The pressure drop across a working air filter is often very small – on the order of a few hundred Pascals, especially at low engine RPM – so a pressure sensor for this purpose must be sensitive to very low pressures. In addition, the pressure transducer must be rugged enough to function well under the hood of a vehicle where shock, vibration and high ambient temperatures are common. The modified P55 pressure sensor has been used on military vehicles to measure the pressure drop across the engine air filter.
DAQ Used in Climatic Wind Tunnel for Vehicle Testing
A new model automobile must be thoroughly tested in climate extremes before it is put into production. Will the heater keep the passengers warm in a blizzard? Will the cabin be cool enough in the desert summer? Can the engine cope with temperature extremes? Auto manufacturers now answer all of these questions by placing a new prototype automobile in a climatic wind tunnel.
A climatic wind tunnel is a system that can produce all the expected extremes of temperature, wind, sun, rain and snow on demand. In years past new vehicles were tested in very hot weather like at Tuscon, Arizona in July and in cold weather like at International Falls, Minnesota in February to naturally experience the climate extremes needed for verifying vehicle performance. But the design cycle for new vehicles is much shorter now and the climatic wind tunnel can supply these extremes on demand without the need to wait for a particular season of the year.READ MORE