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The term monocoque is frequently misapplied to unibody cars. Commercial car bodies are almost never true monocoques but instead use the unibody system (also referred to as unitary construction, unitary body–chassis or body–frame integral construction), [ 14 ] in which the body of the vehicle, its floor pan, and chassis form a single ...
Vehicle structure has shifted from the traditional body-on-frame architecture to the lighter unitized/integrated body structure that is now used for most cars. [10] Integral frame and body construction requires more than simply welding an unstressed body to a conventional frame. In a fully integrated body structure, the entire car is a load ...
The BMW i3 electric car is one of the rare modern passenger cars with a separate body and frame design (2013). Body-on-frame is a traditional motor vehicle construction method whereby a separate body or coach is mounted on a strong and relatively rigid vehicle frame or chassis that carries the powertrain (the engine and drivetrain ) and to ...
Initially designed to improve passive safety, the system has subsequently been developed to electronically integrate every aspect of car's active and passive safety features. RISE is a monocoque body system that combines an energy-absorbing front and rear section with a strong, rigid occupant cell to provide protection in the event of an accident.
The LB744's monofuselage combines new and old carbon manufacturing processes to make one seriously stiff chassis.
The first production car with carbon-fiber monocoque design was the MCA Centenaire. Now many modern sports cars have carbon-fiber monocoque cells, and some big car manufacturers have also started applying the same in passenger cars like the BMW i3 .
As a semi-monocoque they are still a form of body-on-frame construction, rather than a monocoque or unibody where the bodyshell and chassis are integrated into one component. Although both body and platform chassis are each made from similar pressed steel panels welded together, they were often bolted as the final two units and so may still be ...
The configuration of a car body is typically determined by the layout of the engine, passenger and luggage compartments, which can be shared or separately articulated. A key design feature is the car's roof-supporting pillars , designated from front to rear of the car as A-pillar, B-pillar, C-pillar and D-pillar.