DPF Regeneration driving me crazy...

[Jstpssng]

It never was about 'pollution', its all about control, and when they come out with 'electric tractors' it will become clear.....

You keep telling yourself that.

 

[mo1]

Actually I think that happened because diesel was a lot cheaper than gasoline. I think the low sulfur mandates came along because of the increased use of diesel with small trucks.

The low-sulfur mandate apparently had a couple of reasons it came into effect. The largest one from what I can tell is that it was necessary to reduce the amount of sulfur in the exhaust in order to prevent the DPFs that were about to be mandated in 2007 for on-road diesel engines due to particulate matter limits from plugging excessively quickly. (Oil specifications were also changed at that time with the API CJ-4 spec to limit the amount of sulfur and sulfated ash, for the same reason.) It also appears to have allowed for decreased sulfur dioxide emissions as well. If you are wondering why the specific emissions regs came into being in the first place, that really is a political question, but I suspect it probably is mostly due to larger commercial trucks and heavy equipment more than light trucks due to the quantity of fuel they consume in total, and thus the amount of emissions they create.

Curious what folks' manuals say for operating RPMs during regens. Kioti says 1,800 rpm (or above): this is hardly "high" RPMs. In 720 hrs I think I've had two parked regens* (one for sure [when relatively new]- other one might have been that I had to get out of the tractor to do stuff -usually stay in the tractor and keep working). Can't say how often my Kioti regens, but it's rather infrequent and I usually still have work I can do.

* I'm wanting to say that the parked-regen process actually cycles engine RPMs a bit, and it's way that you know it's different from a passive regen.

Regarding ULSD, reduction in sulfur is actually better for engines. See: sulfuric acid.

The manual for my tractor recommends not shutting off the tractor during an automatic active regeneration, otherwise use as you normally would. It does say the throttle needs to be at idle (below 900 RPM) before pushing the switch for a parked regeneration, and then the ECU will automatically change engine speed, the first change being an increase in speed to 1800 RPM. I have never had a parked regeneration. Mine has done an automatic active regeneration every 100.0 hours, and I just keep on doing what I was already doing. I've never had to do a parked regeneration.

ULSD has its pluses and minuses. Negatives are lower lubricity, higher price, greater ability to attract water, shorter shelf life, slightly reduced energy content, and increased static charge build-up. Pluses are typically the hydrotreating process increases cetane rating a little, less sulfuric acid ends up in the engine oil which sometimes allows for a longer drain interval, and non-emissions engines stink noticeably less when burning ULSD versus when they burned higher-sulfur diesel in the past.

 

[Fixastuff]

It never was about 'pollution', its all about control, and when they come out with 'electric tractors' it will become clear.....

I'm still pissed I can't dump used crankcase oil in the creek anymore. Control!

 

[Reddogs]

Well shut my mouth.......... https://solectrac.com/cet-electric-tractor

 

[Gee Ray]

They said this one would work also. But it did not.

 

[3 Horse Ranch]

I'm still pissed I can't dump used crankcase oil in the creek anymore. Control!

That's a terribly wasteful thing to do. Be a real conservationist and spread it on your driveway for summer dust control.

 

[Dwellonroof]

I'm still pissed I can't dump used crankcase oil in the creek anymore. Control!

We use to just put it back in the ground where it came from.

 

[workinonit]

If you said that on tik tok or instagram you would have 90% of the readers confused. They think gas comes from a pump at the gas station and oil comes from Jiffy Lube.

 

[Hay Dude]

All this gets you to thinking…you have a tractor with a DPF that already suffers with higher fuel consumption. Then you have to run it at higher RPM to protect the DPF from clogging with soot, increasing fuel consumption even more.
Is this conserving fossil fuels? Or causing more pollution by needing to drill for more fossil fuel?

 

[Jstpssng]

All this gets you to thinking…you have a tractor with a DPF that already suffers with higher fuel consumption. Then you have to run it at higher RPM to protect the DPF from clogging with soot, increasing fuel consumption even more.
Is this conserving fossil fuels? Or causing more pollution by needing to drill for more fossil fuel?

My 1984 L275 (27hp) Kubota burned 2 quarts of diesel per operating hour. My 2015 L3301 (33hp) Kubota burns 1/2 gallon of fuel per operating hour. I can barely tell the difference in fuel consumption.