Pemex Diesel Fuel Update
There is some important new information to share regarding the availability of ULSD (Ultra Low Sulfur Diesel) in Mexico. Over the past month (February 2017) I kept pestering a half dozen public rel...
Forum Discussion
Moisheh, that DPF did NOT get plugged because of the fuel. There was a problem with all 2007.5, 2008, 2009 and some 2010 diesel emissions systems in the way that regeneration cycles were programmed.
Manufacturers during their testing hadn't taken into account what would happen if regeneration cycles were constantly interupted by the engine being turned off, or by insufficient rpm to maintain temperature in the exhaust system in stop/go traffic. These situations happened with vehicles like airporter busses, vehicles used for take-off power operations, and short haul delivery vans, some logging trucks, etc.
In those early years, when a regen was interupted, it did NOT resume when the vehicle was restarted, which over time resulted in more and more compacted deposits in the DPF. That has now been corrected, and to the best of my knowledge all manufacturers now use timer based regeneration cycles that resume the process at the next start if they were interupted by a key off. Typically the timer will be set to the range of 35 to 42 minutes.
Compacted DPFs are pretty much a thing of the past.
Manufacturers during their testing hadn't taken into account what would happen if regeneration cycles were constantly interupted by the engine being turned off, or by insufficient rpm to maintain temperature in the exhaust system in stop/go traffic. These situations happened with vehicles like airporter busses, vehicles used for take-off power operations, and short haul delivery vans, some logging trucks, etc.
In those early years, when a regen was interupted, it did NOT resume when the vehicle was restarted, which over time resulted in more and more compacted deposits in the DPF. That has now been corrected, and to the best of my knowledge all manufacturers now use timer based regeneration cycles that resume the process at the next start if they were interupted by a key off. Typically the timer will be set to the range of 35 to 42 minutes.
Compacted DPFs are pretty much a thing of the past.
