(Photo by Redteam on Flickr)
Findings in the latest International Journal of Vehicle Design by researcher Inchul Kim will point out the importance of a well-designed spoiler for reduced fuel use. Kim, a researcher from Metacomp Technologies, worked with researchers from the University of Michigan-Dearborn to test out a prototype spoiler designed to reduce drag and lift on vehicles with flat backs. The minivan used in Kim’s tests showed a 5% reduction in drag and an incredible reduction of 100% in lift when the spoiler was attached.
During the development of the test spoiler, Kim and fellow researchers followed three criteria to improve performance in SUVs and minivans. Kim wanted the spoiler to act as a diffuser and create greater pressure on the back of a vehicle than normal to ensure greater wheel contact with the road. The spoiler was also designed to reduce the amount of drag or force moving opposite the vehicle’s motion. The final criterion for this spoiler was keeping lift, or force moving upward from the ground, to a minimum by reducing the prototype’s profile.
The findings indicate that Kim was able to achieve all three measures with resounding success. The minor reduction in drag meant that the minivan had to use less power (read: less gasoline) in reaching the desired speed of 67 miles per hour. The complete reduction in lift kept rear wheels touching the testing surface during the entire process, allowing greater control in case of inclement weather.
While a rear spoiler may seem like an optional extravagance, Inchul Kim has demonstrated its utility in turning traditional vehicles into Earth-friendly rides. Kim’s findings indicate that drag can take up 65% of a vehicle’s energy as it accelerates to 70 miles per hour. If this spoiler can be manufactured for aftermarket use, it will reduce drag’s share of the gasoline and turn minivans into more efficient vehicles.
This research should also be used as the impetus for a total makeover of the auto parts market. The high prices of spoilers, mufflers and exhaust systems do not translate into better fuel performance; instead, they indicate a commitment to engine power and aesthetics. Metacomp Technologies and other research facilities stand on the edge of making safe, green auto parts practical as long as consumers stay concerned with issues of vehicle efficiency.
