Sexton

Automotive Emission Test Chambers

These chambers are used to test automotive vehicles, or major4 components such as gas tanks, to assure they meet various governmental regulations such as EPA, CARB and EU regarding emissions.  New requirements and the severity of future emission reduction requirements will require new or modified test systems.

The following types of chambers are required to fulfill emission test specifications:

• SHEDs

These chambers are utilized for diurnal emission tests.   They are offered in Drive-in, Micro and Mini sizes.  The new emission requirements will outmode current SHEDs because they cannot meet the "0 emission" requirement with reduced chamber background emission.

To achieve a "0" emission SHED a number of issues had to be addressed and a major design executed.  A sampling of the redesign included: new heat exchanger material and fabrication method (no copper); hermetically sealed motor shafts; no lubrication of any moving parts; special material for inflatable door sealing; all lighting removed from SHED interior; all internal cable covered with special Teflon coating; no anti-slip floor; all polish finish stainless steel surfaces, and more. 

Vehicles are not operated during these tests.

• Running Loss SHEDS

These chambers require operation of the test vehicle to measure running losses and requires a dynamometer, wind speed fan, fuel tank conditioning and connections for make-up carburetor air, exhaust air, etc.

• Cold CO Chambers

These chambers measure vehicle CO exhaust emissions while the vehicle is operated on a dynamometer

• Cold Start Chambers

The new regulations to perform cold start up tests at 7^°C requires a considerable higher cold start capacity.  This is not only true for complete vehicle test chambers, but also for smaller chambers designed exclusively for engine tests. 

• SFTP Chambers

The EPA’s Supplemental Federal Test Procedure (STPF) is the most complex chamber.  It not only requires the chamber test systems of the Running Loss chamber but also includes a solar simulation system.  

Let Us Help You!

Because of the complexity of these chambers, Sexton is prepared to consult on preparation of custom specifications including installation requirements.  We can also obtain quotations and further assist clients. We also supply product support, parts and service.

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