Diesel car emissions
#1
Emissions wise, how do diesel cars compare to their petrol counterparts? I know that diesels are more efficient and emit less Co2.
However the E320 CDI got 1/10 for the EPA pollution score. Is that because diesels emit too much particulate matter?
Thanks.
However the E320 CDI got 1/10 for the EPA pollution score. Is that because diesels emit too much particulate matter?
Thanks.
#2
Originally Posted by black1444' post='259789' date='Mar 25 2006, 08:13 AM
Emissions wise, how do diesel cars compare to their petrol counterparts? I know that diesels are more efficient and emit less Co2.
However the E320 CDI got 1/10 for the EPA pollution score. Is that because diesels emit too much particulate matter?
Thanks.
However the E320 CDI got 1/10 for the EPA pollution score. Is that because diesels emit too much particulate matter?
Thanks.
#3
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New BMW diesel has the particle filter and that really makes the engines clean.
The mirco particles are the worst that diesel engines produces!
I.e. the new 520d only produces only Co2 158 g/km, and thats great.
Compare to the 523iA and 530iA (224) and the 550iA (260).
The 530dA produces Co2 200 g/km.
The mirco particles are the worst that diesel engines produces!
I.e. the new 520d only produces only Co2 158 g/km, and thats great.
Compare to the 523iA and 530iA (224) and the 550iA (260).
The 530dA produces Co2 200 g/km.
#4
Originally Posted by ImolaRedM' post='259791' date='Mar 25 2006, 01:19 PM
If you use Biodiesel you can greatly cut all other emissions with the exception of NOx.
#5
Biodiesel has different viscosity and is a bit more agressive to gaskets etc.
Also, the composition of NOx, CO, and unburned hydrocarbons is different for a Diesel. When we test mateials in my lab, we use different amounts of these gases. In principal, the Diesel exhaust is closer to the lean burn gasoline exhaust that to the stoichometric exhaust. Diesel exhaust also has more organic compounds including hydrocarbons such as aldehydes, ketones, benzene, etc., which need to be oxidized.
In addition, Diesel engine exhaust has a lower temperature than gasoline engine exhaust, which leads to light-off issues etc.
Also, the composition of NOx, CO, and unburned hydrocarbons is different for a Diesel. When we test mateials in my lab, we use different amounts of these gases. In principal, the Diesel exhaust is closer to the lean burn gasoline exhaust that to the stoichometric exhaust. Diesel exhaust also has more organic compounds including hydrocarbons such as aldehydes, ketones, benzene, etc., which need to be oxidized.
In addition, Diesel engine exhaust has a lower temperature than gasoline engine exhaust, which leads to light-off issues etc.
#6
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Seems that you, drjochen, are into pollution and chemtech
Is that the reason why you will trade in your 545i to a 530i?
Anyway, the finest thing with diesel engines is that they burn energy
much more efficient than gasoline engines ever.
But as said they produce a vast amount of toxics of which the partcile filter
can handle the most?
A fact is also that in the US the diesel fuel is not enough raffinered to meet the
standards of modern turbo-diesel cars.
Maybe now when the gas prices will go over $3 / gallon, the diesel fuels and pump
stations will come the the new continent?
But probably not - yet :thumbsdown:
Is that the reason why you will trade in your 545i to a 530i?
Anyway, the finest thing with diesel engines is that they burn energy
much more efficient than gasoline engines ever.
But as said they produce a vast amount of toxics of which the partcile filter
can handle the most?
A fact is also that in the US the diesel fuel is not enough raffinered to meet the
standards of modern turbo-diesel cars.
Maybe now when the gas prices will go over $3 / gallon, the diesel fuels and pump
stations will come the the new continent?
But probably not - yet :thumbsdown:
#7
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My Ride: F11 535i M-Sport,, Silver, Black Leather, LED Adaptive headlights
Model Year: 2015
Engine: N55
The US is more concerned with NOx than CO2.
Until either that changes and they start to worry about CO2, (probably when Florida floats off into the carribean), or Diesel engines can meet the NOx emmision regs, sooner than the above I should think, Diesel is unlikely to take off in the US.
Then all they have to worry about is the tax level!
Until either that changes and they start to worry about CO2, (probably when Florida floats off into the carribean), or Diesel engines can meet the NOx emmision regs, sooner than the above I should think, Diesel is unlikely to take off in the US.
Then all they have to worry about is the tax level!
#8
Originally Posted by Ricracing' post='259956' date='Mar 25 2006, 03:33 PM
Seems that you, drjochen, are into pollution and chemtech
Is that the reason why you will trade in your 545i to a 530i?
Anyway, the finest thing with diesel engines is that they burn energy
much more efficient than gasoline engines ever.
But as said they produce a vast amount of toxics of which the partcile filter
can handle the most?
A fact is also that in the US the diesel fuel is not enough raffinered to meet the
standards of modern turbo-diesel cars.
Maybe now when the gas prices will go over $3 / gallon, the diesel fuels and pump
stations will come the the new continent?
But probably not - yet :thumbsdown:
Is that the reason why you will trade in your 545i to a 530i?
Anyway, the finest thing with diesel engines is that they burn energy
much more efficient than gasoline engines ever.
But as said they produce a vast amount of toxics of which the partcile filter
can handle the most?
A fact is also that in the US the diesel fuel is not enough raffinered to meet the
standards of modern turbo-diesel cars.
Maybe now when the gas prices will go over $3 / gallon, the diesel fuels and pump
stations will come the the new continent?
But probably not - yet :thumbsdown:
The Diesel is not much worse than the Otto engine in terms of emissions except the particulate.
We really need to separate CO, NOx, HCs, etc. from particulate. Two different things, two different ways to treat (the first with a catalytic converter, i.e., storage and reduction system or selective catalytic reduction system) and the second with either filters or catalytic filters.
#9
Originally Posted by drjochen' post='259989' date='Mar 26 2006, 12:45 AM
Indeed, I am a Chemical Engineer and I actually do research in automotive exhaust.
The Diesel is not much worse than the Otto engine in terms of emissions except the particulate.
We really need to separate CO, NOx, HCs, etc. from particulate. Two different things, two different ways to treat (the first with a catalytic converter, i.e., storage and reduction system or selective catalytic reduction system) and the second with either filters or catalytic filters.
The Diesel is not much worse than the Otto engine in terms of emissions except the particulate.
We really need to separate CO, NOx, HCs, etc. from particulate. Two different things, two different ways to treat (the first with a catalytic converter, i.e., storage and reduction system or selective catalytic reduction system) and the second with either filters or catalytic filters.
-Otto motor which higher consumtion, but less dangerous (?) emissions
or
-Dr. Diesels motor whit better efficiency, but more dangerous (?) emissions
Or all this is political?!
Skaffa
#10
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My Ride: F11 535i M-Sport,, Silver, Black Leather, LED Adaptive headlights
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Engine: N55
Apparently, if you could stop all the cows in the world from farting, the reduction in Methane emissions would enable us to keep puffing CO2 into the air from our cars without worry.
Bound to be an easier solution than getting the USA to reduce use of cars.
Bound to be an easier solution than getting the USA to reduce use of cars.