Posts Tagged ‘commercial vehicle’
Semi Trailer bumpers are becoming more technologically advanced in an effort to reduce the likelihood of severe injury or death in the event of a rear-end collision. The Insurance Institute of Highway Safety, IIHS, has tested new semi bumpers and determined that new designs are performing much better than previous iterations used on older trailers. The trailer bumpers, known in the industry as ICC bumpers (after the Interstate Commerce Commission) or simply as underride guards, are put in place to protect passenger vehicles against the high-slung blunt edges of a trailer in the event that a passenger vehicle collides with the rear of the trailer. Typically, trailer decks on semi trailers sit at a height of about 48 inches, whereas a typical passenger vehicle’s front clip sits much lower than this. In some cases, the entire front of a passenger car can fit underneath a trailer deck, positioning the deck edge at a point where the vehicle’s occupants’ heads could be decapitated in the event of an accident.
The IIHS has undertaken testing of trailer ICC bars from trailer manufacturers such as Great Dane, Manac, Stoughton, Vanguard, Wabash, Hyundai Translead, Strick, and Utility to find out how new ICC bar configurations fare against three distinct rear-end collision tests. The first test is directed at the full width of the ICC bar, impacted by a vehicle traveling 35 mph. The second test focuses at approximately 50 percent of the width of the ICC bar, again at 35 mph. The third test focuses the impacting vehicle at only the edge of the ICC bar to determine how well it sustains an offset collision.
Despite the improvements in ICC bar technology, government statistics show that commercial vehicle versus passenger vehicle accidents are still on the rise. Even worse, the number of fatalities caused by commercial vehicle crashes has increased between 2011 and 2015 by over 39 percent.
Taken from www.motor1.com
A new technology developed for large semi trucks and other commercial vehicles shows great promise in increasing fuel economy. Semi tractor trailer vehicles, otherwise known as “Big Rigs” are the focus of a new cutting edge product that is being developed to help these large trucks reduce fuel consumption. The product uses plasma-emitting strips along the trailing edges of the big rig’s trailer to help eliminate aerodynamic drag present at the rear of the vehicle. Preliminary studies show that the plasma strips can reduce fuel consumption at highway speeds up to 10%, a significant savings considering there are over 133 million large trucks on the road that could benefit from this technology, and commercial vehicles consume over 60 billion gallons of fuel per year currently.
The plasma strips consist of two electric plates separated by an insulating material that are energized at a high voltage to produce an electric plasma, or fourth state of matter. The plasma works to reduce air turbulence by negatively charging particles in the air, thus reducing the amount of turbulence caused at sharp corners, such as the sharp corners on the edges of a big rig’s leading edges, or the back of a trailer. The company that is developing this technology, Plasma Stream Technologies, has dubbed the system eTail. Plasma Stream Technologies claims that the system is completely safe and has shown great promise in laboratory tests. Real-world testing of the eTail is scheduled to begin in the coming months. Plasma Stream Technologies anticipates that a sellable product will be available to the commercial market by 2018.
A retrofit device is expected to cost around $2000 and provide an average savings of over $8000 for big rigs that travel the roadways consistently. The eTail will be mountable on the rear edge of trailers without any additional modification. A huge benefit of the eTail over conventional aerodynamic aids such as boat-tails is that the eTail does not impede access to the rear doors of the trailers. The eTail will take up only a few inches of space around the rear of the trailer.
Read More: Society of Automotive Engineering Article