Climatic Wind Tunnel

Christer RamdénChrister Ramdén Head of Vehicle Performance Testing

Scania Technical CentreEverything in one place

Scania’s R&D focus

New segments GrowingFuel efficiency and uptime

Environmental performance

New segments and applications

Growing volume in Asia, Africa, Eurasia

Climatic Wind Tunnel

Unique facilityq y

Climate testing for all markets/weather conditions – warm, cold, rain, humidity

R titi t ti Repetitive testing conditions

Fuel efficiency uptime Fuel efficiency, uptime, driver environment, emissions

Facility overview

Nozzle size 13 m² Bus and truck testingWind speed 0-100 km/hDyno performance ± 800 kW, ± 120 kNTemperature -35ºC / +50ºCHumidity 5-95% RH

Rain and soiling (UV-chemical) Aeroacoustic testing Snow and solar simulation Emission analysis

Operating conditions – Rain

Water intrusion in air intake Wiper functionWiper function ACC performance during rain, humidity Mist removal

Operating conditions - Snow

Snow clogging on front lids Snow intrusion in air intakeSnow intrusion in air intake Snow clogging of filters Wiper and defroster functions

Operating conditions – Sun

Radiation intensity: 400-1,100 W/m² Radiation of front, roof and cab sidesRadiation of front, roof and cab sides Cloud and tunnel functions Testing of ACC performance in trucks

Soiling test

0.5% fluorescent added to rain water Contamination of sides, door handlesContamination of sides, door handles Windscreen and side window visibility Soiling of exterior driving mirrors

Aero acoustic testing

Wind noise can be measured during stable and repeatable Wind noise can be measured during stable and repeatable conditions, also with a lateral wind flow.

Requirement: Background noise level ≤76 dB(A) at 90 km/h. The acoustic treatment solution includes circuit wall liningThe acoustic treatment solution includes circuit wall lining, turning vanes and baffles, and test section lining.

Application testing

Trucks, buses and tractors Variable wheel base settingVariable wheel base setting FCD for improved air flow Supply of different fuels

Advantages of Climatic Wind Tunnel

Higher quality in new productsg q y p

Shorter project lead times

Better fuel economy and lower Better fuel economy and lowerenvironmental impact

Improved driver environmentd b tt f tand better safety