Page 43 - ATZ WORLDWIDE
P. 43

FIGURE 4 Active front deflector and active underbody panels (© Magna)




              Once optimal system design, shape and   sions requirements as powertrain
            location are known, proper packaging   improvements and vehicle styling
            can be protected. This allows for opti-    cannot bridge the gap. By incorporat-
            mised travel, which is a key driver in sys-  ing active aero early in the design
            tem function, durability and reliability.    process, automakers and consumers
                                              get the biggest possible benefits
                                              of drag reduction. Magna continues
            CONCLUSION
                                              to lead in this area by providing
            It is clear active aero technologies must     innovative, cost-effective and high-
            be applied to meet future fuel and emis-  quality solutions.




                0.300


                0.295


                0.290
                                                                 11 counts
                0.285
              Coefficient of drag c D  [-]   0.280



                0.275


                0.270


                0.265

                0.260                               Standard vehicle c  = 0.281
                                                                D
                                                    AUP best case c  = 0.270
                                                              D
                                                    AUP 75 % deployed
                0.255                               AGS closed
                0.250
                     40     50    60     70     80     90    100    110   120
                                       Velocity [km/h]

                          Standard vehicle layout (AGS closed)                  FIGURE 5 Wind tunnel results for production vehicle
                          AUP (75 % deployed, AGS closed)                       (© Magna)
            ATZ worldwide  09|2017                                                                           41
   38   39   40   41   42   43   44   45   46   47   48