Particulate filter delete

[Paystar]

How long do you think you could breath diesel soot without permanent effects?

48 years now. And I'm still here in perfect health.

 

[rScotty]

you have the same problem I do...elevation. there is not enough oxygen molecules in the air at that altitude to keep the motor at stoically optimal fuel air ratios. turbos do help with the air problem, but the root cause is too much fuel.

Turn down the fuel a little bit.

I had hoped that the turbo would help with that.
rScotty

 

[Whitbread]

As someone with degrees in diesel technology, alternative fuel technology, and mech engineering, one of the biggest problems in the current diesel emissions battle is the fuel. It's the equivalent of trying to get a pile of wet leaves to burn clean.

The current egr/dpf/scr systems would have zero business on most diesels (especially off highway equipment) if the government would simply mandate a diesel fuel standard equivalent to Propel's HPR diesel. It is 75 cetane rated fuel with an automatic 40+% reduction in greenhouse gases, 15-20% reduction in nox, 35% reduction in particulates, below zero gel point, and is 99% renewable. It's sold on the west coast and I run it every time I can when I'm out there for vacation. It truly is amazing stuff in a late model common rail diesel that's been made to breathe easy.

Butttttt, we'll never see it happen because the oil companies and the gov't are far too cuddly with each other. They both absolutely love the current emissions mandates, more diesel is sold, more fuel taxes collected, more plastic is made/sold for Def cans, more diesel is burned to transport Def, and one of the biggest things is that all the chemical plants across the country now have a waste product (that they used to have to pay to get rid of) that's suddenly clear gold. So everybody but the consumer wins.

In my semi professional opinion, with the fuel mandate, direct injection common rail or electronic unit injection, a DOC, and substainlly more boost at full load from small compounds would make for very low emissions and keep egts low so nox levels would stay low. Mechanical IDI non turbo diesels should go the way of the dinosaurs for anything that a person sits on.

 

[rScotty]

As someone with degrees in diesel technology, alternative fuel technology, and mech engineering.....
.

Great! So what is your opinion on my Kubota M59 making so much stinky soot? It is a 60 hp, 4 cylinder, turbocharged 2007 Interim Tier 4, EGR motor in good condition - but it smokes too much.

Specialized diesel fuel is NOT easily available where we live - in fact it is very rare.

So since this motor is destined to use pump diesel, What would you change, anything? Will the soot turn to carbon and destructively plate onto pistons & valve guides?....or is the soot just a stinky nusiance?
rScotty

 

[finn1]

you have the same problem I do...elevation. there is not enough oxygen molecules in the air at that altitude to keep the motor at stoically optimal fuel air ratios. turbos do help with the air problem, but the root cause is too much fuel.

Turn down the fuel a little bit.

Turbo engines are, to a large extent, of compensating for altitude. To simplify the explanation, the atmospheric pressure drops with increasing altitude, so both the pressure at the inlet to the compressor and the back pressure on the turbine go down, and the rotating assembly spins faster, effectively compensating for the lower atmospheric pressure by producing more boost.

That works fine as long as the compressor doesn稚 cross the surge line, in which case the electronics can be calibrated to reduce injector pulse width, ie trim fuel delivery痴.

A properly calibrated common rail diesel will not emit black smoke at altitude if the calibrat IS done correctly by the engine manufacturer.

Take your tractor to the dealer and have them fix it. Could be any number of things in the fuel or air systems, but I would hook up to the diagnostic port and look at the map sensor first.

For some reason you are overfueling or low on boost.

 

[finn1]

How long do you think you could breath diesel soot without permanent effects?

48 years now. And I'm still here in perfect health.

Another trained health scientist, I am guessing.

 

[Oldoak]

Butttttt, we'll never see it happen because the oil companies and the gov't are far too cuddly with each other. They both absolutely love the current emissions mandates, more diesel is sold, more fuel taxes collected, more plastic is made/sold for Def cans, more diesel is burned to transport Def, and one of the biggest things is that all the chemical plants across the country now have a waste product (that they used to have to pay to get rid of) that's suddenly clear gold. So everybody but the consumer wins.

