Bitche Original Every winter, Harbin will become a popular tourist destination, and many southern little potatoes come to experience the fun of ice and snow. But for vehicles such as cars, using a car in winter is often a great test.
In the north, where the temperature is often more than ten degrees below zero, it becomes more difficult to use a car. Vehicle troubles such as difficulty in starting the vehicle at low temperatures, difficulty in climbing on icy and snowy roads, unstable driving and easy slipping and accidents, slow heating of the air conditioner in the car, increased fuel consumption, etc. are common.
Moreover, the north and south of our country span nearly 50 degrees, with huge climate differences, covering high cold, high temperature, plateau and other environments. The driving habits of the north and the south are very different. So how can we solve the problem of vehicle stability under these harsh conditions? For many traditional large car companies, their solution is to establish a complete R&D verification base and test verification system.
1. Sufficient test verification can ensure vehicle quality
Take GAC Trumpchi as an example, it has more than 13The base and 70 more than 70 typical road conditions and extreme environment test points, covering "five highs, one mountain and one dust" climate adaptable roads in the whole region: alpine, high temperature, plateau, high Wet, high-corrosion (salt spray), mountainous areas, and sand and dust, implemented 16 major test items, exceeding 450Verification sub-projects, 23 sets of systems and components.
And in today's environment where model updates are getting faster and faster, GAC Trumpchi still insists on two winters and one summer test verification, using more test time and test mileage to ensure vehicle quality.
So how do GAC Trumpchi's cars actually perform in severe cold areas? I conducted an in-depth test drive of the new second-generation GS8 on the icy and snowy roads in Harbin and on the ice of the Songhua River, which was 20 below zero.
2. Driving dynamics on icy and snowy roads respond smoothly
Trumpchi GS8 Pilot Series is equipped with Julang Power’s high-power 2.0T GDI engine + Aisin’s third generation 8AT< /span> powertrain, and matched with the AVDC shadow driver function to form a golden dynamic control combination, with a rated power of 185kW; at the same time, after GCCS combustion With the upgrade of patented technology and the optimization of the latest engine calibration technology, the engine torque has increased from 390NmUpgraded to 400N·m.
At the same time, the maximum input torque of Aisin's third-generation 8AT gearbox has been increased to 550N·m, and the shift response speed and shift smoothness are at the leading level in the industry. In addition, the speed ratio range has been expanded by 25.4%, and the locking area is as low as 1000rpm, improving power and fuel economy.
It is worth mentioning that the reliability verification of this engine bench has accumulated >21 thousand hours, which is equivalent to the vehicle mileage of 1000 ten thousand kilometers, and the durability of the whole vehicle has been verified. It has accumulated >3 million kilometers and has higher reliability. Under the conditions of 20 below zero in Harbin, GAC Trumpchi left the GS8 door fully open for 48 hours and it was still able to start normally, confirming that The cold-resistant strength of the engine.
For icy and snowy roads, what we want to look at is not just the pure power data, but more importantly, the power output adjustment level of the vehicle. On the ice of Harbin's Songhua River, Trumpchi's GS8's power output remained smooth and linear, whether in snow mode, comfort or sport mode, and the vehicle was equally stable and reliable when accelerating.
At the same time, the four-wheel drive system of Trumpchi GS8 adopts Haldex (Haldex) electro-hydraulic torque manager, and the response speed does not exceed 0.2s, four-wheel drive torque accuracy improved by more than 5%, the four-wheel drive peak torque is increased by 11%, the vehicle's four-wheel drive performance is more outstanding, daily driving intervention speed is faster, the four-wheel drive system works more smoothly, the ability to escape from trouble is stronger, and the durability life is longer.
3. Megstar chassis is flexible and solid
The chassis performance of Trumpchi GS8 also left a deep impression on me. On icy roads, because the adhesion is very low, the vehicle will slip when cornering quickly. , but the vehicle is still very controllable. With a slight reverse direction, the body can return to normal. And even through relatively sharp corners, I can clearly feel that the dynamics of the rear of the car are very flexible, and the tracking of the entire car is excellent, not like a big car.
In addition, under normal asphalt road conditions, the chassis of Trumpchi GS8 also feels very "integrated" to me. The dual hydraulic suspension powertrain and high-performance shock absorber valve system can work very well. Well optimized impact strength and aftershock. When faced with poor road conditions such as potholes on unpaved roads and uneven national highways, the suspension system can absorb fine vibrations. When faced with jumps and large potholes, the body can also "absorb" as much as possible "On the ground, there will be no unnecessary shaking of the car body, and it has a strong sense of luxury.
4. "Secret Weapon"——AVDCShadow Driver
It is worth mentioning that the second-generation Trumpchi GS8 is also equipped with a "secret weapon" - AVDC shadow driver. AVDC (Adaptive Vehicle Dynamic Control) stands for GAC Adaptive Vehicle Dynamic Control System. This system uses "domain control" to integrate EMS, TCU, and ESP , four-wheel drive and other systems are integrated, and then intelligently adapt to the current status.
AdaptiveCompared with previous vehicle body stabilization systems, the difference between the vehicle dynamic control system and the previous vehicle body stabilization system lies in "dynamics". When the traditional vehicle body stabilization system is triggered, the vehicle has already skidded or lost control; while the adaptive vehicle dynamic control system can respond to the driver's operations at any time. According to the current vehicle status, the dynamic performance of the vehicle is changed in real time, so that the dynamic response of the vehicle and the driver's intention can be integrated into one during driving.
In the ice acceleration and braking tests, I accelerated the GS8 to 103km/h and then braked again. The vehicle did not lose control at all, but remained stable. It stopped steadily, and the performance of the vehicle's drive system and braking system is indeed worthy of praise.
Written at the end: Currently, new cars with technology and smart labels are emerging one after another, but the real test of car companies is not superficial skills, but reliable quality under harsh conditions. In this test drive, Trumpchi GS8 indeed performed stably and reliably in the cold Northeast. Whether it's power, chassis or "secret weapon" - Shadow Driver left a deep impression on me, and these, as the most basic and core qualities of a car, are what we consumers should pay more attention to.
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