Anyone have experience with retrofitting HD emissions systems? If so, would you be willing to be interviewed for a story we're working on?
PG&E would be happy to discuss emissions with you. We are a California based company with pretty stringent emissions requirements. If you're interested, please let me know. I will introduce you to the head our engineering team who specs and purchases all of our equipment. He is also the person who is responsible for keeping us in complaince with all of the regulations.
We just completed retrofitting and replacing a number of trucks over the last 5 years to meet compliance requirements in California. Let me know if I can answer any questions for you.
Question: SCR tailpipe emissions certified at 0.2g/bhp/hr, International EGR at 0.4-0.5 g/bhp/hr. Regardless of carbon credits, how does Cal treat the higher emissions from the EGR engines, since these produce twice the emissions of the SCR engines. What comes out of the tailpipe is important?
Excellent question. And I have no idea what the answer is. Has CARB offered any guidence?
We've done passive and active PM trap retrofits from several manufacturers over the past 6 years. I'd be happy to share any information I have that would be of use.
"Question: SCR tailpipe emissions certified at 0.2g/bhp/hr, International EGR at 0.4-0.5 g/bhp/hr. Regardless of carbon credits, how does Cal treat the higher emissions from the EGR engines, since these produce twice the emissions of the SCR engines. What comes out of the tailpipe is important?
If the emissions are below the established threshold, there are no concerns from CARB's perspective. CARB establishes standards and some vehicles absolutely are cleaner than others but as long as they certify below the standard that is what is evaluated by CARB. It's PASS/FAIL. Kelvin, which engine displacements and emittants are you specifically referring to and I'd be happy to elaborate.
EPA 2010 standards were set at 0.2g/bhp/hr, which SCR meets at the tailpipe. International EGR engines are 0.4-0.5g/bhp/hr
Would Cal standards be same as the EPA @ 0.2 at the tailpipe, or would they accomodate a higher emission @ 0.4-0.5, in the future?
In PG&E's experience with the ARB regarding the EPA 2010 emissions the ARB was only concerned with whether the engine was certified to the EPA 2010 standards. Navistar meets the EPA certification through the use of credits and thus was counted the same as an SCR equipped truck as far as the ARB was concerned. I would still double check with the ARB just to make sure but this is our experience.
I've made two responses to this thread which seem to have diappeared now. I give up.
I'm replying on behalf of FleetAnswers member, rbattersby, who wrote:
"FEL – Family Emission Limit – means an emission level declared by the
manufacturer which serves in lieu of an emission standard for
certification purposes in any of the averaging, trading,
or banking programs."
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