Quote:
Originally Posted by oil pan 4
See remove the DPF, EGR and EGR cooler, sell it to some sucker in NY or CA that has to have one and your problems go away.
New Mexico air isn't clean. Its full of dirt.
Mother nature is our main air polluter.
If you have ever smoked and live beyond the age of 65 here you are going to get COPD.
If there is a DPF doing its thing near you it is producing colorless odorless diesel particulate in the 1 to 2 micron range it defeats all your body's senses and defenses. And you unknowingly breath the particulate deeply into your lungs.
The DPF does eliminate most of the diesel particulate but what it does produce is exceptionally bad for you.
With a non emissions controlled diesel the particulate is big, from 20 to 250 micron is what I am hearing. You see it you smell it and react to it you don't breath it in, unless you really like the smell of burned diesel.
You want to know what the scarry thing is, when bad guys are trying to make dry powder type chemical or biological weapons they are trying to get the particulate in the 1 to 2 micron range, any smaller than that and you breath it in and right back out, any larger than 2 microns and your body stops most of it.
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DPFs eliminate the gross bulk pollution. You have to start there. And you are correct that they allow/create sub micron range particulates. But so do direct injection gas engines which are now coming under scrutiny. There are after treatment solutions to trap them. Diesel and gas engine controls will become more alike as time goes by.
Studying and understanding the combustion process to eliminate the particulate formation in the first place is intensifying.
The whole field of health vectors and population studies is well beyond the scope of this forum but bears the understanding that small particulates are all around us but do not negatively affect us. What is created in diesel and direct injection gas engines unfortunately are carcinogenic and/or biological mutagens. Much of this understanding came from tobacco health affects. As we all know, over a period of time small amounts of tobacco smoke can affect us negatively. Even minuscule amounts of second hand smoke. I think it is prudent to control the emissions of combustion particulates. The future health effects can only be extrapolated but look to be as massive a problem as the burden of tobacco.
This discussion is well past the OP. But it does make the point that an efficient diesel is a non-smoking diesel. That smoke represents lost fuel energy. For now we have to trap it and destroy that smoke. But, the real goal is to use that smoke in the engine cylinders.