DPF issue

[Peter 315]

Keep in mind that Mahindras engines are meeting tier 4 emissions by running hotter and recirculating exhaust gases back into the intake. For engine longevity, in my opinion, regen is the way to go. Perhaps not, but time will tell.

I said that before on another thread about mahindras and was told it was false:confused3:

 

[deserteagle71]

Can't speak to the Kioti but on my Kubota, if I'm running the engine up over 1500 rpm and it needs to regenerate, a light comes on in the dash that tells me regeneration is happening - just a warning to NOT shut down the engine at this time. If I'm running the engine below about 1500 rpm and it needs to regenerate, a blinking light in the dash with an up pointing arrow reminds me to up the rpms. Once the rpm is up in the proper range the regeneration happens seamlessly - if it weren't for the light in the dash, I wouldn't know it is happening at all. There is an option mentioned in the manual for a "Parked" regeneration - meaning that if for some reason you had to postpone a regeneration, you can then get have the regeneration done by parking the tractor and hitting the "Parked regeneration" button on the dash. The ECM takes over from there and increases the rpms until the regeneration is done.

 

[xcgreene]

I said that before on another thread about mahindras and was told it was false:confused3:

Mahindra uses common rail fuel injection, which injects at a higher pressure than typcial cam driven pressure lift injectors. Along with higher pressure, Mahindras system also utilises multiple injection events to try and burn as much of the problem emmissions up during combustion. Even with this, EGRs are still necesarry in their engines, these things in turn make the enigne run hotter than if it were consuming fresh air at all time.

Heat is what burns up our problem emissions in the first place. Its also why folks running their tractors loaded up most of the time see little regen time than those of us who putter around.


So if you said that Mahindra engines utilize EGR systems and run hotter, you were correct.

 

[Turbys_1700]

New Holland Workmaster series utilize the same process as the Mahindra utilizing a DOC along with direct injection. I understand that the current EPA emissions limits allow this technology on engines uner 75 HP. Over that other systems are required in addition to DPF's and regeneration. I have had zero issues with my New Holland.

 

[DK35vince]

Keep in mind that Mahindras engines are meeting tier 4 emissions by running hotter and recirculating exhaust gases back into the intake. For engine longevity, in my opinion, regen is the way to go. Perhaps not, but time will tell.

I think International tried something similar with their MaxxForce engines with BAD results.
Like you said, Time will tell.

 

[cphilip]

Even though I do not have the regen on my 2610 I still run the RPMs when working at 2000 rpm. Higher if PTO engaged of course. Even without regen being necessary you still have to keep the engine burning up deposits and running clean.

 

[MickeyDBC]

I have 54 hours on my 7320 and have yet to see (or maybe notice) a regen cycle. The majority of the hours are at PTO speed and a pretty good load on it (discing, mowing, or seeding) with probably 15 to 20 at lower speeds and loads doing loader work or idle. Does this sound right?

 

[hillwood]

Mahindra uses common rail fuel injection, which injects at a higher pressure than typcial cam driven pressure lift injectors. Along with higher pressure, Mahindras system also utilises multiple injection events to try and burn as much of the problem emmissions up during combustion. Even with this, EGRs are still necesarry in their engines, these things in turn make the enigne run hotter than if it were consuming fresh air at all time.

Heat is what burns up our problem emissions in the first place. Its also why folks running their tractors loaded up most of the time see little regen time than those of us who putter around.


So if you said that Mahindra engines utilize EGR systems and run hotter, you were correct.

CRDI.. common rail direct injection... It's been around for almost 20 years..
Every diesel engine over 30 HP is using it today.

 

[marchanna]

Yup. 1998 Mercedes released their first CDI models.

Common rail is more efficient and can produce more power, but unfortunately most the benefit is ruined by EGR. And it’s EGR that necessitates a DPF.

The best thing you can do for your Diesel engine is delete the EGR. The higher compression and increased soot causes more fowling of the engine oil. Whereas the increased combustion temperature caused by deleting it is a non-issue for engine temps, because diesel is still far more thermally efficient than gasoline.

 

[hillwood]

When the regeneration light comes on.. I park the tractor and let it do a complete cycle...
Park the tractor.. let it idle... Start the regeneration and wait... It will rev up and do it's thing.. It will idle down when it is done..
My last one took over a half hour...
You are asking for trouble if you don't let it do a complete cycle.