Diesels are dirty - Page 2 - PeachParts Mercedes-Benz Forum

#16 05-05-2009, 12:13 PM

Quote:

Originally Posted by ah-kay

One thing that has not changed is the internal combustion engine design, no one has come up with a better design yet except the wankel engine. But it runs on gas

There is no reason it can't run on diesel. Its just inefficient (gas hog), unreliable (apex seals) and burns lots of oil (to lube those apex seals). Although running on diesel it would probably last longer since the fuel isn't a solvent and it doesn't contact the walls.

ah-kay · #17 05-05-2009, 12:38 PM

Quote:

Originally Posted by ForcedInduction

There is no reason it can't run on diesel. Its just inefficient (gas hog), unreliable (apex seals) and burns lots of oil (to lube those apex seals). Although running on diesel it would probably last longer since the fuel isn't a solvent and it doesn't contact the walls.

Wankel engine is highly efficient as it has no dead piston strokes which does not produce anything. I think the problem is that it can take the compression part as it cannot seal the chamber completely. You are right that it burns lots of oil, may be that is the reason. But it is powerful hp/litre wise. It is enlightening in this forum.

Skid Row Joe · #18 05-05-2009, 01:28 PM

Quote:

Originally Posted by compu_85

$3k doesn't meet my cheap requirement

Coal burning plants in China negate any mods anyone would make.

My E300TD does the smoke deal when romped on, as does my diesel motorcoach.

bart_dood · #19 05-05-2009, 01:44 PM

I might seem unpopular with my view; but I'm glad they are doing something to clean up diesels.
It may not seem like its a big deal here in the US, but if we had as many diesel's here as they have in europe you'd see/smell/breath the problem. With the push for more diesels in the next 1-2 years we may see a huge increase in diesels on the road.
In europe big cities stink of diesel, old buses literally blow soot all over you when they accelerate from traffic lights, these soot particles are so small they pass straight through your lungs and into your bloodstream, depositing cancerous compounds around your body.
I think europe pushed too quickly to move to as many diesels as they did, they should have waited a few years to let the clean-tech evolve.
Even though I like my old diesel, I'm glad they are in the minority due to pollution...

ah-kay · #20 05-05-2009, 01:55 PM

Quote:

Originally Posted by Skid Row Joe

Coal burning plants in China negate any mods anyone would make.

I take exception to this statement as we American pollute more per capita relative to China. But can China do more, of course they can, everybody can for that matter.

http://www.nationmaster.com/graph/env_pol_car_dio_per_cap-pollution-carbon-dioxide-per-capita

I do not use dino-diesel so I can be excused for dirty diesel. But if there is a scrubber that can be installed for under $200 in the tail pipe then I would gladly spend the money.

Skid Row Joe · #21 05-05-2009, 02:07 PM

Quote:

Originally Posted by ah-kay

I take exception to this statement as we American pollute more per capita relative to China. But can China do more, of course they can, everybody can for that matter.

http://www.nationmaster.com/graph/env_pol_car_dio_per_cap-pollution-carbon-dioxide-per-capita

I do not use dino-diesel so I can be excused for dirty diesel. But if there is a scrubber that can be installed for under $200 in the tail pipe then I would gladly spend the money.

I referred to China's coal burning plants -- not their per capita. Everyone knows Chinamen don't own cars......

Come to think of it, depending on their sewer systems.....the average Chinaman probably does create more bodily polution, since we Americans use sanitary toilets, sewage treatment. -Especially since there's billions of 'em......

ah-kay · #22 05-05-2009, 02:14 PM

Quote:

Originally Posted by Skid Row Joe

Come to think of it, depending on their sewer systems.....the average Chinaman probably does create more bodily polution, since we Americans use sanitary toilets, sewage treatment. -Especially since there's billions of 'em......

I suppose members are intelligent enough not to ignore this.

Skid Row Joe · #23 05-05-2009, 02:18 PM

Quote:

Originally Posted by ah-kay

I suppose members are intelligent enough not to ignore this.

Hey, we were talking about air pollution, you brought up the per capita........I just posted the facts........lighten up.....

cmbdiesel · #24 05-05-2009, 02:50 PM

Quote:

Originally Posted by Skid Row Joe

I referred to China's coal burning plants -- not their per capita. Everyone knows Chinamen don't own cars......

Come to think of it, depending on their sewer systems.....the average Chinaman probably does create more bodily polution, since we Americans use sanitary toilets, sewage treatment. -Especially since there's billions of 'em......

Dude, Chinaman is not the preferred nomenclature.

#25 05-05-2009, 02:52 PM

Quote:

Originally Posted by bart_dood

I might seem unpopular with my view; but I'm glad they are doing something to clean up diesels.

Except, that something is nothing. They are taking the same dirty engines and making the exhaust look clean. Never mind that it adds several thousand dollars to the build cost, increases fuel consumption, requires pumping raw fuel into the exhaust to burn off soot, adds heat and pressure stress to the engine and does nothing to make the engine itself cleaner.

The whole DPF and SCR fad is little more than a feel good alternative. What we really need is more time to focus on engine technology instead of rushing tighter emissions laws. That forces designers to divert R&D time/money and make compromises to meet the deadline.

mytmousemalibu · #26 05-05-2009, 03:39 PM

What a load of candy-@ss bull*****

ALL fricking diesels are CLEAN! (minus ones burning a quart of oil per mile, unintentionally)
Lets trade "cleaner" exhaust for horrible MPG and cost. Heck were burnin 3X as much fuel to be "Green" but what the hell, why not?

awsrock · #27 05-05-2009, 05:03 PM

Quote:

Originally Posted by mytmousemalibu

What a load of candy-@ss bull*****

ALL fricking diesels are CLEAN! (minus ones burning a quart of oil per mile, unintentionally)
Lets trade "cleaner" exhaust for horrible MPG and cost. Heck were burnin 3X as much fuel to be "Green" but what the hell, why not?

x100!! Seriously, hybrid drivers fail to realize that they are still using the same amount of fuel as new diesel cars are..engine running or not. It sure says a lot that a 1.x liter engine WITH A BATTERY is only as efficient as a 2.2 CDI. HMM!

Give me diesel exhaust over the crap that comes out of gas engines any day. If the diesel is running correctly, it should be fine. Smelling gas to me is like smelling smoke after you quit..it's gross!

pawoSD · #28 05-05-2009, 05:29 PM

The soot on that filter was pretty much the same thing left over in a fire pit or fireplace after a fire, its just harmless carbon/ash. Not very good to breathe....but not exactly damaging to the environment in general.

79Mercy · #29 05-05-2009, 05:37 PM

I'd rather drive the W115 than the VW TDI.

pwagon · #30 05-05-2009, 05:41 PM

Quote:

Originally Posted by pawoSD

The soot on that filter was pretty much the same thing left over in a fire pit or fireplace after a fire, its just harmless carbon/ash. Not very good to breathe....but not exactly damaging to the environment in general.

It's not the environment that can be damaged by soot, it's people. The main concern with dirty diesel is particulate pollution in cities where the soot will hang in the air and be breathed in. You can blow as much soot as you want out in the country, it won't harm a soul.

I'm surprised no one's posted a pic of a clogged TDI "EGR" where it's supposed to burn off the soot but instead it builds up...