1997 MITSUBISHI TRITON Workshop Manual

E
ngin e c o ndit io n N
orm al c o ndit io n 5
3 k P a 3
,0 00 r /m in V
acu um is
m ain ta in ed E
ngin e c o ndit io n N
orm al c o ndit io n 5
3 k P a A
t id le V
acu um is
m ain ta in ed 3
,0 00 r /m in V
acu um w ill le ak
f o r a ppro xim ate ly
3 m in ute s a fte r
t h e e ngin e is
s ta rte d. A fte r 3
m in ute s h ave
p asse d, th e
v a cu um w ill b e
m ain ta in ed
m om enta rily , a fte r
w hic h it w ill a gain
l e ak.* N
O TE
* : The v a cu um w ill le ak c o ntin uously if th e a tm osp heric
p re ssu re is a ppro xim ate ly 7 7 k P a o r le ss, o r th e te m pera tu re
o f th e in ta ke a ir is a ppro xim ate ly 5 0
C o r h ig her.
P U RG E P O RT V A CUUM C HEC K 17300150183
1 . Dis co nnect th e v a cu um h ose ( re d s tr ip e) fr o m th e th ro ttle
b ody p urg e v a cu um n ip ple a nd c o nnect a h and v a cu um
p um p to th e n ip ple . P
lu g P
urg e p ort v a cu um n ip ple

N
orm al c o ndit io n A
pplie d V
acu um le aks N
ot a pplie d V
acu um m ain ta in ed B
atte ry
B
A

E
G R c o ntr o l s o le n oid v alv e E
G R v alv e
1
7-1 4 E
XH AUST G AS R EC IR CULA TIO N ( E G R) S YSTE M 17300520182
G EN ER AL IN FO RM ATIO N
T he e xh aust g as r e cir c u la tio n ( E G R) s yste m lo w ers
t h e n it r o gen o xid e ( N O x) e m is sio n le ve l. W hen t h e
a ir /fu el m ix tu re c o m bustio n te m pera tu re is h ig h,
a la rg e q uantit y o f n it r o gen o xid es ( N O x) is
g enera te d in th e c o m bustio n c h am ber. T here fo re ,
t h is s yste m r e cir c u la te s p art o f e m is sio n g as fr o m t
h e e xh aust p ort o f th e c ylin der h ead to th e
c o m bustio n c h am ber th ro ugh th e in ta ke m anif o ld
t o d ecre ase th e a ir /fu el m ix tu re c o m bustio n
t e m pera tu re , r e su lt in g in r e ductio n o f N O x.
T he E G R flo w r a te is c o ntr o lle d b y th e E G R v a lv e
s o a s n ot to d ecre ase th e d riv e abilit y .
O PER ATIO N
T he E G R v a lv e is b ein g c lo se d a nd d oes n ot
r e cir c u la te e xh aust g ase s u nder o ne o f th e fo llo w in g
c o ndit io ns. O th erw is e , th e E G R v a lv e is o pened
a nd r e cir c u la te s e xh aust g ase s.

The e ngin e c o ola nt te m pera tu re is lo w .

The e ngin e is a t id le .

The th ro ttle v a lv e is w id ely o pened.
S YSTE M D IA G RAM
Engin e c o ola nt
t e m pera tu re s e nso r
O
N
O FF E
G R
c o ntr o l
s o le noid
v a lv e
Air flo w s e nso r
C ra nk a ngle s e nso r
C
ontr o l
r e la y
Engin e-E C U
B
atte ry
E
G R v a lv e
E
A
C O M PO NEN T L O CATIO N

N
orm al v a cu um c o ndit io n O
pen q uic kly N
o v a cu um w ill g enera te
( th e s a m e a s b aro m etr ic
p re ssu re .) N
orm al v a cu um c o ndit io n O
pen q uic kly I
t w ill m om enta rily r is e o ve r
1 3 k P a P
assa ge o f a ir 5
.3 k P a o r le ss A
ir is n ot b lo w n o ut 2
6 k P a o r m ore A
ir is b lo w n o ut E
G R
v a lv e G
re en
s tr ip e G
re en s tr ip e P
lu g E
G R
v a lv e

B
n ip ple c o ndit io n N
orm al c o ndit io n N
ot a pplie d O
pen V
acu um m ain ta in ed A
pplie d O
pen V
acu um le aks C
lo se d V
acu um m ain ta in ed V
acu um
Engin e s p eed ( r/m in ) B
atte ry B
C

C
ATA LY TIC C O NVER TE R 17300530123
G EN ER AL IN FO RM ATIO N
T he th re e-w ay c a ta ly tic c o nve rte r, to geth er w it h
t h e c lo se d lo op a ir -fu el r a tio n c o ntr o l b ase d o n
t h e o xyg en s e nso r s ig nal, o xid iz e s c a rb on
m onoxid es ( C O ) a nd h yd ro ca rb ons ( H C) a nd
r e duce s n it r o gen o xid es ( N O x). W
hen th e m ix tu re is c o ntr o lle d a t s to ic h io m etr ic
a ir -fu el r a tio , th e th re e-w ay c a ta ly tic c o nve rte r
p ro vid es th e h ig hest p urif ic a tio n a gain st th e th re e
c o nstit u ents , n am ely , C O , H C a nd N ox.
R EM OVA L A ND IN STA LLA TIO N 17300390141 2
5 N m 1
3 N m 4
5 N m 3
5 N m 5
0 N m
8

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P etr o l- p ow ere d v eh ic le s>
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2 23
4
1
3
4
Can is te r r e m oval s te p s
1 . B re ath er h ose c o nnectio n
2 . Vapour h ose c o nnectio n
3 . C anis te r
4 . C anis te r h old er T
w o-w ay v alv e r e m oval s te p s
 Rear b ody s id e g ate s ta y ( L .H .)
1 . B re ath er c a se
2 . Vapour h ose c o nnectio n

A 3. Tw o-w ay v a lv e
4 . Vapour h ose

A
ir p asse s th ro ugh w it h a s lig ht
f e elin g o f r e sis ta nce . L
ig htly b lo w fr o m o utle t s id e. A
ir p asse s th ro ugh. T
a nk s id e T
w o-w ay v a lv e I
n le t s id e O
utle t s id e R
ubber s id e