Have we been doing it wrong? High rpm's bad when not needed?

[5030]

Kukje engines won't go limp

You will as you get old.....

 

[TractorNoob85]

I don't even follow what people are talking about anymore. We go from talking about working rpm's, to DPF's, to transaxle's, to limp Kukje's! This thread is out of control!

 

[bvanek]

government mandates usually mean cost, lack of choice, and the science doesn't really matter when the experiment has a predetermined outcome. When a particular government determines how you make your product, innovation loses out and most consumers carry the fallout via their pocketbook and subsequent lack of choices.....

particulate fallout (almost all of this falls back to earth) is obviously not a greenhouse gas.....a re-gen produces greenhouse gases ..... go figure. Everyone wants clean air and water but the industry gets hijacked by politically motivated mobs of disingenuous bureaucrats and you have problems that most citizens don't deserve.....Rural people somehow always get displaced by the whims of suburbia and metropolitan mandates. There is an education to be had out there....All of us have some degree of ignorance, but reason and common sense usually fill in our shortcomings.

 

[Hermio]

https://imgur.com/SV8D1zR

This graph shows soot production as a function of power and rpm. BMEP which is effectively torque is on the vertical axis and rpm on the horizontal axis. You can see there is a sweet spot of low soot right in the range where its putting out some power at a range of operating rpm. I don't know what engine its for or how much it changes for different engines but at least it's an idea of how it is for one engine.

You can tell that letting it idle with no load is going to generate many times more soot that working it.

Oddly, there is a second sweet spot at 3000 rpm with little or no load.

 

[Hermio]

I don't even follow what people are talking about anymore. We go from talking about working rpm's, to DPF's, to transaxle's, to limp Kukje's! This thread is out of control!

Apostrophes make a noun possessive, not plural.

 

[Hermio]

government mandates usually mean cost, lack of choice, and the science doesn't really matter when the experiment has a predetermined outcome. When a particular government determines how you make your product, innovation loses out and most consumers carry the fallout via their pocketbook and subsequent lack of choices.....

particulate fallout (almost all of this falls back to earth) is obviously not a greenhouse gas.....a re-gen produces greenhouse gases ..... go figure. Everyone wants clean air and water but the industry gets hijacked by politically motivated mobs of disingenuous bureaucrats and you have problems that most citizens don't deserve.....Rural people somehow always get displaced by the whims of suburbia and metropolitan mandates. There is an education to be had out there....All of us have some degree of ignorance, but reason and common sense usually fill in our shortcomings.

I don't buy the human GHG causing climate change idea. But soot is harmful to breathe, and it can travel a very long way before it drops to the ground. I am talking about more than 1000 miles. That is why cities get foggy from emissions and smoke from forest fires makes the sky hazy several states away from the fire. But rural diesel emissions are a very small part of that, especially if they are properly tuned.

 

[bvanek]

I don't buy the human GHG causing climate change idea. But soot is harmful to breathe, and it can travel a very long way before it drops to the ground. I am talking about more than 1000 miles. That is why cities get foggy from emissions and smoke from forest fires makes the sky hazy several states away from the fire. But rural diesel emissions are a very small part of that, especially if they are properly tuned.

I wasn't defending the harms of particulate fallout.....as in which comes first, the "man made Co2 causing forest fires" or a much more complicated natural cycle with the sun at the center?

 

[Hermio]

I wasn't defending the harms of particulate fallout.....as in which comes first, the "man made Co2 causing forest fires" or a much more complicated natural cycle with the sun at the center?

I don't want to derail the thread by talking about climate change. But I will add this food for thought. Mars has been seeing global warming of similar magnitude to Earth, when adjusted for distance from the sun. No human GHG there! Seems it must be driven by solar output.

 

[ning]

I don't want to derail the thread by talking about climate change. But I will add this food for thought. Mars has been seeing global warming of similar magnitude to Earth, when adjusted for distance from the sun. No human GHG there! Seems it must be driven by solar output.

 

[Hermio]

View attachment 877901

There has been much published about this. A small sample: NASA Astrobiology