MITSUBISHI MONTERO 2000 Service Repair Manual

E
G R so le n oid valv e No.2 1
7-3 E
XH AUST GAS REC IR CULA TIO N (E G R) SYSTE M
G EN ER AL IN FO RM ATIO N
T he ele ctr o nic a lly -c o ntr o lle d EG R syste m co nsis ts
o f an EG R va lv e , a va cu um pum p, EG R so le noid
v a lv e s Nos.1 and 2, EG R va lv e posit io n se nso r
a nd engin e-E C U.
T he EG R va lv e is co ntr o lle d by th e negativ e
p re ssu re in sid e th e va lv e , whic h is co ntr o lle d by
E G R so le noid va lv e s Nos.1 and 2.
I n ord er to obta in EG R am ount co rre sp ondin g to
e ach opera tin g co ndit io n, th e appro pria te openin g
o f th e EG R va lv e is ca lc u la te d base d on th e in put
s ig nalfr o m each se nso r. F
eedback co ntr o l of th e EG R so le noid va lv e s No.
1 and No. 2 opera tio n is ca rrie d out base d on th e
s ig nal fr o m EG R va lv e posit io n se nso r so th at th e
o penin g of th e EG R va lv e ca n be quic kly adju ste d
t o th e ta rg et angle .
I n th is way, th e EG R is co ntr o lle d to re duce NO x
e m is sio ns while main ta in in g good engin e
p erfo rm ance .
S YSTE M DIA G RAM

N
orm alc o ndit io n W
hen cu rre nt is
f lo w in g V
acu um le aks (V acu um is m ain ta in ed when
n ip ple A is plu gged) W
hen cu rre ntis not
f lo w in g V
acu um is m ain ta in ed

N
orm alc o ndit io n W
hen cu rre nt is
f lo w in g V
acu um is m ain ta in ed W
hen cu rre ntis not
f lo w in g V
acu um le aks C

E
G R VA LV E AND EG R CO OLE R
R EM OVA L AND IN STA LLA TIO N 1
2 7 45
1
1
2
2 ±4 N·m
2 2 ±4 N·m
13 1
4
1 7 ±2 N·m
1
5
R em oval ste p s
1 . E G R va lv e co nnecto r
2 . Vacu um hose co nnectio n
3 . E G R va lv e
4 . E G R gaske t
5 . E G R pip e gaske t
6 . E G R upper pip e
" AA 7. E G R pip e gaske t
" CA 8. W ate r pip e and hose asse m bly "
BA 9. O -rin g
1 0. W ate r hose co nnectio n
1 1 . E G R co ole r and EG R lo w er pip e
a sse m bly
" AA 12. E G R pip e gaske t
1 3. E G R lo w er pip e
" AA 14. E G R pip e gaske t
1 5. E G R co ole r
w
ww.W ork sh opM an uals .c o .u k
P urc h ased f r o m w ww.W ork sh opM an uals .c o .u k

E
G R co ole r or
c ylin der blo ck T
a b on EG R pip e
g aske t T
herm osta t housin g W
ate r pip e O
-rin g W
ate r hose E
G R co ole r sid e

C
ATA LY TIC CO NVER TE R
G EN ER AL IN FO RM ATIO N
T he th re e-w ay ca ta ly tic co nve rte r, to geth er wit h
t h e clo se d lo op air -fu el ra tio co ntr o l base d on th e
o xyg en se nso r sig nal, oxid iz e s ca rb on monoxid es
( C O )and hyd ro ca rb ons (H C)and re duce s nit r o gen
o xid es (N O x). W
hen th e mix tu re is co ntr o lle d at sto ic h io m etr ic
a ir -fu el ra tio , th e th re e-w ay ca ta ly tic co nve rte r
p ro vid es th e hig hest purif ic a tio n again st th e th re e
c o nstit u ents , nam ely , CO ,HC and NO x.
R EM OVA L AND IN STA LLA TIO N 4
9 ±10 N·m
3
R em oval ste p s
1 . C ata ly tic co nve rte r
2 . S eal rin g
3 . G aske t
w
ww.W ork sh opM an uals .c o .u k
P urc h ased f r o m w ww.W ork sh opM an uals .c o .u k

S
ta ndard va lu e E
G R va lv e asse m bly outp utvo lt a ge V 0
.5 -4.5

E
G R va lv e asse m bly
E
N G IN E AND EM IS SIO N CO NTR O L - E
m is sio n Contr o l Syste m
< 4M 4>
1
7-1 0

E
G R VA LV E AND EG R CO OLE R <4M 4>
R EM OVA L AND IN STA LLA TIO N 4 51
0
1 2
9 1
0 2

NOTES


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