Plug-in hybrid+four-wheel drive, Haval Xiaolong MAX needs energy saving and performance.

Fenghuang net automobile preemptive test drive Xiaolong, Raptor+Beast, a domineering name. On March 27th, the brand-new dragon sequence of Haval New Energy was released, and the sales network was named "Haval Dragon Network". Two new energy SUVs were named "Haval Xiaolong" and "Haval Xiaolong MAX". Since then, "Xiaolong" has added the label of China’s best-selling SUV brand new energy vehicle, which has attracted the attention of more and more car users.

Two new cars, Haval Xiaolong MAX, are larger in size, and the product positioning emphasizes versatility, especially the core hybrid architecture. Great Wall Motor’s brand-new intelligent four-wheel drive electric hybrid technology Hi4 is adopted. In addition to the comfort and energy saving that ordinary plug-in hybrid models pay attention to, it emphasizes the four-wheel drive performance in full scene and full working condition. The official claims that "the price of two-wheel drive, the enjoyment of four-wheel drive, the energy consumption of two-wheel drive and the performance of four-wheel drive". In order to verify the last 3/4 of the previous sentence, we came to the Great Wall Motor Xu Shui Test Site and emphatically experienced the electric four-wheel drive of Haval Xiaolong MAX.

New hybrid architecture Hi4

It is necessary to briefly introduce Hi4, Hybrid intelligent 4WD, which adopts the structure of series-parallel electric four-wheel drive with two motors at the front and rear axles, and can realize nine modes: pure electric two-wheel drive, pure electric four-wheel drive, series mode, 1st gear direct drive, 2nd gear direct drive, parallel two-wheel drive, single-axis energy recovery and dual-axis energy recovery, so as to adapt to different driving requirements under various working conditions and make the engine and motor work in an efficient range. The combination of engine (ICE), 2-speed hybrid gearbox and front/rear axle motor is diverse and complicated. You can see the following picture to understand it.

At present, the Hi4 of Great Wall Motor has two sets of powertrains, with a maximum system power of 340kW, including two hybrid special engines of 1.5L and 1.5T, a 70kW front drive module assembly and a 150kW rear drive module assembly, which can cover different A-C models.

On Haval Xiaolong MAX, the fuel power system is a 1.5L engine with high thermal efficiency. Atkinson cycle, in-cylinder direct injection, 350bar fuel injection system, cylinder head integrated exhaust manifold, electronic water pump, electronic thermostat, high-energy ignition, cooling EGR system and other technologies are adopted. The thermal efficiency is 41.5%, the maximum power is 85kW, and the maximum torque is 140N.m.

For electric drive, the front motor is integrated into a two-speed hybrid special transmission, which is roughly equivalent to P2 structure. The rear axle motor has a maximum power of 150kW and a maximum torque of 350N.m The motor winding adopts high-efficiency flat wire+low-drag reducer, and the working efficiency of the assembly is ≥88.6%. Unlike many other plug-in hybrid vehicles, especially two-wheel drive vehicles, Haval Xiaolong MAX’s pure electric two-wheel drive is rear drive, so the rear axle motor must be strong enough, which is obvious in the later experience.

The power battery of Hi4 of Great Wall Motor has two different capacities, 19.94kWh/27.5kWh, especially its low internal resistance. It is made of laminated binaural design, NCM polycrystalline battery anode and other materials, and it can be charged quickly in DC at room temperature. The maximum charging power is 33kW, and it takes less than 30 minutes to change from 30% to 80%, and it also has the maximum discharging power of 3.3kW.. Haval Xiaolong MAX adopts a small battery version, with a pure battery life of 105km under NEDC working condition, a feed fuel consumption of 5.5L/ 1000km for WLTC, and a comprehensive battery life of over 1,000 km.

What is the energy consumption of urban road conditions?

From the hotel to the test site, no bus was arranged, but the media drove Haval Xiaolong MAX, which just happened to simply experience the performance of the car’s urban road conditions. Choose intelligent hybrid mode, and the system is mostly driven by pure electric power at low speed. At this time, Haval Xiaolong MAX is equivalent to a pure electric SUV, which is quiet and smooth, and its dynamic response is not too abrupt, and it is quite exciting to step on it a little deeply. When the vehicle speed is not fast enough, but there is a further demand for power, the engine will either start working or be used as a range extender to generate electricity for the rear motor to drive, which is a series mode; Either drive the front wheels through the gearbox, which is the first gear direct drive.

In urban road conditions, the speed of 60km/h or so, Haval Xiaolong MAX is mainly the above three driving modes, and most of them are pure electric driving. Even with the participation of the engine, the feeling inside the car is not obvious, and the smooth operation of the engine and the tacit connection between the gearbox and the motor. In addition, the energy recovery can be adjusted in multiple gears, and even if a single pedal is selected, the strength is strong, but it can still be accepted by the passengers in the same car. This shows that the latest hybrid technology of Great Wall Motor can meet the daily use needs well, and it is smooth and comfortable.

