What is TIER?

[CumminsBu]

What is TIER 1,2,etc, what does it mean?

 

[832]

It is the rating system used by the big three to classify the size and capabilities of a supplier. Tier ones for example are: Tower, TRW, Dana, American axle, Magna, Lear, etc.

 

[nickleinonen]

the tier ratings are emissions related... there is tier 0, 1, 2, 3, and soon 4...

Tier 1-3 Standards. The first federal standards (Tier 1) for new nonroad (or off-road) diesel engines were adopted in 1994 for engines over 37 kW (50 hp), to be phased-in from 1996 to 2000. In 1996, a Statement of Principles (SOP) pertaining to nonroad diesel engines was signed between EPA, California ARB and engine makers (including Caterpillar, Cummins, Deere, Detroit Diesel, Deutz, Isuzu, Komatsu, Kubota, Mitsubishi, Navistar, New Holland, Wis-Con, and Yanmar). On August 27, 1998, the EPA signed the final rule reflecting the provisions of the SOP. The 1998 regulation introduced Tier 1 standards for equipment under 37 kW (50 hp) and increasingly more stringent Tier 2 and Tier 3 standards for all equipment with phase-in schedules from 2000 to 2008. The Tier 1-3 standards are met through advanced engine design, with no or only limited use of exhaust gas aftertreatment (oxidation catalysts). Tier 3 standards for NOx+HC are similar in stringency to the 2004 standards for highway engines, however Tier 3 standards for PM were never adopted.



Tier 4 Standards. On May 11, 2004, the EPA signed the final rule introducing Tier 4 emission standards, which are to be phased-in over the period of 2008-2015 [69 FR 38957-39273, 29 Jun 2004]. The Tier 4 standards require that emissions of PM and NOx be further reduced by about 90%. Such emission reductions can be achieved through the use of control technologies—including advanced exhaust gas aftertreatment—similar to those required by the 2007-2010 standards for highway engines.

the on road and off road regs are the same, but one year apart. ie. . onroad truck gets it in 2007, off road gets it in 2008

 

[CumminsBu]

I thought it was an emission standard. In the Diesel Progress Mag. I saw the Fuel pump filtering system that Parker Racor will be coming out. The Title TIER 3 Diesel Filtration, from the article I read in it. That TIER 3 Engines should have a 2 micron filtration to meet the TIER 3 Emission standard?

 

[supersonic]

1Tier \tir\ n. (1569) 1a: a row, rank, or layer of articles; esp: one of two or more rows, levels, or ranks arranged one above another. b: A group of political or geographical divisions that form a row across the map <the southern ~ of states> 2: CLASS, CATEGORY



2Tier vt (ca. 1889) : to place or arrange in tiers ~ vi : to raise in tiers.



So, a tier is just a fancy way of saying a level (ie: level 1, level 2, level 3 etc. . etc... )

 

[nickleinonen]

I thought it was an emission standard. In the Diesel Progress Mag. I saw the Fuel pump filtering system that Parker Racor will be coming out. The Title TIER 3 Diesel Filtration, from the article I read in it. That TIER 3 Engines should have a 2 micron filtration to meet the TIER 3 Emission standard?

this article? [page1]

this article? [page2]

 

[CumminsBu]

this article? [page1]

this article? [page2]

Yes, Thats the article In the Diesel Progress Mag I'm talking about.



Is a 2 micron filtration a requirement for a TIER 3 Emission standard and is that why they titled it TIER 3 Filtration? So the less contamination in the diesel fuel by an absolute 2 microns and 24,000 PSI will equal better atomization in the micro fine injector tips they make now?

 

[rbattelle]

Is a 2 micron filtration a requirement for a TIER 3 Emission standard and is that why they titled it TIER 3 Filtration?

I don't think so. The way I read it is Parker is releasing this 2-micron filtration to support the higher-precision components that will be used in future engines. Precision parts need good, clean fuel.



Tier 3 doesn't require 2-micron fuel filters, but the OEMs do need them to ensure component durability.



That's how I read it, anyway.



-Ryan

 

[nickleinonen]

Tier 3 doesn't require 2-micron fuel filters, but the OEMs do need them to ensure component durability.

that's how i understood it too [i think?]



now, i need to find me a place where to buy this racor fuel system thing... then start figuring out how to plumb it into my fuel system without loosing the oem lift pump... i wonder how high the lift pump pressures will compound to if i use the racor to feed the oem pump?

 

[CWebster]

It is the rating system used by the big three to classify the size and capabilities of a supplier. Tier ones for example are: Tower, TRW, Dana, American axle, Magna, Lear, etc.

That's what I was going to say also... ... never heard of the Tier emission standards... . learn sumthin' new evra day!