Mitsubishi Lancer Evolution 7. Manual — part 7
ENGINE -
Intake and Exhaust
1-7
INTER COOLER WATER SPRAY
To complement the intercooler efficiency in ranges where the cooling efficiency of the air cooled intercooler
is insufficient, and attain high performance in various operating environments, a system which cools by
spraying water from a special washer tank for the intercooler to the front of the intercooler has been
adopted.
The features of the intercooler water spray system is as follows.
D
Sprays water when the water spray switch on the floor console is operated.
D
Adopts a system which enables switching between the auto mode which automatically sprays water
at the optimum operating conditions by signals from the ECU according to the engine state, and
the manual mode which is operated by the driver.
D
Three water spray nozzles are located at optimum positions to enhance the intercooler efficiency.
CONSTRUCTION DIAGRAM
<Water Spray Nozzle/Water Spray Hose/Washer Tank>
Inter cooler
Water spray hose
Water spray nozzle
Water spray nozzle
Washer tank
<Water Spray Switch>
Water spray switch
ENGINE -
Intake and Exhaust
1-8
SYSTEM DIAGRAM
M
Ignition switch (IG2)
Ignition switch (IG1)
J/B
OFF
ON
Water spray relay
Water spray
motor
Engine-ECU
J/B
7.5A
7.5A
MANUAL
AUTO
Water spray switch
J/C
J/C
Combination
meter
Fuse
20A
Fuse
7.5A
Front-ECU
(Tail lamp relay)
ENGINE -
Exhaust System
1-9
EXHAUST SYSTEM
EXHAUST FITTING BRACKET
An exhaust fitting bracket has been added in order to provide
greater rigidity.
TURBOCHARGER
The turbocharger type TD05HR-16G6-9.8T and TD05HRA-16G6-9.8T have been adopted.
Compared to previous types of turbocharger, these new types have a smaller turbine housing nozzle
area which improves response at medium to low speeds.
Section A - A
Nozzle area
A
A
Exhaust fitting
Exhaust fitting bracket
Exhaust manifold
heat protector
ENGINE -
Intake and Exhaust
1-10
EXHAUST PIPE AND MUFFLER
Exhaust pipe consisting of 3 separation system: front exhaust pipe, center exhaust pipe, and exhaust
main muffler, has the following features:
D
The adoption of a seal ring has reduced vibrations during idling and driving noise.
D
A main muffler incorporating a back pressure variable valve is adopted.
D
Straight layout of exhaust piping has reduced vibration and exhaust pressure in exhaust system.
D
The adoption of hanger rubber with lower spring constant and the decreased number of hangers
have reduced vibration in exhaust piping.
D
The adoption of all stainless exhaust piping has enhanced resistance to corrosion and heat.
D
Installation of thermal insulating cover and materials on front pipe has improved emission control
performance.
CONSTRUCTION DIAGRAM
Center exhaust pipe
Main muffler
Pre-muffler
Catalytic converter
Front exhaust pipe
Seal ring
Pre-muffler (sub)
Oxygen sensor
When valve
is open
Back
pressure
variable
valve
Flow of exhaust gas
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