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Unformatted text preview: Low to medium
‘speed stage High speed stage Fig. 24.2 Front View of dual-stage induction manifold sy Intake Air cleaner '
throttle
valve Power—valve
Valve 0 enin osition sensor
Plenum p g p
chamber Electronic motor servo I
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N M Short secondary tract Long primary tract Long tract only open - Both tracts open i Engine torque (N m) .L __J__ L__
1000 2000 3000 4000 5000 Engine speed (rev/min) Fig. 24.3 Torque-speedcharacteristics for dual-stage
induction manifold system ' stem with merging primary and secondary tracts Ceramic E
honeycomb CO l
r — l
HC {/””//A\\\\\\\\\\\\\\V Stainless steel casin ‘
I 9 l
. NOX é} 4‘ V C02 . i
Alumina ¥ 64 H20 Wire mesh support ‘
washcoat ’74)); ( N2
Platinum and ‘@/%W Ceramic honeycomb Three—pass absorbent
rhodium ‘ matrix chamber
C O a t ‘ n g “— "CEQEQI‘IJAIL'. Exhaust
manifold JVIKWA'UJJEJW‘ Flange
Joint l
Exhaust 1/
;. Intermediate silencer i]
Twin forked ’ ' ‘ ‘ . exhaust pipe :
down—pipe pipe Exhautst pipe l
-Lambda . Shield Catalytic moun mg l
sensor . converter l
l
l Fig. 24.13 Exhaust system with catalytic converter 626 3 2 . 1 03$ oEoEoEoEHw 16 4
1| 12 O 8 6 4 2
41 EEEO> >8 momma mExocoE :onomo Ucm mEXEU 5088 .com>xo woommucwome 10 12 14 Air/fuel ratio by mass Fig; 24.12 Exhaust gas composition for a typical petrol engine NO, CO, and HC concentrations (not to scale) 1.1 1.2 ...
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- Fall '11
- Morehouse
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