2019 L6060 Regens

[5030]

Like I stated, according to my Kubota dealer (the owner), he told me the cannister was good for 2100-2300 regens before it needed cleaning or replacement. While not a concern with me because both my M's are Tier 4 interim which basically means no pollution hardware at all, 2100 regens at say 15 hour intervals equals 31,500 run time hours and the motor isn't going to last that long anyway and if it did, you won't own it anyway.

I used the 2100 figure and it's the low side.

My 2004 M9 has 3600 run time hours on it and I farm with it so no way anyone has to be concerned with regens. I suspect the emissions hardware will fail long before the cannister gets loaded with soot.

 

[5030]

I have not read the effect a turbo-charger has on emissions, Tier IV emission control bits and time between regenerations.

Some respondents have turbo engines, some do not.

None. Turbocharging only impacts pre combustion air. Emissions hardware is on the exhaust side, not the intake side.

 

[ptsg]

None. Turbocharging only impacts pre combustion air. Emissions hardware is on the exhaust side, not the intake side.

Doesn't turbos increase the EGTs? Therefore causing a cleaner burn of the exhaust gases? Which would help on the emissions system as is won't plug so much as with natural aspirated engines.

 

[Fallon]

Doesn't turbos increase the EGTs? Therefore causing a cleaner burn of the exhaust gases? Which would help on the emissions system as is won't plug so much as with natural aspirated engines.

A turbo has a compressor wheel on the intake side of things & the power wheel on the exhaust side. So it does mess with both streams. When you compress gasses, they heat up. This generally isnt advantageous for engines, son sn intercooler is used to cool the compressed gasses back towards ambient. In general the more air you can cram into a cylinder the more fuel you can add. The more air/fuel in a given volume you have the more energy comes out. Some as heat.

 

[Hilbilly]

I've already had 3 regens and am 50% towards the next one, at 62 hrs.

Don't turbos ramp up as the load increases? My diesel truck has a boost gauge and I can see the boost increase when I work the engine. So if you are working the engine there would be more boost and more heat, which in theory should reduce the regens. My tractor does very little hard work, which ,Ishtar explain why mine regens more often. One thing I did notice was that each regen so far has been longer than the one before it.

 

[5030]

I've already had 3 regens and am 50% towards the next one, at 62 hrs.

Don't turbos ramp up as the load increases? My diesel truck has a boost gauge and I can see the boost increase when I work the engine. So if you are working the engine there would be more boost and more heat, which in theory should reduce the regens. My tractor does very little hard work, which ,Ishtar explain why mine regens more often. One thing I did notice was that each regen so far has been longer than the one before it.

3 down and 2197 to go.

 

[MHarryE]

Heat during regen - my larger tractors will display the DPF temp. Hard work vs regen temp may add 100 degrees F, raising it from 1000 to 1100 degrees. I had a L5740 that I traded for my L6060. The 2 things most noticeable are improved fuel economy and lack f diesel exhaust odor. Oh, yeah, my L6060 has never set off the smoke alarm system in my home like the L5740. That’s the nuisance effect of having 9 smoke detectors wired together as a system. So regen heat is an issue inside a building because it’s not normal to be running at a power level that would generate so much heat. Regen uses more fuel at low power because of need to heat the DPF from say 600 degrees to 1100 degrees while at full load it might be only from 1000 to 1100 (based on numbers from my tractors). In the case of a L5740 vs a L6060, the old model uses an outdated IDI fuel system while the L6060 uses a very high pressure common rail system that according to Kubota’s charts is significantly more efficient. I assume that’s the reason I use so much less fuel doing the same work. With a few thousand hours now running DPF equipped tractors, I do not understand the issues. I do have 4 non-DPF machines that are no more reliable.

 

[Grumpycat]

A turbocharger, throttle, and EGR are necessary for controlling combustion on modern smogged diesels. Yes, a throttle on a diesel, but it is not under user control. All these are used to keep combustion within necessary ranges to minimize NOx and minimize soot the DPF will have to deal with.

DEF and SCR are required of higher HP to brute force deal with NOx. Oxides of nitrogen are a product of high pressure high temperature combustion. NOx kept gasoline automobile engine compression ratios low in the 1980's until means was found to control.

If anything a turbocharger lowers temperature of exhaust entering DPF. Simple thermodynamics: turbocharger takes energy out of the exhaust to pressurize the intake, therefore the exhaust temperature drops. That is bad for DPF as it needs heat to burn itself clean.

Is not clear to me in tractor applications whether raw fuel is dumped in the exhaust to regenerate the DPF? If not then what really happens when one presses the "Regenerate" button?

The safe way to provide raw fuel to the DPF is with a dedicated injector in the exhaust manifold. Common cheap way to do it is with ECU controlled direct injection squirting in the combustion chamber during an exhaust cycle. Sounds like a brilliant simple solution but too often washes the cylinder walls of lubrication and dilutes engine oil with fuel.

Road vehicles regenerate DPF on the run. Seems off-road should be able to do the same.

 

[deserteagle71]

Road vehicles regenerate DPF on the run. Seems off-road should be able to do the same.

They do. I have never "pushed a button" to do a regeneration on my Kubota. It is all automatic. The only way I know it is happening is when the regen light comes on in the dash. It is completely hands-off. There is nothing I have to do except keep working the tractor...and I don't notice any difference in the way it operates while the regen process is going on.

 

[BRMyers]

They do. I have never "pushed a button" to do a regeneration on my Kubota. It is all automatic. The only way I know it is happening is when the regen light comes on in the dash. It is completely hands-off. There is nothing I have to do except keep working the tractor...and I don't notice any difference in the way it operates while the regen process is going on.

Yep, my regen process occurred while I was moving brush. I had to bump up the RPMs slightly and just kept right on working.