Mexican Diesel Fuel/Sulfur Effects Update
Much to my distress I just learned here in the Southern Baja that the owner of a late model GM diesel pickup paid almost $3,000 to ship his truck back to the USA when it went into limp mode (5 mph) in...
Forum Discussion
Sorry for more confusion. I use the word sulfur rather than soot - or getting into the whole particulate thing. A DPF filters soot - particulates - unburned from the engine. Sulfur is one of the particulates. Today's DPFs used on today's diesel vehicles sold for use in the US are designed to work with fuel containing 15ppm or less. They are not designed to work with fuels containing higher amounts of sulfur. This would cause more soot which the DPF is not designed to work properly with. I use the word sulfur because that is the content of the fuel we are talking about when we talk about LSD or ULSD fuel - with ULSD being the fuel with 15ppm sulfur today's DPFs on US built vehicles are equipped with. I also assumed that it was understood that the DPF is part of the exhaust system and never intended to imply it is a fuel filter. It filters particulates from the exhaust after the fuel is burned. Sorry to assume everyone knows this. As above I reference websites where people can learn about this. I post web addresses and places where people can learn more. And I ask questions. So if people take the time to look up the web addresses I posted previously you will learn what I am trying to say and the reasons for my questions. I have stated many times that I know nothing about this.
HERE ARE SOME MORE WEB ADDRESSES WHERE MORE INFORMATION MIGHT BE FOUND....
http://en.wikipedia.org/wiki/Diesel_particulate_filter
New particulate filters can capture from 30% to greater than 95% of the harmful soot. With an optimal diesel particulate filter (DPF), soot emissions may be decreased to 0.001 g / km or less.
The quality of the fuel also influences the formation of these particles. For example, a high sulfur content diesel produces more particles. Lower sulfur fuel produces fewer particles, and allows use of particulate filters. The injection pressure of diesel also influences the formation of fine particles.
Filters require more maintenance than catalytic converters. Ash, a byproduct of oil consumption from normal engine operation, builds up in the filter as it cannot be converted into a gas and pass through the walls of the filter. This increases the pressure before the filter. Warnings are given to the driver before filter restriction causes an issue with drive-ability or damage to the engine or filter develop. Regular filter maintenance is a necessity.
http://www.dieselpowermag.com/tech/1107dp_dpf_the_time_bomb_under_your_diesel
As the exhaust gases pass through this filter, emissions of particulate matter (PM), carbon monoxide (CO), and hydrocarbons (HC) are trapped in the filter and reduced by more than 90 percent. This trapped diesel particulate matter (DPM) settles inside the filter walls until temperatures reach levels that allow for DPM combustion. The process of combusting these trapped particulates inside the filter without an intolerable buildup of engine backpressure is called filter regeneration. People who think of this as a self-cleaning (we did) for the DPF are practicing a little wishful thinking. To truly clean the DPF involves taking the filter out of the exhaust system and putting it in a special cleaning chamber.
NOTE - these are not my words - I did not write this - it is Copy & Paste from the websites - and I posted more previously. So here are a couple of pertinent words if you missed them......
The research I have done has shown me that there are DPFs made for fuel containing up to 2,000ppm sulfur - BUT these are NOT the type of DPFs used on US built vehicle which only have the 15ppm filters.
HERE ARE SOME MORE WEB ADDRESSES WHERE MORE INFORMATION MIGHT BE FOUND....
http://en.wikipedia.org/wiki/Diesel_particulate_filter
New particulate filters can capture from 30% to greater than 95% of the harmful soot. With an optimal diesel particulate filter (DPF), soot emissions may be decreased to 0.001 g / km or less.
The quality of the fuel also influences the formation of these particles. For example, a high sulfur content diesel produces more particles. Lower sulfur fuel produces fewer particles, and allows use of particulate filters. The injection pressure of diesel also influences the formation of fine particles.
Filters require more maintenance than catalytic converters. Ash, a byproduct of oil consumption from normal engine operation, builds up in the filter as it cannot be converted into a gas and pass through the walls of the filter. This increases the pressure before the filter. Warnings are given to the driver before filter restriction causes an issue with drive-ability or damage to the engine or filter develop. Regular filter maintenance is a necessity.
http://www.dieselpowermag.com/tech/1107dp_dpf_the_time_bomb_under_your_diesel
As the exhaust gases pass through this filter, emissions of particulate matter (PM), carbon monoxide (CO), and hydrocarbons (HC) are trapped in the filter and reduced by more than 90 percent. This trapped diesel particulate matter (DPM) settles inside the filter walls until temperatures reach levels that allow for DPM combustion. The process of combusting these trapped particulates inside the filter without an intolerable buildup of engine backpressure is called filter regeneration. People who think of this as a self-cleaning (we did) for the DPF are practicing a little wishful thinking. To truly clean the DPF involves taking the filter out of the exhaust system and putting it in a special cleaning chamber.
NOTE - these are not my words - I did not write this - it is Copy & Paste from the websites - and I posted more previously. So here are a couple of pertinent words if you missed them......
For example, a high sulfur content diesel produces more particles. Lower sulfur fuel produces fewer particles, and allows use of particulate filters.
The research I have done has shown me that there are DPFs made for fuel containing up to 2,000ppm sulfur - BUT these are NOT the type of DPFs used on US built vehicle which only have the 15ppm filters.
