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Johnson Matthey Incorporated’s Continuously Regenerating
Technology (CRT®) Particulate Filter Verification Extension for
On-Road Applications. 

The Air Resources Board (ARB) has granted an extension for
Johnson Matthey Incorporated’s CRT® Particulate Filter for use
with certain 1993 through 2006 on-road diesel engines.  The
extension includes an expansion of the system’s engine model year
range, addition of ARB approved Federal certified engines, and
inclusion of duty cycles where the exhaust temperature is above
260 degrees Celsius for at least 20 percent of engine operation. 
The CRT® Particulate Filter system employs a flow through diesel
oxidation catalyst and a wall-flow diesel particulate filter with
a back pressure monitor to achieve an 85 percent reduction in
particulate matter emissions, qualifying it for Level 3 “Plus”
verification.  Specific engine families and conditions for which
the CRT® Particulate Filter system has been approved may be found
in the Executive Order on ARB website at:

http://www.arb.ca.gov/diesel/verdev/companies/jm/crt.htm



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