DPF and Emission Controls vs Models

[jeff9366]

In the 1960's I travelled to New York, Los Angeles and San Francisco regularly on business. The air was so polluted I was ill by the end of almost every trip. Now there are, I am guessing, twice as many vehicles on the road and when fire smoke is not bad, one can breathe reasonably well.

I could not disagree with you more.


Tier IV technology tractors emit only about 1% of the cancer causing diesel soot emitted by a pre-Tier IV tractors.

 

[tractortroof]

Stricter Tier IV off-road diesel engine emission reduction standards phased in dealer tractor inventory during 2009 - 2012, impacting tractor prices.

Tier IV emission standards require tractor manufacturers to add or revise pollution reduction technology on new tractors generating over 19 kW power = 25.4794 horsepower.

What about BX2670 and 2670-1 for example that are close to that threshold?
Some manufactures can meet Tier IV requirements without a Diesel Particulate Fillter on low engine displacement, relatively high rpm engines powering ~2,000~ pound bare weight tractors up to 27 horsepower.

Sufficient tractor weight is more important for most tractor applications than increased tractor horsepower.

DPF is used by the majority of tractor manufactures for emissions control on OVER 24.4794 horsepower tractors.
Tier IV technology complicates the engine and exhaust package and is a significant cost factor. Tier IV technology tractor emit only about 1% of the pollutants emitted by a pre-Tier IV tractor.

Diesel Particulate Filter (DPF) captures exhaust particulates (soot) in a ceramic matrix. When tractor engine runs sufficiently hot, accumulated particulates burn off periodically without operator intervention. If engine is not run continuously hot long enough to burn off particulates, diesel soot accumulates in the matrix. Once heavy soot accumulates in DPF the tractor forces soot clearance with the tractor parked and throttle open to about 2,200 rpm for about sixteen minutes, which makes the DPF REALLY HOT to burn off all accumulated soot. Burning off accumulated soot, either during operation or parked is called REGENERATION.


Regeneration is an infrequent DPF event with my Kubota three cylinder, 37-horsepower engine. Generally once every sixty engine hours. (Very consistent in Florida due to warm weather.)

60 hours X 60 minutes = 3,600 minutes.

16 regeneration minutes /3,600 = .00444 = 4/10s of 1% of engine time is consumed during parked regeneration.

Fuel cost for sixteen minute parked regeneration @ 2,200 rpm ~~$1.00.

Forty percent of my regenerations occur during operation, sixty percent parked.



The average residential tractor operates eighty engine hours per year, according to industry surveys.

3,000 hours DPF Life / 80 hours = 37.5 years of residential use prior to DPF replacement.

Diesel Particulate Filter supersedes tractor muffler.
At some point in time DPF needs to be replaced.
At some point in time tractors with mufflers need the muffler replaced.

The often repeated idea that these systems are trouble free is so false that it needs to be called out as an outright deception. Anyone who has been writing these things for the long term knows that they are extremely problematic and the only “reliable” thing about them is that you can count on them failing within 5-7 years. Repairs are not affordable and many desire to bypass the system when faced with the cost. My Kubota regens every 16 hours or so, I run it at very high rpm.

 

[Ortimber]

As I get older, I seem to have less tolerance when it comes to “dirty” air. The truth is, it’s much more pleasant running tier 4 (and 5) equipment. With 1,000s of hours under my belt running said equipment, I’ve never had a single emissions related failure.

2023 Cummins tier 5

 

[Rdrcr]

In the 1960's I travelled to New York, Los Angeles and San Francisco regularly on business. The air was so polluted I was ill by the end of almost every trip. Now there are, I am guessing, twice as many vehicles on the road and when fire smoke is not bad, one can breathe reasonably well.

I could not disagree with you more.


Tier IV technology tractors emit only about 1% of the cancer causing diesel soot emitted by a pre-Tier IV tractors.

There becomes a point of diminishing returns.

I lived and commuted in Los Angeles. I was originally thrilled with the EPA and pollution control and regulations. It did make a difference in the air quality.

Now, they’re overreaching, taking options away from the consumer and making purchasing and financial decisions for us by causing most engine driven machines to be way more expensive than they should be or not an option at all.

Mike

 

[SDT]

There becomes a point of diminishing returns.

I lived and commuted in Los Angeles. I was originally thrilled with the EPA and pollution control and regulations. It did make a difference in the air quality.

Now, they’re overreaching, taking options away from the consumer and making purchasing and financial decisions for us by causing most engine driven machines to be way more expensive than they should be or not an option at all.

Mike

Agreed.

The mission of the EPA as originally enacted was acheived decades ago but federales are relentless, constantly expanding their baliwick to assure job security and endlessly growing budgets.

When was the last time any federal agency told the taxpayers that their mission had been achieved and it was time to dissolve?

 

[Paystar]

In the 1960's I travelled to New York, Los Angeles and San Francisco regularly on business. The air was so polluted I was ill by the end of almost every trip. Now there are, I am guessing, twice as many vehicles on the road and when fire smoke is not bad, one can breathe reasonably well.

I could not disagree with you more.


Tier IV technology tractors emit only about 1% of the cancer causing diesel soot emitted by a pre-Tier IV tractors.

Don't come to my barn then. Every time I fire up my old iron my eyes water with tears of joy....but you might think they are watering from all the fumes, LOL

If it don't smoke, it's broke.

 

[ptsg]

I've said it before and say it again. These new tractors these days burn so clean already, at what point does it really need the DPF? Specially this smaller tractors, lets say 70HP and lower.

I bought my tractor new in 2017, at the time there wasn't a requirement for DPF under 50HP. Mine is 35HP so I'm good there. This tractor uses a mechanically injected engine and the only smoke or smell I get is just the normal puff during start up. Nothing more, not even under full load.

I can only imagine a common rail will only do better than that.

 

[Rdrcr]

^^^^
To top that off, aside from the initial startup, my Turbocharged L2501 runs cleaner at 44HP than it did at 25HP, go figure!

Mike

 

[SDT]

^^^^
To top that off, aside from the initial startup, my Turbocharged L2501 runs cleaner at 44HP than it did at 25HP, go figure!

Mike

Be interesting to hear how you could know that.

 

[Rdrcr]

^^^^
We have some diesel emissions testing equipment at my work (automotive dealership). It’s not the same equipment certified by the EPA for testing but, definitely provides a rough estimate.

Mike