What is the difference between metal bumpers and plastics, lightweight cars, and cutting corners?

The car is lighter, faster, more manoeuvrable, and lower in fuel consumption. So whether it is active or forced, each brand is trying its best to make the car less heavy.

The simplest and straightforward way is to change skin and skeleton.

The body is usually composed of steels of different strengths. Under the premise of not reducing safety, high-grade cars will use aluminum alloy instead of steel, and local magnates may choose magnesium alloys.

Carbon fiber materials can be described as valiant, the same volume of carbon fiber, the weight of only 20% of steel, strength is 10 times more than steel.

Unfortunately, the raw materials are too expensive and the manufacturing cost is high. Even the BMW 7 Series is only willing to use a little bit on the body.

Ordinary family cars cannot afford the aluminum alloy of the whole vehicle, and they want to lose weight. They can also replace some parts of steel with plastic.

As the Academy of Vehicles reminds you, don't worry about the manufacturers. It doesn't matter if the front and rear fenders are safe. It doesn't matter if they are replaced by plastic.

Some car tanks have also been changed to plastic materials, lighter and safer than iron tanks, and can be made into complex shapes.

In addition, there are some new "lose weight" technologies, such as laser welding, that save a toss weight per weld.

Nowadays, the automotive industry is also popular with broken holes - drilling holes in various places. This is by no means cutting corners. It is purely to reduce the weight of structural parts without reducing the strength. In fact, the cost is higher than the material cost saved.

Car companies are trying to lose weight, so don't use car light weight to evaluate the good or bad. Suspected car is light, open and floating, you can put a few pairs of dumbbells in the trunk ~