Recent Topics
Hanging 3rd - Honda Automatic
by RevelationLion
10 minutes 58 seconds ago
Oil Interval Mountain Driving Road Trip
by Yup
44 minutes 38 seconds ago
Giant VW Beetle....
by mattwithcats
58 minutes 58 seconds ago
anyone have the 12 ton HF press?
by joel95ex
Today at 12:27 PM
BMW final drive 75W90 GL5. Supertech semisyn OK?
by David_g
Today at 12:00 PM
Shuffle your feet!
by Stelth
Today at 11:44 AM
BMW Hexhead gearbox oil? Redline shockproof?
by David_g
Today at 11:11 AM
Meg's Ultimate vs Collinite 845/476s?
by MisterBen
Today at 10:17 AM
Why do factory filters get such a bad rep?
by MisterBen
Today at 10:09 AM
Strange oil filter experiance. I'm stumped.
by callbay
Today at 10:06 AM
WiFi Extenders
by GGorman04
Today at 09:54 AM
Need Help getting on track/ 07 Honda Pilot
by 07Piloteer
Today at 09:23 AM
Newest Members
RM53119, Ctanke, jractk, LatitudeDancer, AKN
58647 Registered Users
Who's Online
69 registered (andrewp1998, bdcardinal, Astro_Guy, 4WD, 97f150, -SyN-, 3 invisible), 2172 Guests and 7 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
58647 Members
66 Forums
252449 Topics
4140518 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Page 1 of 4 1 2 3 4 >
Topic Options
#3262914 - 01/28/14 05:37 PM Urea injection for diesel
wemay Offline


Registered: 04/04/12
Posts: 5965
Loc: South Florida
Why do some vehicles require this, i.e., Chevy Cruze Diesel and others do not, like the Jetta TDI? What is the main purpose?
_________________________
16 Toyota Corolla LE 1.8 CVT
Toyota Genuine Motor Oil 0W20 | OEM | 10K

13 Hyundai Santa Fe Sport 2.0T
Valvoline 5W30 | VO106 | 3K

Top
#3262922 - 01/28/14 05:45 PM Re: Urea injection for diesel [Re: wemay]
Quattro Pete Offline


Registered: 10/30/02
Posts: 31798
Loc: Great Lakes
Urea is used to help meet more stringent emissions requirements. TDIs will soon utilize urea as well. Some TDI applications already use urea (Passat, Touareg).

http://en.wikipedia.org/wiki/Diesel_exhaust_fluid
_________________________
'02 530i (Edge HM 10W-40)
'15 Q5 3.0T (Edge 5W-40)

Top
#3262925 - 01/28/14 05:47 PM Re: Urea injection for diesel [Re: wemay]
PandaBear Offline


Registered: 08/05/02
Posts: 13304
Loc: Silicon Valley
Originally Posted By: wemay
Why do some vehicles require this, i.e., Chevy Cruze Diesel and others do not, like the Jetta TDI? What is the main purpose?



The main purpose is to get rid of the high NOX emission on diesel. Some cars don't require it because they run rich once in a while to provide enough HC and CO to be burnt and neutralize with the NOX. With urea you do not have to do that (and in theory can run at higher efficiency overall).
_________________________
"You keep asking questions PandaBear and you'll end up a vegetarian like my wife" - Camu Mahubah

Top
#3262931 - 01/28/14 05:50 PM Re: Urea injection for diesel [Re: wemay]
wemay Offline


Registered: 04/04/12
Posts: 5965
Loc: South Florida
thanks guys
_________________________
16 Toyota Corolla LE 1.8 CVT
Toyota Genuine Motor Oil 0W20 | OEM | 10K

13 Hyundai Santa Fe Sport 2.0T
Valvoline 5W30 | VO106 | 3K

Top
#3262938 - 01/28/14 05:55 PM Re: Urea injection for diesel [Re: wemay]
JHZR2 Offline



Registered: 12/14/02
Posts: 38287
Loc: New Jersey
It is a reagent in the catalytic process to get rid of NOx. In the USA, we're held hostage by California's geography and thus we can call 8 MPG SUVs "partial zero" emissions vehicles, while diesels are "gross polluters" when they return 50 MPG - and are forced to have this claptrap.

Actually Id rather have urea than not, and go another route. I think the processes to prevent NOx in diesels are worse than the aftertreatment...

