[EV Vision Report]As a hybrid technology that is about to gain momentum in the new energy vehicle market, a series of excellent proprietary brand technologies have emerged in the domestic market that has broken the Japanese monopoly. Among them, the Great Wall Lemon Hybrid DHT can be regarded as a cutting-edge technology close to the “net celebrity”. But now it seems that not many people really understand it, so a close to the actual test experience is very necessary.
On April 15th, Great Wall Motor conducted an online real-life test of the Lemon Hybrid DHT, and this was the first time it was tested on a real car. The tested model was the WEY Macchiato that will be unveiled at the Shanghai Auto Show. However, if you think that this is just a test for the purpose of saving fuel, you are quite wrong. In fact, the biggest advantage of the lemon hybrid DHT covers four words: “fast, smooth, quiet, and province”. There is a corresponding technical paving behind each word. So can actual driving really be done? here we come to find out. What is the sense of pushing back under the word “fast”? In the acceleration test representing the word “fast”, the experience of sitting in the co-pilot, I love placing a balloon between the back and the seat. When the test-driving car is cruising steadily, the balloon stays still, and when the test-driving car accelerates rapidly, the balloon is instantly squeezed. This is due to the strong “back force”, which shows the acceleration performance of the lemon hybrid DHT. It’s outstanding. The Lemon Hybrid DHT consists of a high-efficiency hybrid dedicated engine, a highly integrated dual-motor hybrid gearbox, and a 135kW three-in-one two-speed electric drive rear axle, forming a powerful three-engine/four-engine power system, bringing super power. The HEV two-wheel drive system has a maximum power of 180kW, and the PHEV two-wheel drive system has a total power of 240kW, which is superior to the same level. The PHEV+P4 structure front and rear axle motors can output power at the same time, and the maximum total system power can reach 320kW. The intelligent four-wheel drive system of this architecture has a strong climbing ability, such as 60%-65% maximum climbing degree when dry asphalt pavement, and 15%-18% maximum climbing degree when in snow. Huang Zhenyang, head of the development of Lemon Hybrid DHT, introduced in detail: “In the initial stage, electric drive is used. Compared with the engine, the motor can release the maximum torque at the moment of starting. There is no traditional gearbox and the transmission efficiency is very high. Therefore, the vehicle responds. It is very fast and has a strong sense of pushing back. When it comes to medium and high speed road conditions, the system adopts engine direct drive. If a power request is received, it can achieve an effect similar to a downshift of a fuel vehicle. Not only does it switch from economic gear to power gear, but also Motors can participate in the output and form a parallel mode, so that the acceleration ability can be improved to a higher level.” How do you feel about driving and riding under the word “Shun”? In the test representing the word “Shun”, two cups were placed on the sunroof of the test-driving car and filled with a certain amount of juice. A series of operations such as starting, accelerating, decelerating, etc. of the test-driving car in the field will involve switching between oil and electricity and energy recovery. Observe whether the water cup will fall and the shaking of the juice. Through the real-time video captured by the GoPro on the roof of the car, it can be seen that the juice in the water glass does not even shake significantly, and it is very stable. When the final test is completed, the water glass is still in its original position. Experiencers said that its ride comfort is comparable to that of high-speed trains, and there is no feeling of frustration, turbulence, or drag while sitting in the car. If you do not watch the energy flow of the central control screen, you can hardly feel the switch between gasoline and electricity. Huang Zhenyang said, “The reason why the lemon hybrid DHT is excellent in terms of ride comfort is that it has a set of modes and energy management and torque control strategies with completely independent intellectual property rights, including intelligent switching between series and direct drive modes, and shifting without power interruption. , Intelligent clutch control, motor torque compensation matching and IGBT junction temperature estimation, etc.”. And because of this, the test drive can be “silky smooth” in the process of acceleration, fuel-electricity switching, and energy recovery. Not only does the water glass not fall, but more importantly, it improves the comfort of the drivers and passengers in the car. From a technical point of view, the current hybrid market has several hybrid strategy products such as power split (motor speed regulation, speed coupling), single-speed hybrid (rigid coupling), series range extension, and oil-electric split. Lemon hybrid DHT It is a two-speed hybrid. Among them, the first three representative products all emphasize the economic performance of the system, but the power split and single-speed hybrid strategy are insufficient in dynamics. The power performance of the series-extended range depends entirely on the motor power. The lemon hybrid DHT has more direct-drive gears and more complex control strategies, both in terms of performance and economy. Therefore, a balance between performance and efficiency is formed. The power split hybrid is biased toward engine-driven vehicles, and the electric motor is more assisted, assisted during acceleration, assisted during starting, and so on. Single-speed hybrid is a hybrid system that is close to a pure electric drive mode, so it is closer to an upgraded range-extended hybrid system. The lemon hybrid DHT combines the advantages of pure electricity and hybrid through a complex control strategy, so that the system will always remain in the high efficiency range under the premise of smooth and strong. Two worlds inside and outside the car under the word “Jing”? In the NVH test which represents the word “quiet”, a speaker is placed in the test drive site, music is played on the spot, a noisy environment is simulated, and environmental data is recorded with a decibel meter. The test-driving car made a circle around the audio, and at the same time, the data in the car was recorded with a decibel meter. In the case of more than 90dB outside the car, the members in the car talk and communicate normally and keep floating in the range of 50-70dB. The overall performance is excellent, which can create a pure electric driving experience for users. The experiencer said, “There are some hybrid models that shake significantly when the engine is started, and there are obvious noises when the motor is working. But today’s experience left a deep impression on me. The above situation is hardly noticeable. The NVH optimized Very in place.” It is understood that for NVH, the hybrid dedicated 1.5L/1.5T engine used in the Lemon Hybrid DHT has been re-optimized for its overall NVH, including jitter, noise, etc., to minimize it, combined with the high-end sound insulation of the vehicle itself. Materials and other technologies to improve NVH greatly reduce the noise introduced into the car. Specifically, the HEV architecture uses a 1.8kWh battery, which increases the battery capacity by more than 30% compared to the traditional hybrid system. The PHEV architecture is equipped with the world’s largest PHEV battery with a power of 45kWh, which can be charged 80% in 30 minutes, and it also provides an 8-year/150,000 km long warranty. Based on this, users can use pure electric drive in more scenarios, and can also fully reduce the number of engine starts and stops, reduce startup energy consumption, and greatly improve NVH performance. What’s more worth mentioning is that by further optimizing the connection between oil and electricity, it is guaranteed to be more “insensitive” during power switching, bringing ultimate comfort. How about the actual measurement results of fuel consumption under the word “province”? In the last fuel consumption test representing the word “province”, the mileage and fuel consumption data of the test-driving car were reset to zero, and it was in a power feeding state. The 5km actual test was carried out on the test site, including starting, accelerating, braking, turning, etc. The average speed is 15km/h, and the final apparent fuel consumption is 5.1L/100km. In-car experiencers said, “The average speed is 15km/h. Such a scenario is the weakness of fuel vehicles, and the fuel consumption of 5.1L/100km is an unattainable figure. Thanks to the blessing of the hybrid, the Lemon Hybrid DHT has achieved it. This kind of performance is remarkable, and it has obvious advantages compared with the fuel consumption of 8-9L per hundred kilometers of many similar fuel products. Specifically, the Lemon Hybrid DHT is equipped with a high-efficiency hybrid dedicated engine and TM (drive motor)/GM (generator) dual motors. The overall efficiency of the power system exceeds 50%, bringing optimal economy in the full speed range and all scenarios. , And carry out flexible power distribution for different roads. Its core working principle is to always make the engine work at the highest efficiency point, or to maximize the efficiency of the engine, so as to achieve the best overall efficiency. The working mode of “Lemon Hybrid DHT” is divided into the following points: EV mode energy flow In the EV working mode, the TM motor can directly drive the wheels, keeping the engine in the high efficiency area at all times, and maximizing the power performance. Series mode energy flow The series mode is suitable for urban driving conditions. The engine drives the GM to generate electricity, and the TM motor directly drives the wheels. In the series hybrid mode, the fuel saving rate can reach 35%-50%. Parallel mode energy flow High-speed driving conditions are more suitable for parallel mode. It is driven by the engine to directly drive the wheels. The GM motor and TM motor are responsible for adjusting the engine operating point and auxiliary driving the wheels. This direct drive operating point of the engine directly falls in the high-efficiency area, and the fuel consumption is lower. The series mode can be reduced by 10%~15%. “In low-speed road conditions, the pure electric or series mode is used to directly drive the wheels through the motor to avoid the problem of low engine efficiency. At medium and high-speed road conditions, switch to engine direct drive, which can save 10% compared to the series mode- 15%.” Huang Zhenyang said: “And the direct drive of the engine has economic gear and power gear. The economic gear is used in steady-state cruise. The power gear is switched when accelerating, and the output is assisted by the motor to avoid the transient load of the engine. The perfect balance between power and fuel consumption.” to sum up: Through the above test, we can see that the lemon hybrid DHT technology has perfectly combined comfortable driving experience with strong power output, bringing users the most perfect driving experience in a variety of scenarios. However, from a deeper perspective, the lemon hybrid DHT is a brand new hybrid technology that Great Wall Motors breaks the technology monopoly of joint venture brands and is completely independent of design, research and development, and has completely independent intellectual property rights. It also represents Great Wall Motors’ compliance with the national low-carbon environmental protection strategy and entry into the hybrid technology. The determination and strength of the market. It is believed that with its excellent technical standards, Great Wall Motors Lemon Hybrid DHT will surely become a leader in the hybrid market and contribute an indelible important force to the development of China’s hybrid technology. As the Shanghai Auto Show is about to open, users can also taste the first WEY Macchiato equipped with the lemon hybrid DHT hybrid technology at close range, and further experience the outstanding charm of the lemon hybrid DHT.
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