-class SUV powered by HEV can reach 35-50%, and the acceleration time of 0- 100km/h is greatly shortened by 1.5s, thus achieving a good balance between fuel consumption and power.
PHEV architecture strives to bring consumers a smoother, more lasting and stronger driving experience, which is closer to pure electric vehicles. Therefore, it will be equipped with a larger capacity battery, which can achieve the longest pure electric cruising range of PHEV models in the world, up to 200km.
Three sets of powertrains refer to the powertrains of "1.5L+DHT 100" and "1.5T+DHT 130" under the two architectures of HEV/PHEV; Under the PHEV architecture, there are "1.5T+DHT 130+P4" four-wheel drive powertrains, which respectively correspond to different levels of products and meet users' diversified choices.
Based on this, "lemon hybrid DHT" can serve users with different needs in different regions of the world in the future, and it has a high degree of flexibility to adapt to the globalization strategy of Great Wall Motor.
Three technologies of "saving time, being quick and smooth"
Great Wall Motor said that with the "1-2-3" architecture, lemon hybrid DHT can achieve "fast and quiet" in full speed domain and whole scene. Its core working principle is simply to make the engine work at the highest efficiency point forever, or to maximize the efficiency of the engine, so as to achieve the best overall efficiency.
In EV working mode, TM motor (driving motor) can directly drive the wheels, so that the engine can always be kept in the high efficiency area and give full play to its dynamic performance.
Under urban driving conditions, the series mode will be started, the engine will drive GM (generator) to generate electricity, and the TM motor will directly drive the wheels. In the series hybrid power mode, the fuel saving rate can reach 35%-50%.
The high-speed driving condition is more suitable for parallel mode. The engine directly drives the wheels, and the GM motor and TM motor are responsible for adjusting the working point of the engine and assisting in driving the wheels. This engine direct drive mode falls directly in the high efficiency area, and the fuel consumption can be reduced by 10%- 15% compared with the series mode.
The energy recovery mode will start when the vehicle brakes, and TM motor can directly recover energy, which not only improves the working efficiency of the whole vehicle, increases the cruising range, but also further reduces the fuel consumption, thus better optimizing the energy utilization rate.
In terms of performance, lemon hybrid DHT consists of a hybrid special engine, a dual-motor hybrid gearbox and a 135kW three-in-one dual-speed electric drive rear axle, which constitutes a three-machine/four-wheel drive power system and brings strong power. Among them, HEV two-drive system provides 180kW system power, while PHEV two-drive system has a total power of 240kW.
As for the most powerful PHEV+P4 dual-motor all-drive system, the total power can reach 320kW. The intelligent four-wheel drive system with this architecture has strong climbing ability, such as the maximum climbing degree of 60%-65% when asphalt pavement is dry and 15%- 18% when it is snowy.
In addition, one of the original design intentions of lemon hybrid DHT is to provide a smooth and quiet driving experience similar to electric vehicles. The power battery it uses has the advantages of high energy density and good safety. Among them, HEV architecture uses 1.8kWh battery, which improves the battery capacity by more than 30% compared with the traditional hybrid system.
And the PHEV building is equipped with 45kWh? PHEV battery can charge 80% in 30 minutes. Based on this, users can use pure electric drive in more scenarios, and fully reduce engine start-stop times, reduce start-up energy consumption, and greatly improve NVH performance.
Feel the oil-electricity connection with smooth silk.
On the second day of the conference, we were lucky enough to participate in lemon mixed DHT? Simple test drive experience of "1.5t+DHT130" HEV. Its power system power is 180-240kW, and it is not a mass production version yet.
In the rapid acceleration from 0km/h, when the accelerator pedal is deeply stepped, the system will be in series mode, that is, the engine drives the generator to generate electricity, and the driving motor TM is the main power source. At this time, the response of the accelerator pedal is very linear, which can also bring a strong push-back feeling, but the engine sound wave will not change with the increase of engine speed, and the engine speed is always in the efficient range of about 3000 rpm.
When the vehicle speed increases to 80km/h, the system will switch to parallel mode, that is, the engine and the drive motor work together. At this time, the engine is connected with the "power gear" of the two-stage gear reducer, and the motor outputs at the same time. It is worth mentioning that when this system switches between different modes, the engine intervention will only feel the change of engine sound wave, and the vehicle will not feel frustrated when the clutch is engaged.
As for driving on the high-ring road, lemon hybrid DHT hybrid vehicles will basically use the engine economic direct drive mode to provide power for the vehicle. When there is a power demand, the motor will intervene to provide additional power, forming a parallel drive mode, which will not produce the feeling of "insufficient strength" and further improve the re-acceleration ability in high-speed scenes.
In addition, the biggest feeling of lemon hybrid DHT in driving is the smoothness between power mode switching, especially in the process of high-speed range series to direct drive, which is almost the same as Honda i-MMD hybrid model.
As for why lemon hybrid DHT is so smooth in the process of oil-electricity connection, according to the engineer, although the clutch is used to switch different working modes, there is basically no sliding friction when the clutch is engaged. By adjusting the output of the motor, the acceleration process will not be interrupted and there will be no retrogression when the clutch is disconnected.
Forward-looking layout wants to break Japanese monopoly
The world premiere of lemon hybrid DHT really brought surprises to everyone, and its innovative ability to break through Japanese hybrid technical barriers is really commendable.
In fact, according to Great Wall Motor, as early as two or three years ago, they had already laid out this hybrid technology. As a product independently designed and developed by Great Wall, lemon hybrid DHT has completely independent intellectual property rights, with a total of 199 patents, including 80 core patents. Its official listing has set a new trend for China's hybrid technology, and also vindicated its name as "Created by China".
Soon, lemon hybrid DHT will be applied to the new car built by Great Wall Motor based on lemon platform. It is believed that as a hybrid technology with independent knowledge, lemon hybrid DHT will create more value for the sustainable and healthy development of China's new energy industry, and more importantly, it is hoped that its arrival will provide better self-owned brand car experience for domestic users. (write an article? |? Little devil)
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.