2016 BMW 7 Series with BMW EfficientLightweight Carbon Core
Channel: Javier Mota
Date: 2015-08-29

BMW EfficientLightweight: reducing weight by up to 190 pounds with Carbon Core
The BMW EfficientLightweight concept allows the new BMW 7 Series line-up a 190 pounds weight reduction in comparison to its predecessor. Groundbreaking Carbon Core passenger cell technology is the key element on the body structure. Thanks to its composite construction featuring CFRP, ultra-high-tensile steels and aluminum, the intelligent body design succeeds in increasing the strength and rigidity of the passenger cell while also bringing about a substantial reduction in vehicle weight. By using a hybrid construction of CFRP with ultra-high-tensile steels for structural elements, such as those found in the B-pillars, the design of the sheet-metal components can be adapted to save weight.
 
The Carbon Core body is based on technology transferred from BMW i car development. The all-new BMW 7 Series is the first ever vehicle in which mass produced CFRP is used in combination with steel and aluminum. The BMW Group’s expertise in producing carbon fiber in the manufacturing of high-volume vehicles is unrivalled in the automotive sector. The new BMW flagship model pioneers the creation of new possible applications for this high-tech material.
 
The lightweight design concept also entails the use of aluminum for specific sections of the body and chassis. For the first time doors and the trunk lid are made of aluminum. Taking suspension comfort and dynamic handling to new levels, the rigorous implementation of lightweight design measured at the suspension, brakes and wheels, reduced the unsprung masses by as much as 15 percent. Lightweight bonding technologies have been employed with near-source thermal and acoustic shielding for the engine, which enables the overall volume and weight of the insulating material to be reduced. The innovative insulation concept has the additional effect of further improving acoustic comfort.
 
As a result, the vehicle’s center of gravity has been lowered. Following BMW tradition the weight distribution remains 50 : 50 between the two axles allowing for perfect balance of the chassis. BMW EfficientLightweight technology helps to consolidate its lead with dynamic handling and comfort.