The ID.7: sophisticated aerodynamics for long range and high efficiency
With limousines like the ID.7, the body shape accounts for about 50 per cent of the Cd value. The wheels and tyres influence about 30 per cent, the underfloor 10 per cent, and the functional openings through which air flows to the radiators in the vehicle front end, for example, also 10 per cent. The fact that the new ID.7 is the most aerodynamic ID. model so far can be seen at first glance when looking at the silhouette of the vehicle, which is almost five metres long. Volkswagen designer Daniel Scharfschwerdt says: “When designing the ID.7, there was a greater focus on aerodynamics than for practically any other model. This can be seen in the low front end, the flowing transition into the bonnet, and the fast windscreen. The coupé-like roof form and the tapering rear end are also designed for ideal aerodynamic performance.”
Even in the early stages of product development, intensive work was carried out on the exterior design, as well as on the underbody, wheels and other fine details. The prerequisite for optimal results is close collaboration between developers and designers. Stephan Lansmann, project engineer responsible for ID.7 aerodynamics: “We strive for ideal solutions in an iterative process, which includes regular consultation between the Development and Design departments. There are many small steps here that pay off in the end. Numerous computer simulations for flow calculation are complemented by tests in a wind tunnel as part of this process.”
The aerodynamic strengths of the ID.7
The ID.7 has an almost completely closed underbody. This is supplemented by newly developed wheel spoilers on the front wheels. These guide the air along the wheels under the vehicle with minimum turbulence. Air curtains at the sides of the front bumper direct the air around the vehicles front end with minimum loss. The flared side sills prevent the air from flowing into the underbody area and shield the rear tyres from air flowing onto them. In addition, small spoilers and trim panels guide the flow of air on the underbody.
