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The California Air Resources Board (ARB) has verified the RYPOS
DPF/ULETRU Diesel Particulate Filter System for use with
Thermo-King multi-temp Transport Refrigeration Units (TRU)
equipped with model year 2003 and newer off-road diesel engines
rated at up to 50 horsepower. 

The Rypos DPF/ULETRU is a Level 3+ diesel emission control
strategy (DECS), capable of reducing emissions of particulate
matter (PM) by 85 percent or more without increasing nitrogen
dioxide emissions more than 20 percent of total nitrogen oxides. 
The RYPOS system consists of a diesel oxidation catalyst (DOC),
an active exhaust filter and an automatic filter regeneration
system.  Specific engine models and families that may qualify are
listed in the Engine Family List at ARB's Verification Procedure
Website for the Rypos DPF/ULETRU at: 
http://www.arb.ca.gov/diesel/verdev/companies/rypos/uletru.htm
(to be posted in the next few days).

Rypos has completed all of the requirements for full
verification, including extensive field demonstrations under
worst-case conditions, showing reliable backpressure control.  
To qualify for retrofit with the Rypos DPF/ULETRU, TRU engines
must be maintained in accordance with the engine and original
equipment manufacturers’ specifications and meet all of the
pre-installation compatibility assessment criteria established
for the Rypos DPF/ULETRU.  Other terms and conditions for which
the Rypos DPF/ULETRU has been approved may be found in ARB’s
Executive Order at ARB's Verification Procedure Webpage for the
Rypos DPF/ULETRU at: 
https://www.arb.ca.gov/diesel/verdev/companies/rypos/uletru.htm
(to be posted in the next few days).
Additional information about the Rypos DPF/ULETRU may be found at
Rypos’ webpage:  http://www.rypos.com/resources-2/brochures/

As indicated above, the Rypos DPF/ULETRU is a Level 3+ DECS,
which meets ARB’s TRU Regulation’s Ultra-Low-Emission TRU
(ULETRU) in-use performance standard.  All model year (MY) 2008
and older TRUs and TRU gen set engines must meet ULETRU now.  MY
2009 TRU engines must meet ULETRU by the end of 2016.  Engine
repowering is no longer be a compliance option for MY 2008 and
newer engines because replacement engines that fit and perform
are no cleaner than the old in-use engines being replaced. 
Retrofitting with a Level 3 VDECS is a compliance option that is
less costly than replacing the entire unit.

Where can I get more information?

For general information about the TRU Regulation, the TRU Website
is at:  http://www.arb.ca.gov/diesel/tru/tru.htm

ARB’s Verification Procedure Website is at:
http://www.arb.ca.gov/diesel/verdev/verdev.htm

If you have questions about TRU compliance or registration in
ARBER, please call the TRU Help Line at 1-888-878-2826 or call
1-916-327-8737.



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