After a simple energy consumption test by media peers, the results show that Haval Xiaolong MAX has an average speed of 25km/h, an average fuel consumption of 4.4L/ 100 km and an average power consumption of 8.1kWh/ 100 km in a distance of more than 30 km. This energy consumption level is still good, which is the same as that of similar models currently on the market, but obviously less than that of fuel vehicles.

Site Experience Performance/Four-wheel Drive

With the blessing of electric motor, plug-in hybrid SUV can easily catch up with or even surpass traditional fuel vehicles in power performance, and so does Haval Xiaolong MAX. In the simplest and most direct acceleration, the official claims that the 0-100km/h acceleration time of Haval Xiaolong MAX is 6.8s, and the fuel vehicle with 2.0T engine at the same level is the level of 7s.

Haval Xiaolong MAX can eject and start, and the operation is simpler. Turn the driving mode to exercise, close the electronic stability program, and press the brake and accelerator pedal at the same time, the instrument will display "Ejection Start Activation", just release the brake pedal.

At the beginning, Hi4 was a pure electric four-wheel drive, and the front and rear motors were driven at the same time, achieving the best power effect. There was no hesitation, no tire slipping, and Haval Xiaolong MAX ejected, but the body posture was still relatively stable. With the increase of vehicle speed, the power demand continued, and the Hi in the middle and rear section entered the parallel four-wheel drive mode, and the engine started, which made up for the lack of high rotation and high speed of the motor to some extent, but the power matching between oil and electricity was tacit, and no connection action was felt.

Generally speaking, the Hi4 of Haval Xiaolong MAX is very energetic in the initial stage, and its acceleration ability is also good in the middle and late stage, mainly driven by motor, without considering the influence of mechanical structure at all. It is said that someone measured the fastest acceleration of 6.5s seconds that day, and the extreme power is worthy of recognition. It should be noted that this achievement was obtained when the vehicle was fully charged.

The power and efficiency of the motor are also reflected in climbing. The Great Wall Xu Shui Test Site has 30%-60% steep slopes for all kinds of off-road vehicles, and Haval Xiaolong MAX has no problem in challenging 50% steep slopes. It only takes 1/3 of the accelerator pedal at the foot to be OK, and the power output is sustained and stable, and the climbing state is very easy.

In contrast, the driver needs to adapt to climbing a big slope. On 50% of the slope, the ground can’t be seen in front of him. With a 360+180 transparent chassis, there is no problem. When going downhill, there is biaxial kinetic energy recovery, which has stronger braking power and higher energy utilization.

In addition to power, Haval Xiaolong MAX’s Hi4 electric four-wheel drive also has certain off-road capability, such as passing through uneven wooden stakes and simulating the steps that parking in the city may encounter. At this point, just adjust the driving mode to four-wheel drive, and the rest is the sentence "Just step on the accelerator and give it to Hi4". The characteristics of the instantaneous output of high torque by the motor make it easy to deal with this situation of low speed and large resistance, and the process of power output is not abrupt, so drivers don’t have to worry about the impact of power, which will cause damage to tires and chassis when passing through obstacles.

Obviously, this has something to do with the power control of Hi4. The core is iTVC intelligent torque vector control system. By analyzing the driver’s power demand, vehicle speed, driving mode, road slope, steering wheel angle, motor speed and other conditions, different car scenes can be identified, the torque of front and rear axles can be reasonably distributed in real time, and it can be quickly adjusted between 100:0 and 0:100, making full use of the grip of front and rear wheels, and increasing the non-slip wheels while maintaining a stable start. Between the coaxial left and right wheels, the electronic stability system is responsible for limiting slip, and braking force is involved when necessary to reduce wheel slip.

Compared with the timely four-wheel drive with the main structure of electric multi-disc clutch in general fuel vehicles, the Hi4 electric four-wheel drive of Haval Xiaolong MAX has faster response speed and better driving effect in front and rear power adjustment and torque distribution. In addition to the above extreme road conditions, it is more suitable for paving road conditions, such as curve driving, which we often say. When entering a curve, the rear axle torque is increased to realize rapid entering a curve, and the front axle torque is increased when leaving a curve to improve stability. There is also a rainy and snowy day, and the road surface is slippery. The Haval Xiaolong MAX with Hi4 electric four-wheel drive will be more stable (tires are the key).

Summary:

Consumers favor plug-in hybrid vehicles, which not only have the advantages of smooth power, economy and energy saving, but also expect them to have stronger performance and richer application scenarios. The Haval Xiaolong MAX equipped with Hi4 four-wheel drive is more comprehensive through the experience of daily driving and extreme testing. With the continuous infiltration of new energy vehicles, consumers’ demands are getting higher and higher, often both necessary and desirable. As a well-known SUV brand in China and even the world, it is necessary for Haval to launch a model like Haval Xiaolong MAX to meet consumers’ expectations, and of course, it is hoped that its price will surprise people.