[ Car home Active emergency braking test ] From the original transportation tools to today's intelligent terminals , The role of the car has fundamentally changed , I often ask myself what smart cars can bring us ？ It doesn't have one more engine to make horsepower higher , There are no more pairs of tires to make traction stronger , There is no more pair of wings to turn into a flying car , There's just radar 、 camera 、 chip 、 The screen will move “ Intelligent terminal ”. The significance of smart cars is to make driving more comfortable ―― Give part of the driving right to the car , Listen to a song 、 Order a takeout 、 Set a schedule , Let the car replace your mobile phone to meet your travel needs ; Another significance is to make driving safer ―― It is different from upgrading the traditional body design , Stop the collision one second before the collision .
Qijun, a veteran who has been galloping in China for many years , I believe most people are no stranger .2000 In, the first generation of Qijun came out , In the next eight years , It has been active in the Chinese market as an imported car , But comparable to the current price of luxury cars , In those eight years, let it remain tepid .
The transfer took place in 2008 year , With the second generation Qijun made by Dongfeng Nissan ,20-25 The price of 10000 will directly seize the first opportunity CR-V Pull down the altar , Since then, a confrontation has been formed . With a year later RAV4 The addition of , After more than ten years of wind and rain , The price range 、 The situation of tripartite confrontation in vehicle positioning has not been broken , Even if the opponent changes one crop after another , The three brothers are still in love and kill each other .
In the background of intelligence and Z Under the trend of car buying in the times , Qijun ushered in another innovation , Whether it is the younger appearance design or the enhanced version ProPILOT, Not even “ Three cylinder ” Dazzling , But for the driving experience of the car , We have carried out detailed tests , Interested friends can click 《“ sin ” And sincerity Test the new generation of Nissan Qijun first 》. And today we mainly talk about the enhanced version ProPILOT in NISSAN i-SAFETY Intelligent active security system .
According to foreign media sources , Qijun's perception scheme has been enhanced , In addition to making perception more efficient , At the same time, under this background, the deceleration braking can be more relaxed . Besides , Through more efficient perception and data communication between navigation systems , Make Qijun's driving assistance in high-speed Cruise , Be able to identify the speed limit , At the same time on the ramp 、 Automatic deceleration in curve , Help the driver pass . Of course, this belongs to the category of comfortable driving , What about safety ？ Anxious friends can learn about... Through the following short film .
Rear impact test
Anti rear end braking simulates the fatigue of the vehicle owner while driving the vehicle 、 Wander 、 Failure to achieve timely and effective braking operation for various reasons such as answering the phone , So as to collide with the car in front . Anti rear end braking is AEB The most basic function of the system , It also covers most application scenarios of medium and low speed driving in cities .
We are divided by 10km/h、20km/h、30km/h、40km/h、50km/h Drive at a constant speed , See if the vehicle can stop in front of the simulated vehicle to avoid collision . among 10-30km/h Simulate the low-speed driving scene of vehicles in the community ,30km/h The above tests the system response during daily driving .
From the results , Qijun passed all the items of rear end collision test , But I still want to share some details with you .
Pedestrian detection test
Test the car to 30km/h Drive at a constant speed , Test it facing the fixed dummy 、 Move the dummy and “ Ghost probe ” Reactions to three different scenarios , Due to the small size of the dummy , It's more difficult to find when blocked by a car , So the difficulty increases step by step .
For active emergency braking system equipped with camera sensor , It's easier to tell what the obstacle is . With the above experience of passing the stationary obstacle test , How did Qijun perform on the dummy ？ After all, in the community 、 There are more and more accidents of low-speed pedestrian collisions at intersections , If the system is strong enough , It's good for every traffic participant .
Additional stability tests
In the active emergency braking test project , Except to see if the system can stop , It also depends on whether the brake is stable . Specifically, we take 30km/h Conduct 10 Successive rear end tests . By measuring the distance from the obstacle car when braking , It can better evaluate the stability of this system . The smaller the difference between ten times , We judge that the system is more stable , Good stability provides effective guarantee for each potential accident risk , Imagine even the same thing at the same speed , The difference in braking distance is a millimetre , It could turn into an accident .
10 The data of the braking distance of the fake car is as follows . According to the principles of Statistics , Remove a highest value , A minimum value , So we get the average of this set of data ：164.75cm.
|Summary of distance from Qijun stability test to front vehicle|
|Number of tests||1||2||3||4||5||6||7||8||9||10|
|Distance from the front vehicle after braking （ centimeter ）||170||165||165||165||163||166||164||178||160||160|
On the whole , At the stability level, the difference of each group of data is controlled within 10 Inside , Combined with previous data , Qijun performed very well in this project .
At the end ：
Simply speaking , Qijun's performance in active emergency braking is , The system works well , But you need to catch your breath after starting several times , And the braking force is large . In our previous accident analysis , Many are due to ghost probes at intersections 、 Accidents caused by untimely braking at intersections , If it is light, it will cause vehicle damage , Serious injuries occur . The emergence of active emergency braking system is expected to greatly reduce the probability of accidents , But anyway , Please remember , At this stage, the era of automatic driving has not yet come , Including driving AIDS 、 Active emergency braking, etc , Its role is still to assist , Give the driver a hand in a crisis , You still need to pay attention when driving on the road , Always pay attention to safe driving .（ writing Car home Li Xiang chart Leng Xiaoyang ）