Most of the middle and low -end cars are the front -wheel drive, and most of the high -end cars are rear -wheel drive.
Let\'s take a look at the front -wheel drive system first, which is the most widely used today.
First of all, it can reduce the cost of the car, which is why many automobile manufacturers today use this driving system. The front -wheel drive (FWD) is much cheaper in manufacturing and installation than the rear -wheel drive (RWD). It does not use the driver shaft under the cockpit, nor does it need to make a rear bridge shell. The transmission and the differential are assembled in a shell, so that there are fewer parts required. This front -wheel drive system can also make designers more convenient to install other components at the bottom of the car, such as braking systems, fuel supply systems and exhaust systems.
Reducing the weight of the vehicle is another advantage of the front wheel drive. Reducing the weight of the car can improve acceleration, braking and fuel economy. Because the driver of the front wheel -drive car is inherited by the weight of the engine and the driver bridge, it can increase the adhesion of the driver wheel, which will help the cars driving on a slippery road.
The biggest advantage of the front -wheel drive is that it can have a large indoor space, and there will be a large protrusions in the cab. Looking at the Honda Civic (CIVIC), you will find that this kind of car can also have many cars that cannot be compared with the rear seat space. The reason is that there is a flat bottom plate. It will increase.
The main disadvantage of the front -wheel drive is to make the manipulation of the car worse. Because most of the quality is concentrated in the front of the car, the rear of the car will become lighter, so that the adhesion of the rear wheel will become smaller, and it is easy to occur on the rear of the car covered with ice coverage. Side. However, this problem has now been solved. The designer will set the weight as much as possible at the rear of the car when designing. Cars rarely reach or approach this ratio.
Another disadvantage is the load affected by the front wheel. The front wheels must pass acceleration, and the ground acts on the tires when turning and braking. The adhesion of the tire is limited. When the adhesion is used to accelerate, it will definitely reduce its force on other parts. And this kind of force is undertaken by the rear wheel, it only needs to roll with the front wheel.
The disadvantages of all front -wheel drive systems are the advantages of the rear -wheel drive system. As some mechanical parts move from the front of the car to the back, the balance and operability of the car will be greatly improved. When the rear -wheel drive cars are accelerated, the traction will not be sent from the front wheel. Therefore, when the turning is accelerated, the driver will feel a greater horizontal grip and the operating performance will be better. This is why the world\'s high -speed sports cars and high -performance cars use rear -wheel drive.
Low maintenance costs are also an advantage of rear wheel drive. Although this cost will be very different due to the different structures and models. However, if your gear transmission has a failure, you do not need to repair the differential car for the rear -wheel drive, but this may be necessary for the front -wheel drive car, because these two components are done together together of. However, after decades of development, the reliability of front -wheel drive cars has also developed greatly. The high maintenance cost may not be a big problem.
The disadvantages of the rear -wheel drive are also obvious, such as relatively high assembly and manufacturing costs, more faults, relatively small indoor space, and so on. At present, more cars are used by the independent rear suspension system, so that the designer can closer the car body from the differential and the spreader and the transmission shaft when designing, which can increase the indoor space.
Little traction has always been a problem of rear -wheel drive cars, because the load that the rear wheels bear are relatively small, but the current electronic equipment has changed this. The traction control system and the body stable electronic system can allow the rear -wheel drive cars to achieve the same performance as the front -wheel drive cars on the slippery road. Improved tire design technology can also improve the defect of rear -wheel drive cars.
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