Need to see it out in real world first
6.7 PSD power rating. Suck it cummin lovers
1 - 20 of 31 Posts
then why do you always seem to boast about the newer diesel engines?
Just the newer ford diesel engines. They are not worth a fuck.then why do you always seem to boast about the newer diesel engines?
Selective Catalytic Reduction.
Basically, there will be another aftertreatment device in the exhaust system. Exhaust will go from the turbo outlet to the DOC (diesel oxidation catalyst) / DPF (diesel particulate filter) unit just like it does now.
After that it will flow through a "decomposition tube". In the decomp tube the DEF (diesel exhaust fluid) will be injected. The DEF is a 32.5% urea solution (w/ de-ionized water). In the decomp tube the exhaust heat will break the DEF down into ammonia.
This ammonia will travel with the exhaust gasses down to the SCR unit where it will hit more catalyst beds and turn NOx into N2 (nitrogen) and H2O (water).
Expect DEF usage to be around 1-2% of fuel usage.
DEF freezes at 11*F so the tank will have to be heated with engine coolant. DEF breaks down at 120*F, so prolonged storage in hot climates will reduce it's effectiveness... and there will be NOx sensors in the exhaust feeding back to the ECM to monitor this. You can not fill the DEF tank with any other fluids, as the ECM knows the capacitance of DEF and will derate the engine if it detects anything else (or if you run out).
Right now DEF is running around $8/gal in bulk but the price is expected to drop to $2-3/gal later this year as the distribution infrastructure expands.
Here's a bad scan of the label on a drum of DEF:
(Yes, it's a Cummins/Fleetguard product, but it's for other engines. The 6.7 Cummins Turbo Diesel in the Dodge will not need it)
(click)
What a clusterfuck!Selective Catalytic Reduction.
Basically, there will be another aftertreatment device in the exhaust system. Exhaust will go from the turbo outlet to the DOC (diesel oxidation catalyst) / DPF (diesel particulate filter) unit just like it does now.
After that it will flow through a "decomposition tube". In the decomp tube the DEF (diesel exhaust fluid) will be injected. The DEF is a 32.5% urea solution (w/ de-ionized water). In the decomp tube the exhaust heat will break the DEF down into ammonia.
This ammonia will travel with the exhaust gasses down to the SCR unit where it will hit more catalyst beds and turn NOx into N2 (nitrogen) and H2O (water).
Expect DEF usage to be around 1-2% of fuel usage.
DEF freezes at 11*F so the tank will have to be heated with engine coolant. DEF breaks down at 120*F, so prolonged storage in hot climates will reduce it's effectiveness... and there will be NOx sensors in the exhaust feeding back to the ECM to monitor this. You can not fill the DEF tank with any other fluids, as the ECM knows the capacitance of DEF and will derate the engine if it detects anything else (or if you run out).
Right now DEF is running around $8/gal in bulk but the price is expected to drop to $2-3/gal later this year as the distribution infrastructure expands.
Here's a bad scan of the label on a drum of DEF:
(Yes, it's a Cummins/Fleetguard product, but it's for other engines. The 6.7 Cummins Turbo Diesel in the Dodge will not need it)
(click)
1 - 20 of 31 Posts
