The whole EGR "business"

im not talking about the coolant passages doogie, you gotta be that most annoying hyperboleisizg forum tard ive ever seen

 

yes well the wavefronts of the modulus of the brisance will, exnumerate the .00006 gram of rare metals plated on the catalyst screen
i thin koyu mean flamefront not wavefront, thers not enought plat or pall in there to make a safety pin, its all plated

 

the dpf isnt the same as the catalyst system the dpf is just a big filter for particulates

cutn paste is the antichrist , ive finally reasoned it out
NIOW I MUST BLAST CUTNPASTE WITH CAPT KIRKS BAMBOO BLACKPOWDDER CANNON ( THE ONE HE USED ON THE gORN

 

Now you can get the problems from SCR. Clogged SCR catalyst = 5000 euros, broken dosing unit = 1500 euros, liquid you can buy in expensive 10 litre plastic cans, those cans everywhere polluting enviroment, frozen system in winter = no power, etc.

Thank Oilcompanies this sh#t is now used everywhere!

 

egr reduces combustion temps which in turn reduces nox. scr burns all the nox in the exhaust pipe

and all the emissions crap is directly derived from auto sources , alot of it they even licensed the auto patents

 

lol pyrometer, you mean egt?

try the wiki articles in the us next time

 

Ok... let's look at what is really going on. EGR displaces air in the cylinder. This reduces the temp of combustion (via less oxygen which is needed for the combustion to occur) and generates more unburned fuel particulates (soot). Also, since the majority of air is actually Nitrogen, this reduced temp controls the amount of Nitrogen and Oxygen that is bonded in the combustion process. With the newer SCR trucks, the NOx is not "burned" off. It is subjected to a chemical reaction by using the urea that causes the nitrogen and oxygen bonding that has occured in combustion to separate like they are in normal atmosphere. The newer SCR trucks then can have the EGR function reduced (and probably eliminated alltogether), which will generate higher cylinder combustion temps, less soot, and more NOx. Now the SCR breaks down the NOx molecules back to Nitrogen and Oxygen. And by having less soot, the DPF will not have to regen as often.

They should have gone to SCR right out of the gate back when emissions standards were first implemented in '03. They could have avoided much of the EGR/DPF nonsense that has cost trucking a grip of money in cost and downtime. Then they could have played a little with DPF to control soot issues that were left. The engines could have been tuned to max effeciency and it would have been a win/win.

NOx is the primary cause of smog, or that brown cloud, that was so prevalent around big cities. I will have to admit, that reducing NOx is a great idea, whether one takes the global warming stuff seriously or not. At least the level of smog is reduced. They just went about reducing it all backwards.

 

Oil Cos and Car Cos basically belong to the same CROOKS that own investment Banks(You know Goldman Sachs/Rockefeller/The FED etc). Are you saying SCRs cost 5000 euros or $7500 and if so how long can you go between major purchases of vaseline? Tell me it idn't so!

 

You can't get a clogged SCR catalyst in the US due to the DPF being upstream, that is unless you ignored all all the warning signs of a DPF melting down (including the engine shutting off), in which case the entire system is shot and you'll be out $10k plus whatever on the side of the truck you melted/burned off.

The engines should shut themselves off before you get a DPF meltdown though.

As for the conspiracy thread... yeah it doesn't work like that... regulators tell manufacturers what to do, then the manufacturers say they can't do it, and then the date gets set. When legislators weigh the difference between monuments melting due to acid rain vs truck emissions...guess who loses?