Luxury car bar generally have to pursue higher performance, this errand front drive is no way to meet, can only choose the back drive, which makes the rear drive become a luxury, high-end synonymous.
The rear drive material is more sufficient and looks advanced
In the past, the precursor was high-tech
The rear drive was not labeled luxurious and advanced from the beginning, and in the past, the front drive was high-tech.
In the history of the automobile industry, the rear drive is the most traditional driving method, and at the beginning, everyone built a rear drive car.
Although the front drive was invented for a similar time, at that time, the front wheel was responsible for steering and driving at the same time, which was too complicated, the durability was not good, and the maintenance was not convenient, which was a problem.
Before 1970, almost only Audi had relatively mature front-drive technology and had been producing front-drive models.
But the purpose of developing the precursor was to save costs
But whether audi or other manufacturers, the production of front-drive models is essentially to reduce costs.
Because compared to the rear drive, the front drive can reduce the transmission without having to put in extra effort on NVH.
Tang Zi et al. published a paper in the journal Mechanical Design and Manufacturing, "Research on the Vibration Mechanism of Coupling between Front-facing rear-drive Vehicle Drivetrain and Body", which said above.
Due to the long drive train of the front-mounted rear-drive car, the vibration and noise problem caused by the drive train is more serious, and the NVH control technology is more difficult.
To put it bluntly: If the front is the engine and the back is the drive wheel, isn't there a drive shaft in the middle? The whole root is connected from the front to the end, right?
The parts and amplitude of vibrations that passengers in the car can feel will increase, resulting in a larger price for rear-drive vehicles to deal with NVH.
NVH What? The simple understanding is the sense of quieter, more advanced quality.
On the other hand, in the rear drive, this part of the material is more sufficient, the luxury car spends more thought, and the quality, high-end, luxury will also be a little bit of the side.
For luxury cars, the rear drive can meet the performance requirements
With the development of technology, the performance requirements of high-end cars are also getting higher and higher, and the structure of the front drive is slowly discovering a problem called "insufficient".
There are no torque steering problems with the rear drive
First of all, the more luxurious the car, the greater the horsepower, easy to understand, right? Ordinary transverse front-drive structures have a natural weakness called "torque steering."
The car did not feel when it drove, the horsepower was large, and the problem was revealed.
Wang Kai et al. published a paper in the journal "Times Auto", "Torque Steering Optimization of Front-Drive Models", which said above.
Due to the lateral position of the engine in the front-drive car, the gearbox is usually not in the center, but biased on one side, and the angle of the left and right half shafts is different, which will make the torque distribution to the left and right sides unequal, so it is easy to accelerate and deviate.
Some front-drive vehicles have a lot of horsepower, you can try it, the steering wheel is placed there, don't do anything, just use a lot of force, slam on the accelerator, "chew" out.
It's not straight, a bit to the side, or even a bit like an automatic turn, which is interesting, pay attention to safety.
Therefore, the horsepower of the front-drive car on the market generally does not exceed 350 horses, but the back-drive car does not have this thing, and these high-end cars of 6-cylinder and 8-cylinder are basically selected for the rear-drive, and there is no such problem.
The rear drive is able to meet the needs of high horsepower
In addition, even if the physical characteristic of torque steering is not present, the rear drive can exert better power than the front drive.
Gu Feihong published a paper in the journal "Science and Technology Wind", "A Brief Analysis of the Difference Between the Front-Drive Mode and the Front-End Rear-Drive Model of the Car", said above.
When accelerating, the center of gravity is on the rear wheel, and the friction of the rear wheel will be significantly higher than that of the front wheel, which will lead to the traction and traction performance of the rear drive being much better than that of the front wheel.
For example, many supercars, F1 cars, and even Wuling Hongguang are rear-drive, that is, there are requirements for traction.
It is easier to balance the weight of the body and improve stability
Finally, the rear-drive structure also makes it easier to improve the handling and stability of the body.
Or the paper just now: the ideal state of the car counterweight is 50 in front of the front than the 50 in the back, that is, the same, the closer to such a 50:50 counterweight ratio, the smoother the driving.
Since the engine, gearbox, and drive shaft are evenly distributed on a longitudinal plane, it is easier to achieve such a layout.
For example, BMW, which has always advertised its own good handling performance, is working very hard to get close to the counterweight ratio of the top 50 and the back 50.
The rear drive can meet the pursuit of high performance and high control
All in all, because the rear drive is inherently able to meet the luxury car's pursuit of high performance and high handling, it will lead to luxury cars almost all rear drive.
It's not that this is a historical inheritance, there is a cultural heritage, and people don't sell alcohol.
In addition, although the front drive has always been a newer technology, it has always served the goal of "more economical and cost-effective", the cost of the depot is lower, the cost of the owner is lower, and the low cost and luxury are not very compatible.
Therefore, it will lead to the "no back drive and no luxury" statement that appears later, which is not the feelings and historical reasons we talk about, but more realistic considerations and practical bases.
Is it to pay the IQ tax for a car that cost tens of thousands more to buy four-wheel drive?
Compared with the rear drive and the front drive, what is the name of the uncle now? Brother, my name is "four-wheel drive", isn't it? Don't argue, I'm four-wheel drive, it sounds like a more comprehensive, more advanced existence.
Is it necessary to spend tens of thousands more on four-wheel drive when buying a car?
Four-wheel drive generally appears more on SUV, but someone said: "Urban SUV, isn't this four-wheel drive like a decoration?" Is there any truth to this statement?
Is it useful to drive bad roads and go off-road? What are the advantages of SUV vs. sedan? What are the disadvantages?
Keyword: SUV
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bibliography
Wang Ziqiang,Zhao Ming,Tang Zi,Yan Bing. Research on the vibration mechanism of coupling between front-facing rear-drive vehicle drive train and body[J].Mechanical Design and Manufacturing, 2017.
[2] WANG Kai,DU Wenming,WANG Sen,DING Changwei,YU Yang,YE Ming. Torque steering optimization of front-drive models[J].Times Automotive, 2018.
GU Feihong. A brief analysis of the difference between the front-drive mode and the front-facing rear-drive mode of the car[J].Science and Technology Wind, 2015.