Like the old adage says: "Follow the money". Which applies to politics as well!

 

[Ortimber]

As someone with degrees in diesel technology, alternative fuel technology, and mech engineering, one of the biggest problems in the current diesel emissions battle is the fuel. It's the equivalent of trying to get a pile of wet leaves to burn clean.

The current egr/dpf/scr systems would have zero business on most diesels (especially off highway equipment) if the government would simply mandate a diesel fuel standard equivalent to Propel's HPR diesel. It is 75 cetane rated fuel with an automatic 40+% reduction in greenhouse gases, 15-20% reduction in nox, 35% reduction in particulates, below zero gel point, and is 99% renewable. It's sold on the west coast and I run it every time I can when I'm out there for vacation. It truly is amazing stuff in a late model common rail diesel that's been made to breathe easy.

Butttttt, we'll never see it happen because the oil companies and the gov't are far too cuddly with each other. They both absolutely love the current emissions mandates, more diesel is sold, more fuel taxes collected, more plastic is made/sold for Def cans, more diesel is burned to transport Def, and one of the biggest things is that all the chemical plants across the country now have a waste product (that they used to have to pay to get rid of) that's suddenly clear gold. So everybody but the consumer wins.

In my semi professional opinion, with the fuel mandate, direct injection common rail or electronic unit injection, a DOC, and substainlly more boost at full load from small compounds would make for very low emissions and keep egts low so nox levels would stay low. Mechanical IDI non turbo diesels should go the way of the dinosaurs for anything that a person sits on.

Interesting, I've never heard of HPR diesel. Thanks for sharing.

 

[Paystar]

Another trained health scientist, I am guessing.

Don't need to be a health scientist. I just wake up every morning and go about my life.

I even touch used oil with my bare hands!!!! OMG

 

[rScotty]

Turbo engines are, to a large extent, of compensating for altitude. To simplify the explanation, the atmospheric pressure drops with increasing altitude, so both the pressure at the inlet to the compressor and the back pressure on the turbine go down, and the rotating assembly spins faster, effectively compensating for the lower atmospheric pressure by producing more boost.

That works fine as long as the compressor doesn稚 cross the surge line, in which case the electronics can be calibrated to reduce injector pulse width, ie trim fuel delivery痴.

A properly calibrated common rail diesel will not emit black smoke at altitude if the calibrat IS done correctly by the engine manufacturer.

Take your tractor to the dealer and have them fix it. Could be any number of things in the fuel or air systems, but I would hook up to the diagnostic port and look at the map sensor first.

For some reason you are overfueling or low on boost.

OK.Thanks for the info. I think your theory is a good one - overfueling or low on boost. What would be the effect of changing each be on engine temperature? Any downside to experimenting?

It would be real nice if I could simply take it to the dealer. Unfortunately my local dealer doesn't have technical people in his service dept. He had one years ago, but the lad went off to college to become a mech engineer. Today if the problem it is more than routine maintenance they are in danger of being stumped. The techs I've talked to certainly don't understand such things at pressure, boost, and the reasons for overlapped cam profiles. As for tools, I doubt seriously that they have any type of diagnostic equipment past a VOM. I know for a fact the dealer doesn't even have a hydraulic flowmeter to work on that all-important aspect of tractors. They are a "if in doubt, replace the part" type of mechanical shop.

What I am saying is that they would be learning, with all that implies. And if someone has to do the learning I'd prefer that it be msyself. At least I then know who is responsible for my own ignorance.
Is the Kubota diagnostic computers a machine or is it just an interface & program like for cars? One that works with any computer. That would make the most sense. How do I obtain one and some service info? Are there independent diagnostic people who might come out and map the sensors?

As much as I would like to just put the problem into someone else's hands, that's just not practical here. What I've done in similar instances in the past is to first study tech manuals, then buy the tools, study the manuals some more, and fix it myself. It's an older Kubota - i.e. pretty simple technology. Can anyone help get me started with this? It's probably something we could all benefit from.

Come to think of it, a TBN forum addressing sensor interface and mapping might be interesting to lots of modern tractor owners - just like tuning carbs was to my generation.
rScotty