7/30/2019 SD Diesel Aftertreatment

1/19/2009 for more information, go to WWW.media.ford.c

fs w 6.7-l Pw Sk V-8 ubh sl plys ul pss

2010 l sss ss h ll u x (nox) lvls by h 80 p p

wh pvus uls. fs slu ps usy-pv hly, wl-lss supply ps

and Ford-developed strategies to create an efcient, seamless system.

Diesel Engine Aftertreatment: How Ford Knocks Out the NO

The rst step in cleaning the diesel

xhus us wh h xhus

s s h dsl ox

clys (doc). th l h

doc s wl. fs, vs xzs hybs

bu 250 s clsus

w b x.

S, h doc s us pv

and promote heat, using specic

ss,

h xhus sys. thuh

ppp hl ,

hs h ss h vs

efciency of the downstream

subsys(s) u sss.

Step One:Cleaning and Heating

th s sp h pss s kw s Slv

cly ru (Scr). i hs pss, h nox

h xhus s s v w

, whh s ps h sph

hlss. B h xhus s s h

Scr hb, s s wh dsl exhus flu

(def), ls kw s u, quus slu h s

ppxly 67.5 p w 32.5 p pu

u.

Wh ha, h def splis i ammia a arb

ixi. ths mluls ar amiz, brk up a

vapriz, h r a mixr ha rsmbls a rksrw.

this wis mixr vly isribus h ammia wihi h

exhaust fow. The ammonia enters the SCR module, which

ais a aalyz subsra, a hrugh hmial

rais mbis a vrs h nox a ammia

i h harmlss ir irg a war. dsig ypially

urs bw 200 a 500 grs clsius.

Step Two: Knocking Out the NOx

The nal step of the

ls sys h

sl xhus s vlvs

h dsl Pulfl (dPf). th dPf

ps y s,

whh s h plly

bu wy, kw s

, wh sss

h p s ull. th

pss ss

pus xss

600 s clsus bu

wy s.

Step Three:Scrubbing Awaythe Soot

th fr sysm is sig s ha def is

rplish apprximaly vry 7,500 mils,

pig usmr us. th mssag r will

alr h usmr i h def s b rplish.

The rst message comes when the customer has

bu 800 ls wh def .

The ll nozzle for the DEF is located next to the

ul p. i hs blu p. f-ppv def

wll b vlbl 1- 2-1/2-ll bls wh

zzls b puhs f ls h ls.

DEF Replenishment FactsCleaner In MeansCleaner Out

Pressure and

Temperature Sensors

Line Heater Diesel

Exhaust Fluid

Tank Unit

Diesel Oxidation Catalyst Selective Catalytic Reduction Catalyst Diesel Particulate Filter

Exhaust Gas Temperature Sensor

ij def u nox s pv

hly hs b us huhu h

u usy. Ulk h slus us

l nox, h def sys llws h sl

u s pu s

ul xu s syss qu h

u h, whh b hul sl

s, l h nox.

Why Ford Uses the DieselExhaust Fluid (DEF) Method

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bs by pz

h w 6.7-l Pw

Sk ubh

diesel engine for efcient

bus, whh hlps

u hul sss

h s. cuss

benet from a moreefcient system, which

uss lss ul, u

the efciency leads to

xhus s h

s vly bu

h sys.

th sys s h-

sp pss wh h

subsys ully

s ps s

u.DEF Injector

Nox/Temperature

Sensor