Top
#3262944 - 01/28/14 05:59 PM Re: Urea injection for diesel [Re: wemay]
wemay Offline


Registered: 04/04/12
Posts: 5965
Loc: South Florida
'claptrap' LOLOL...
_________________________
16 Toyota Corolla LE 1.8 CVT
Toyota Genuine Motor Oil 0W20 | OEM | 10K

13 Hyundai Santa Fe Sport 2.0T
Valvoline 5W30 | VO106 | 3K

Top
#3262970 - 01/28/14 06:18 PM Re: Urea injection for diesel [Re: wemay]
Eddie Offline


Registered: 12/07/03
Posts: 8193
Loc: Florida, Cape Coral
Like the PPM [censored] when comparing a 10 mpg vehicle to a 40 mpg vehicle. Thank you auto industry lobby.
_________________________
CX5 Touring 2.5L :-)

Top
#3262971 - 01/28/14 06:18 PM Re: Urea injection for diesel [Re: wemay]
AP9 Offline


Registered: 07/10/13
Posts: 256
Loc: Chicago suburbs
Standard three-way catalytic converter doesn't really work on diesels, since they are stratified-charge engines that run very lean and therefore have too much oxygen in the exhaust.
_________________________
2000 Ford Explorer XLT 4WD (4.0L OHV) - QSUD 5W-30/MC FL1A
1996 Chevrolet Impala SS - M1 0W-40/M1-201

Top
#3263117 - 01/28/14 08:13 PM Re: Urea injection for diesel [Re: wemay]
edwardh1 Offline


Registered: 01/17/03
Posts: 2257
Loc: Coastal South Carolina
what is the cost of the urea
_________________________
I know women who are always late, they do not allow travel time, they think like Star trek, you leave one place and materialize somewhere else.

Top
#3263123 - 01/28/14 08:17 PM Re: Urea injection for diesel [Re: edwardh1]
AP9 Offline


Registered: 07/10/13
Posts: 256
Loc: Chicago suburbs
DEF (urea in 32.5% solution with water) runs about $6/gallon in store, or under $3/gallon at truck stops with DEF pumps.
_________________________
2000 Ford Explorer XLT 4WD (4.0L OHV) - QSUD 5W-30/MC FL1A
1996 Chevrolet Impala SS - M1 0W-40/M1-201

Top
#3263300 - 01/28/14 11:17 PM Re: Urea injection for diesel [Re: wemay]
TiredTrucker Offline


Registered: 01/04/08
Posts: 2432
Loc: Central Iowa
I would have much rather the Urea/SCR thing would have been done first instead of the EGR [censored]. I don't care for any of this stuff, but having all emissions stuff handled outside the engine is a far better way to do it than making an engine eat it's own feces. As a side note, it has been shone that they can reduce EGR because of the SCR, and this in turn allows the engine to be more efficient and in turn the DPF doesn't have to do regens as frequently. Now, if they could just do away with the EGR, things might be more tolerable.
_________________________
In order to know what is bad, you have to know what is good. The question them becomes, what is the source of knowing what is good?

Top
#3263600 - 01/29/14 09:52 AM Re: Urea injection for diesel [Re: wemay]
Stephen M. Offline


Registered: 10/12/05
Posts: 19
Loc: Vincennes, IN.
The Chevy Cruze does in face have a Urea injection system. The storage tank is located in the trunk.

Top
#3263609 - 01/29/14 10:04 AM Re: Urea injection for diesel [Re: Stephen M.]
Quattro Pete Offline


Registered: 10/30/02
Posts: 31798
Loc: Great Lakes
Originally Posted By: Stephen M.
The Chevy Cruze does in face have a Urea injection system.

Yuck. smile
_________________________
'02 530i (Edge HM 10W-40)
'15 Q5 3.0T (Edge 5W-40)

Top
#3263616 - 01/29/14 10:20 AM Re: Urea injection for diesel [Re: wemay]
wemay Offline


Registered: 04/04/12
Posts: 5965
Loc: South Florida
Chevy advises to fill every 10k mi or so. Out of curiosity, what would happen if you failed to do so?
_________________________
16 Toyota Corolla LE 1.8 CVT
Toyota Genuine Motor Oil 0W20 | OEM | 10K

13 Hyundai Santa Fe Sport 2.0T
Valvoline 5W30 | VO106 | 3K

Top
#3263676 - 01/29/14 11:07 AM Re: Urea injection for diesel [Re: wemay]
A_Harman Offline


Registered: 10/01/10
Posts: 6035
Loc: Michigan
The vehicle would go into a limp home mode until you refilled the urea container. I think if you go past a given number of miles with the urea system empty, it will refuse to start.
_________________________
1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
1972 GMC 1500 shortbed project truck

Top
Page 1 of 4 1 2 3 4 >