VORTEX GENERATOR DRIVERS
History has shown that devices that need driver intervention - such as first generation trailer tails - are not effective solutions as drivers do not deploy them 100% of the time. Aerodynamic devices must work without driver intervention.However, the primary motivation for aerodynamic technology investment remains a business one, with fleets demanding a two year or less payback for technologies. California’s existing CARB rules, which are linked to EPA SmartWay designated technologies, are already influencing some investment decisions. The rules have been released but await litigation proceedings before they can be implemented at this time. The Greenhouse Gas Phase II emissions rules are likely to significantly influence trailer aerodynamic technology adoption. GHG Phase II and CARB rules will drive much greater adoption of trailer aero devices in the near future, taking them from being add-on options to being standard equipment. Regulations will drive greater adoption.Although most fleets can measure tractor efficiency very closely, they do not have the tools to monitor the trailer efficiency at all.
VORTEX GENERATOR FULL
Advances in test and analysis continue to be made, but the tools available today tend to report performance judged under controlled, focused, operating conditions rather than representing the full range of operations possible in industry. As these products have matured, so has the industry’s understanding of the need for improvements in the way fuel efficiency performance is measured and allocated. A range of products are now readily available that offer proven savings. But the standardized test methods are directionally useful in evaluating different devices and combinations of devices. Performance of any device is subject to many variables and each operator will likely have their own experiences. Performance for each fleet is difficult to determine.These include trailer-to-tractor ratio which limit the miles per trailer, some cases of the trailer aerodynamics purchaser not buying the fuel and lastly, devices should be driver passive: no driver interaction is required to deploy or stow. There is a widespread recognition of the further improvements and efficiency gains that stand to be achieved in trailer aerodynamics.
Other devices are maturing but need continued development to improve their total cost of ownership. Skirts have become lighter, less expensive and more robust improving their payback.
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