Every year in the cold winter, a variety of car ice and snow test driving projects will arrive as scheduled, in the extremely cold environment to feel the limits of the vehicle, not only let people have a fuller understanding of the product characteristics, but also can enjoy the smooth driving experience that has not been seen in the weekdays. Recently, the "Burning Ice and Snow All-round Family Car MVP Battle" sponsored by Cheyun Network officially kicked off in Suihua City, Heilongjiang, and the two sides were geely Xingrui, a star product of the independent brand car, and Volkswagen Sagittarius, a joint venture veteran. In the extremely cold environment of about minus 20 ° C, the two cars passed the three assessments of braking (AEB), ring racing, and extreme weight. In the end, with the participation and witness of more than 20 media, Geely Xingrui suppressed Volkswagen Sagittarius with a substantial advantage and won the championship battle.
Combustion engine brake (AEB test)
Test conditions: The project was carried out in the case of cement sand and gravel road after the temperature of minus 16.7 °C, northwest wind direction, 4.5 m/s wind speed, and two vehicles were driven at the same speed to the fixed obstacle represented by the fake car, in order to test the reliability of the AEB active collision avoidance system of Geely Xingrui and Volkswagen Sagittarius.
As can be seen from the table, Sagitar was exposed to the obstacle of the fake car in the second round of 40km/h test, which ended in failure. Then Xingrui successfully completed the 45km/h test through the vehicle's own excellent AEB automatic emergency braking technology, while the dashboard has an image and sound warning prompt, automatically opens the double flash, the vehicle will decisively take emergency braking measures, and there is no slippage after braking, and finally it can be safely stopped in front of the obstacle.
Regarding the importance of active safety configuration of vehicles, many problems can be explained in this test session. As we all know, during the driving process of the vehicle, due to the complexity of the traffic, the driver often encounters slow or urgent braking operations, and the results are often related to the driver's ability to react. Based on the AEB/AEB-P automatic emergency braking system, this active safety configuration can identify vehicles and pedestrians in complex traffic with maximum efficiency, and provide functions such as early warning and active braking before collision, so that the system can accurately identify vehicles and pedestrians while more effectively alleviating or avoiding accidents.
As for why Xingrui won the combustion brake project? Vehicle intelligence and system reliability clearly have an advantage. First of all, from the hardware level analysis, Xingrui has 1 monocular camera + 1 millimeter wave radar + 4 high-definition cameras + 12 ultrasonic radars, in order to provide a super data reference for the entire set of L2 intelligent driving assistance systems in the whole vehicle. The AEB active braking system relies on 1 monocular camera + 1 millimeter wave radar, which is 1 more monocular camera than the competitor Sagittarius, and the detection range of 120m makes it more accurate to identify.
Secondly, thanks to the penetrating double diaphragm vacuum booster and ITT copper-free brake pads, Xingrui only needs a short 34.66m brake stop by 100km/h on the normal road surface, which is even far beyond the high-performance supercar, which fully demonstrates the strong driving and control strength of CMA products. Therefore, the braking effect of active braking when driving Xingrui in the combustion engine brake test project is not only not rigid, but also the recognition rate is accurate and the response is rapid, compared with Xingrui, which can bring excellent experience effect to the driver.
Circle Racing
Test conditions: The project is to drive in a circle on the ice surface at an altitude of 232 m and 45 cm thick after the temperature is minus 18.3 °C, the northwest wind direction, the wind speed of 4.7 m/s, and the nail tire is replaced to test the control ability of Geely Xingrui and Volkswagen Sagittarius. Similarly, in order to ensure the impartiality of the test, the two vehicles were tested in groups under the same test conditions.
In the process of racing, Volkswagen Sagittarius frequently has the phenomenon of vehicle skidding out of control, understeering and idling, and Geely Xingrui has timely and effectively suppressed the above conditions under the blessing of a number of black technologies. In the end, the result was that the best lap time of Geely Xingrui was 33.27s, and volkswagen Sagittarius was 34.45s. And in the average lap time of 20 test media, Geely Xingrui is far superior to Volkswagen Sagittarius with an advantage of nearly 2 seconds.
This project is also one of the most talked about by the participating media, after all, in the daily urban road, it is difficult to have such an extreme control environment that can "scatter flowers". In fact, whether it is vehicle roll, stability or power output, the participating media have praised Geely Xingrui's driving experience.
The so-called ring racing, if you want to effectively improve the lap speed, the most important thing is the stability of the vehicle, which greatly tests the original rigidity of the body, as well as the mutual cooperation between the chassis parts and the robustness of the frame itself. Driving in the ice and snow ring with a diameter of 200m, Sagitar feels softer and more comfortable, and the feedback of the entire chassis including the steering feel is the traditional home tuning style, which seems to be less in the communication of the human workshop. Although Sagittarius is a little smaller than Xingrui, it does not play a dexterous advantage, including the output of the feedback power of the entire throttle is more lazy, so this also leads to the method of driving according to the driving will, need to be through more "repair direction" and through the throttle brake more careful output to combat the phenomenon of loss of control, it is obvious that if you want to make good results, Sagittarius needs to have higher requirements for driving technology in this link.
