How it works: Aerodynamics
Air resistance has a big impact on fuel consumption. By reducing drag, Volvo
Trucks’ latest aerodynamic improvements also save fuel and costs.
Because of the rough nature of the truck’s underside, it is beneficial to avoid an excessive amount of air flow and divert the accelerated high-speed flow to the sides of the vehicle instead. This is the function of the optimised front spoiler, while also allowing for adequate ground clearance.
The purpose of the air deflectors is to steer oncoming air flow away from the front edges of the trailer, and create a smooth transition between the tractor and the trailer, with flow being close to the surrounding air flow velocity. The corner area of the deflectors has been given particular attention and been further optimised.
Wheel arch area
The wheel house area is a key source of aerodynamic loss since the highly turbulent, swirling flow of low speed from the rotating wheel meets the more high velocity laminar structure of the flow outside. In order to minimise these losses, wheels and wheel house perimeters are better matched to optimise each set of wheels.
The purpose of mudguards and mud flaps is to protect other vehicles from water spray when driving in wet conditions. However they are also a source of aerodynamic losses. They should only be wide enough to fulfil their function. The image above shows how high velocity air streaks pass this area. By optimising mudguard and mud flap width, fuel economy can be improved.
EURO 6 STEP C ENGINE UPDATES
With the new updates, the D11 and D13 now have the same basic architecture, such as the current injection system and turbo solution. The D16 is also built with the same architecture, but has a completely different turbo solution with two-step turbo charging, so that it reaches higher horsepower.