Today, we then talk about the new BMW 5 Series, look at the chassis structure, materials, whether there is a greater surprise?
Chassis flatness: the international top level
When the vehicle is raised, really like we look forward to Turbocharger the general, quite flat chassis, is definitely the top level.
The front of the vehicle installed two large white flower under the aluminum plate, you can see the BMW 5 Series in the engine, gearbox protection, and the overall lightweight under the foot of the time. And this is what we have so far, the first time to see the use of two aluminum alloy plate models!
In addition, both sides of the glass fiber under the protection board, aluminum chassis fixed frame, the chassis spray, a no less! Especially the rear drive shaft was hidden above the exhaust pipe, the protection is in place! BMW or that BMW, in the basic design everywhere reflect the first-class level!
Front suspension: aluminum alloy double wishbone
BMW new 5 series front sub-frame appears to be a full frame structure, but in fact a H-type structure, but in front of the installation of a fixed pole, and is all aluminum alloy material. May be a lot of friends will ask, not the whole frame of the sub-frame better? In fact, the rigidity and toughness of the vehicle, the full frame sub-frame is indeed more excellent, but to a certain extent affected the handling of the body, so in order to maintain good control, BMW and the installation of a fixed pole.
The front suspension uses the BMW double wishbone structure, and all are aluminum alloy. This structure of the suspension can move up and down the vertical direction of the wheel, turning the tilt is small, reduce tire wear can also have a better paste effect, so the general high-end cars, sports cars, will use such a structure. But the cost is too high, maintenance is complex, and how to double fork arm adjustment is also very difficult, need a lot of experience data, more like a "metaphysics."
Rear suspension: "aluminum for steel", "plastic link"
The new 5-series rear sub-frame with full frame structure, and also aluminum alloy material. We found that after the rear part of the rear frame is somewhat empty, the feeling may have been some of the original parts here.
After looking for information, the original position can be equipped with a rear wheel to actively control the motor. It is said that the official said that the previous generation 7 series of this "active steering" optional, but the domestic consumer options too little, Chinese consumers do not need this feature. The specific situation is not known, in short, in this most expensive administrative version of 540Li did not see this active rear wheel steering motor.
But the new 5 series of rear suspension changes a lot. First Coilover Shocks of all, the new 5 series after the suspension of the large pieces of aluminum alloy arm, and three aluminum control arm, into a "four steel and one aluminum" combination of pure five-link structure.
But I have a friend may ask, "is the aluminum steel? This is a reduction?" I have doubts this question, but after checking the official picture of the BMW found that the new version of the new 5 Series rear suspension is so designed , And the use of rod material and the same version of the domestic, we are assured that at home and abroad simultaneously! But will stamping steel be better than aluminum? Is the cost of compromise or performance improvement?
But it is interesting that we found the rear suspension control arm connecting rod, even a piece of plastic material seems to link! Hurry back to see the front suspension of the anti-roll bar really have a piece! With the absorption of iron can be adsorbed, but obviously lack of suction, there may be a steel core inside, wrapped in a layer of engineering plastics. However, the plastic link on the rear suspension is not any adsorption force, there may be no steel core.
After all, the control arm and the anti-roll bar connecting rods need to bear a lot of torque and tension, and in general the link is steel or aluminum. So "plastic link" can withstand such a big pressure, we are also puzzling! Want to know the truth and related professional knowledge of friends please background message, educated us!
Summary: BMW's "black technology", it really can not read
From the BMW 5 Series chassis point of view, is indeed the top international! Flat chassis, comprehensive protective measures, especially two large aluminum alloy under the shield, too strong! However, although from the "hem arm" replaced by "pure five connecting rod", but "aluminum for steel" really make some seven or eight, do not aluminum it? Is it just for the weight of steel? In addition, the front and rear suspension of the plastic link is people can not understand, and may be the BMW "black technology" it!
On the BMW 5 Series chassis situation first mentioned here, then the car's interior materials and four-door situation, please pay attention to our follow-up scraping content.