On the other hand, Xingrui is different, and the CMA super matrix gives Xingrui a fairly good performance talent. Although the two cars used the same tires in the test environment, the driving experience reflected by Xingrui was more in line with the driver's intentions. The output and connection of the whole movement are smoother, and the intervention of stabilization systems such as ESP is more accurate and natural, which provides full confidence when driving in the ice and snow circle. In addition, Xingrui will not be because of the 2.0T engine 140kW, 300Nm abundant power and create the driver's loss of control, power loss trouble, easy to surpass sagittarius in one fell swoop, the performance on the ice and snow ring is undoubtedly more comfortable.
The reason why the two cars have completely different performances, it is not difficult to find the mystery after a simple comparison, such as CMA wire control chassis technology has helped Xingrui a lot. The entire suspension of Xingrui is more tight and pays more attention to sports attributes. Compared with Sagitar, Xingrui has inherent advantages in the following aspects. First of all, it has the widest front/rear wheelbase of 1618mm in its class (Sagitar: 1543mm front; rear: 1546mm), which can help the vehicle achieve better stability in corners. Second, Xingrui also has the longest suspension stroke of the same level, front: 185mm; rear 203mm, which can make the body compress on one side, and the other side of the wheel retains a larger contact area with the ground, in exchange for better adhesion, which can significantly improve the driver's response to the vehicle's handling perception, thereby enhancing the dynamic performance of the vehicle. In addition, coupled with the super tough body resistant to 29000Nm/deg torsional stiffness, it is not surprising that Xingrui has a more comfortable and flexible dynamic performance in this project.
Extreme weight bearing
Test conditions: The project is to drag the ice surface at an altitude of 232 meters and 45 cm thickness after the temperature is minus 18.3 °C, the northwest wind direction, the wind speed of 4.7 m/ s, and the ice surface at an altitude of 232 meters and 45 cm thickness after the snow tire is replaced, and the load increment of 300 kg to 1000 kg is dragged to carry out a straight line acceleration test to test the load bearing capacity and linear acceleration ability of Geely Xingrui and Volkswagen Sagittarius. Similarly, in order to ensure the impartiality of the test, the two vehicles were tested in groups under the same test conditions.
In this project, the test was that the two cars were carrying heavy loads on ice and snow roads with extremely low grip, and the power included the load capacity of the frame. First of all, because sagittarius is equipped with a relatively small displacement 1.4T engine, matching the 7-speed dual-clutch transmission, in the 300-1000 kg load test, driving sagittarius in the later stage of the heavier load, the driving process is obviously difficult, with the front of the car cocked, the power can not be better transmitted to the wheel, resulting in strong slippage, the throttle opening has to become larger and larger. When carrying a weight of 1000 pounds, the body of the car has a serious deviation during the acceleration process of Sagittarius, and can only be suspended and withdrawn from the challenge. And Xingrui should be much more relaxed when carrying out this project. In the 300-1000 pound challenge, Xingrui has a more powerful 2.0T engine, so the load forward process is much calmer than Sagitar. Due to the extensive use of sound insulation materials in the carriage, the sound of the engine is effectively isolated from the outside of the car, leaving a breeze in the car. Xingrui's throttle opening does not need to be very large, so that the effective power can be transmitted to the tire steadily and successfully pass the challenge.
Subsequently, Xingrui also challenged the load of 1360 kilograms, 1380 kilograms and 1400 kilograms with strength, and the results were really surprising, because as the load became heavier, the speed of Xingrui acceleration did not need to climb to drive the vehicle forward, and finally stopped breaking through the limit due to the consideration of ice thickness and safety.
In the process of weight-bearing linear acceleration, more than 20 media have also personally participated in it, sitting in the car to intuitively feel the vehicle power output and ESC slip limit effect, it is clear that Geely Xingrui can give drivers and occupants more security and confidence.
In fact, in terms of power level, The dominant Xingrui does have a strength beyond imagination. The 2.0TD engine powered by Geely Xingrui can bring a maximum power of 140kW and a peak torque of 300Nm, and uses a low inertia turbocharger, when the engine speed reaches 1000rpm, the turbine can intervene to work, reducing the phenomenon of turbo hysteresis. Compared with the Sagitar 1.4T engine 110kW, 250Nm, the power performance is thicker, the power output process is more uniform, and the final result is also reflected in this test link.
In addition, we are also more concerned about whether the huge force acting on the trailer hook at the rear of the car will cause damage to the vehicle. In fact, in the entire car-making architecture of Xingrui and even CMA super matrix, the super rigid frame is not only the key to vehicle handling, but also an important factor in the passive safety of the vehicle, and the torsional stiffness of the body of Xingrui can reach 29000 N·m/deg, which is even 1/3 stronger than many luxury brand models, which is quite remarkable. It is precisely for this reason that in this test project, Xingrui can continue to move forward steadily under the premise of high-intensity loads, without excessive skidding and body deviation.
summary
The "Burning Ice and Snow All-Round Family Car MVP Battle" is simply full of highlights, and in the ice and snow driving environment that we can hardly reach in our daily life, it is a great harvest to be able to drive two outstanding models through the three-way project. Judging from the results, Geely Xingrui has crushed the strength of the joint venture player Volkswagen Sagittarius in all aspects, and its emergence has not only brought users a better experience of automotive products, but also achieved a comprehensive product value that surpasses the strong joint venture brand. The strength of Xingrui's "super cup" is in the spirit of Chinese stars, and it has fully the strength to catch up with the joint venture brand products, which is the pride of China's automobile industry.