2012年10月15日星期一

Talk about lightweight car with security

Two years ago, I once wrote an article on the lightweighting of automobile safety and the relationship between this paper, but not formally published, this old problem revisited, again.
In order to reduce the weight of the body, such as the BMW M6, high-performance models using carbon fiber roof, as well as for the appearance of.
Lightweight automobile driving, for most of the original car, not a negative factor, instead, I met the owner to purchase a car when the nive out of ten, will think your car is the heavier the better, " accord not, too light, just a ton of six, not in crashworthiness! " ; " Mercedes, a small E class, almost two tons, safety! " It is said that " safe ", but this is a fallacy. Body weight increase, the car factory, are in fact a which it would be awkward to disclose, consumers want their car, interior space, luxury equipment is the more the better, so car can be sold, in order to meet the market demand, the car factory only consumed more steel, leather, plastic, or wood, more exaggerated is to use the true marble to create atmosphere car compartment, naturally generation to generation, check the vehicle information will be found, most of the changes the funds vehicle, the weight will exceed the past. But the body weight increase, for those on the car have a superficial knowledge of consumers, it is a good thing, they think of is " thick steel plate. "; " there are leather "; " space many " and so on, but in order to these, engine exhaust volume increase, or to write the trip computer, let the engine work, know the law of conservation of mass? Work is much, except in part from the combustion efficiency increases and other technical factors, more because of the oil consumption increases. Increases the weight of the vehicle, which leads to the other part of the load is increased, the suspension system of load increase, will inevitably lead to decreased mobility; tire load nature also be nothing difficult; and the braking system, the weight of large inertia, large braking system, in addition to control the rolling friction, and good control of sliding friction, the latter for safety great influence, the author has tested a domestic change fund car, body weight than the previous generation in many, although tire upgrade, but the test performance of a braking system, the braking of inertia that broke out in a cold sweat.

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