Installing Diesel Exhaust Fluid System

[jyoutz]

I just wonder if all the diesel fumes from Asia ever make their way through the jet stream to AK, or if they simply hover only over Asia.

I don’t know, but I do remember the 1970s with brown air and acid rain where you live. I do remember a few rivers catching fire. I do remember not wanting to go to a large metropolitan area because the air made my eyes sting and caused choking coughs. Now none of that is the case anymore. So cleaner vehicles and fuel did make a big difference in the U.S. yet China still has filthy air.

 

[The Evil Twin]

Come find my non compliant homeowner tractor. Good luck state EPA.

 

[lugbolt]

in 2011 I had to go to a "class" I guess you could say, it was more of a pretty technical set of classes that I called "school" (aka training for work). This dealt with lawn equipment and side-by-side UTV's specifically. One of the mowers they built used a little perkins (aka "cat") 3 or 4 cylinder (depending on the HP, one was 28hp the other 30hp). As we all know, emissions laws changed and by 2013/14 "most" engines over 25hp had a DPF. There are different ways to accomplish the same thing but the DPF and EFI was and still is the least expensive way to do it. Note that the EPA (and probably carb) doesn't necessarily mandate specifically the DPF or SCR system, rather it sets a set of rules and laws that dictate how much and what kinds of gases can be emitted from the exhaust system. How the manufacturers chose to meet that set of laws and rules is up to the manufacturer, EPA really doesn't care too much about how, just that it does.

Anyway, on the mowers, the cost of the mower build was to increase about $7500. Of that, $1800 was retrofitting the engine with the correct DPF and DOC which would meet the epa's mandates, and that $1800 would not include retrofitting a reformer system which was about 2 grand total. The rest of it would have been the actual testing and certification process as we were told.

By adding $7500 to that mower, it would have put it WELL beyond what the competitor's comparable mower would sell for, so rather than retrofit, they just quit making them altogether.

Sounds crazy that the state of cali would mandate retrofitting, but I wouldn't put it past them. They are stupid, and they do not care about people. That's why the entire state is so expensive to live in, and from what I am told by the neighbor who moved from there, why many folks are moving out.

 

[Fishhook]

I just wonder if all the diesel fumes from Asia ever make their way through the jet stream to AK, or if they simply hover only over Asia.
[/QUO

re: Do you know how I would go about reprogramming the ECU?

Sure , I've reprogrammed microcontrollers every day since about 1986ish.

1st. determine the make/model of the micro
2nd.read the machine code out of it
3rd, edit as required
4th.'burn' the new program into the micro
5th. test and repeat 2-3-4 until you're happy..
It is that easy...

Now the 'challenge' is that 99.44% of those that want to do this haven't got a clue as to what 'machine code' is, have testing facilities for the sensors, or enough chemical/electronics educations to actually make the code changes.

#1 is kinda easy,especially if the chip's ID is on it.
#2 is tricky. Most MFRS do not allow chips to be read(though there are 'tricks of the trade'.
#3 the complicated part,1/2 science,1/2 art/ 1/2 luck getting the 'numbers ' right
#4 the piece of cake...takes less than a minute
#5 boring and frustrating,'revising' and 'tweaking' code can be 50-60-100 revisions

Obviously there are 'cheats', like taking the code from a similar engine already using DEF/DPF. Reverse engineer to get the algorithms( 'math' ) and adjust as required. Again, once you have the machine code, it's fairly straightforward.
Biggest 'cheat' is to buy a 'tuner'. An external micro that talks to the original ECU and changes 'parameters' or 'settings'.

Do you know if Kubota uses C as the language for programming the ECU?

 

[Fishhook]

I don’t know, but I do remember the 1970s with brown air and acid rain where you live. I do remember a few rivers catching fire. I do remember not wanting to go to a large metropolitan area because the air made my eyes sting and caused choking coughs. Now none of that is the case anymore. So cleaner vehicles and fuel did make a big difference in the U.S. yet China still has filthy air.

Did you live in China? I only visited Beijing once - the weather was fantastic when I was there, but that was back in May 2012.

 

[jyoutz]

Did you live in China? I only visited Beijing once - the weather was fantastic when I was there, but that was back in May 2012.

No. I do recall seeing the filthy looking brown air during the Bejing olympics.

 

[Runs With Scissors]

Come find my non compliant homeowner tractor. Good luck state EPA.

Be careful of what you say...."Big Brother" is everywhere.

It would be easy to set up a "Snitch line"......Just sayin....

 

[PaulL]

Do you know if Kubota uses C as the language for programming the ECU?

It's immaterial whether they use C. It'll be compiled before loading into the ECU. So in the ECU, it'll be machine code. Unless you have the original C source code (or whatever other language they use), you have no way to modify it.

In theory you could extract the code from the ECU, then decompile it, then modify it. This is a thing that relatively large aftermarket tuning companies spend hundreds of thousands of dollars doing in cars, with an expectation of selling enough units to recoup their costs. Using specialists who know how to do the job.

Your chances of retrofitting DEF and recalibrating your ECU are somewhere between zero and none.

You could retrofit DEF without recalibrating the ECU. That means forgoing DPF (no regens and fewer sensors), and basically just dumping ammonia into your exhaust at a level that is approximately right, and broadly hoping it works.

The first advice you were given was the correct advice. Sell your tractor and buy one with the emissions controls you want. If you particularly don't want someone else to have your tractor with smelly emissions, junk your old tractor and buy one with the emissions controls you want.

There is absolutely no way you can economically retrofit. Even if money was no object, the questions you're asking indicate that you don't have the technical knowledge to do the job, and that knowledge would take a couple of years of learning to acquire. I have 30 years in the IT industry, and I know enough to know that I don't know how to do it. I can write C (and about 30 other languages), and at one point could write and read 68000 assembler. I still wouldn't take on that task.

 

[The Evil Twin]

Be careful of what you say...."Big Brother" is everywhere.

It would be easy to set up a "Snitch line"......Just sayin....

True. They did it with the Covid.

 

[Speed25]

Modifying the ECU qualifies as tampering with emissions equipment, federally illegal on most all vehicles. Ironic in the light of what you're attempting...

In the car/truck world, you can update the drivetrain to a newer, more modern one legally, and that might be the easiest option here too. Take an existing engine, harness, instrument cluster, sensors, ECU and emissions systems and retrofit them into your current tractor.

 

[lmichael]

Yep

True. They did it with the Covid.

Yep. Just look how the guv in MN handled it. We even had "snitch" lady here in my little village and subdivision. She was going around taking photos of the cars in people's driveways. Then she'd publish them on Nextdoor app, and send to village police and county sheriff.
She did it to my neighbor. He was having his daughters along with all the little grandkids over for his wife's 65th (or 70th forget which), birthday. And we caught her out in front of his house shooting pictures. Levels of creepiness were getting off the charts.

 

[GreensvilleJay]

re: Modifying the ECU qualifies as tampering with emissions equipment, federally illegal on most all vehicles.

And yet 'tuners' are being sold, every hour of every day, online at least. It'd be easy for 'them' to find out who'se buying them.

As Paul says ,probably 'C'. I flip between in and Assembler depending on the scope of the project and the mood I'm in. he's right...NOT economical though it could be an entertaining,low cost hobby.
Years ago,yeesh 3 decades, I reverse engineered a propriatory communications module. Cut the cost from $200 down to $75 and made several 'enhancements',including making it hacker proof.

I doubt EPA can require 'retrofitting' of existing equipment to conform to NEW laws, otherwise you wouldn't see period correct muscle cars on the roads ! I think whatever year the engine is, it has to meet THAT years rules ?