2008 MITSUBISHI LANCER EVOLUTION X fuel pressure

GENERAL DESCRIPTION
HEATER, AIR CONDITIONING AND VENTILATION55-2
GENERAL DESCRIPTIONM2551001500040
The blower, heater, and evaporator have been inte-
grated with the heater and A/C system to achieve a
greater fan power and noise reduction.
FEATURES
.
ENHANCEMENTS IN COMFORT
•With the adoption of fully-automatic A/C, the out-
side/inside air circulation switching, air outlet, and
outlet air temperature are automatically con
-
trolled according to the ambient temperature,
solar radiation, and passenger compartment tem
-
perature so that the optimum air conditioner is
achieved.
•By the adoption of clean air filter, the air quality
inside the passenger compartment has been
enhanced.
.
ENHANCEMENTS IN OPERATION
PERFORMANCE
•Operability has been enhanced by the adoption
of large triple dial.
•Customise function has been added for the
enhanced convenience.
.
ENHANCEMENTS IN FUEL ECONOMY
•The high efficiency compressor with a 2-step pro-
file oil separator has been installed, thus enhanc-
ing the fuel economy.
•The idle-up speed is controlled in two steps to
secure the air cooling performance during sum
-
mer and to enhance the fuel economy in the sea-
sons with moderate temperature.
•Enhancement of fuel economy by the cooling fan
control depending on the refrigerant pressure and
vehicle speed.
.
ENHANCEMENT IN SAFETY
•A/C system is stopped when the air bags are
deployed.
•Crushable space has been adopted to heater unit
to reduce the risk of passenger injuries in case of
a collision.
.
GLOBAL ENVIRONMENT PROTECTION
•New refrigerant system (HFC134a) has been
adopted.
•By the optimisation of A/C system, the refrigerant
charging amount has been reduced.
•Clean air filter media and its cover are separated
to reduce waste materials.
.
ENHANCEMENTS IN SERVICE QUALITY
•Reduction of refrigerant gas leakage and
enhancement in serviceability by incorporating
condenser and receiver
•Clean air filter is installed to the backside of glove
box to facilitate the filter replacement.
.
ENHANCEMENTS IN RESPONSIBILITY
Reliable information transmission is achieved by
connecting A/C-ECU and each ECU via CAN com
-
munication.
SPECIFICATIONS
ITEMSPECIFICATION
Air conditioning switch typeRotary type
Compressor typeMSC90CAS
Cooling output5.5 kw
Heating output5.7 kw
RefrigerantTy p eR134a (HFC-134a)
Charge quantity g (oz.)480 - 520 (16.9 - 18.3)

A/C-ECU
HEATER, AIR CONDITIONING AND VENTILATION55-7
A/C-ECUM2551001200265
CONTROL
.
FORCED DEF CONTROL
When air outlet position is switched to DEF, A/C is
automatically turned ON, and outside/inside air
selection damper is set to the fresh air position to
quickly defrost the windshield screen.
.
MAX A/C CONTROL
When the temperature adjustment knob is turned to
the maximum A/C position with the blower knob at
position other than OFF, the following controls are
made by the A/C-ECU.
NOTE: "*" Manual operation is disabled during max
A/C control.
.
MAX COOL, MAX HOT CONTROL

When the set temperature is at 18.0 °C <61°F>
(MAX COOL) or at 32.0
°C <89°F> (MAX HOT) with
the air outlet and air volume at the AUTO positions,
the following controls are made automatically by the
A/C-ECU.
NOTE: "*" indicates that when the automatic control
is not cancelled using the customise function, the
manual operation is disabled.
.
REAR WINDOW DEFOGGER TIMER
CONTROL
In order to prevent battery consumption, the defog-
ger is automatically turned OFF, 20 minutes after it is
turned ON.
.
IDLE-UP CONTROL
A/C-ECU and the engine ECU communicate with
each other through the CAN communication. The
idle-up speed of the engine is controlled in two steps
depending on the A/C load to secure the air cooling
performance during summer and to enhance fuel
economy in seasons with moderate temperature.
.
DETECTION CONTROL FOR
REFRIGERANT LEAKS
A/C-ECU determines if the refrigerant amount is less
than specified or refrigerant pressure is abnormal by
using the ambient temperature (ambient temperature
sensor to measure refrigerant inflation rate) and
refrigerant pressure (measured by the A/C pressure
sensor). When refrigerant amount or refrigerant pres
-
sure is judged abnormal, the compressor is cut-off to
protect the A/C system.
NOTE: When abnormality occurs, the A/C indicator
flashes.
.
PROTECTION CONTROL AT AIR BAG
DEPLOYMENT (DURING COLLISION)
When the air bag deployment is detected, the A/C
system is stopped.
.
CUSTOMISE FUNCTION
Depending on the user's preference, the following
functions can be selected. The programmed informa
-
tion is held even when the battery is disconnected.
•Automatic control for inside/outside air selection
Press and hold (approximately for 10 seconds)
the inside/outside air selection switch to cancel
the automatic control for inside/outside air selec
-
tion.
•A/C automatic control
Press and hold (approximately for 10 seconds)
the A/C switch to cancel the A/C automatic con
-
trol.
Subject to controlMAX COOL
Air mix damperMAX COOL position
Air outlet modeSelected position
Air volumeSelected position
Outside/inside air
selection damperAir recirculation position*
Air conditioner switchON*
Subject to
controlMAX COOLMAX HOT
Air mix
damperMAX COOL
positionMAX HOT
position
Air outlet
modeFACE positionFOOT position
Air volumeMaximumMaximum
Outside/insid
e air
selection
damperAir recirculation
position*Fresh air
position*
Air
conditioner
switchON*OFF*

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-8
EMISSION CONTROL
GENERAL DESCRIPTIONM2171000101024
The following changes have been made to the con-
trols of the 2.4L engine provided on the GALANT.
SYSTEM CONFIGURATION DIAGRAM

Improvement / AdditionsRemark
Addition of HC trap catalytic converter HC decrease
AK604140
Positive crankcase
ventilation valve
Fuel pressure
regulator Evaporative emission
purge solenoid
Evaporative
emission
canisterEvaporative emission
ventilation valve
Fuel level
sensor
Fuel tank differential
pressure sensor
Fuel tank
temperature
sensor Fuel pump
Three-way catalytic converter Heated oxygen
sensor (front)
Heated oxygen
sensor (rear)Fuel tank
AB

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-9

Exhaust gas cleaning devices list
AK604141
Three-way catalytic converter Heated
oxygen
sensor
(front)
Heated
oxygen
sensor
(rear)
HC trap
catalytic
converterHeated oxygen sensor (3rd)Positive crankcase
ventilation valve
EGR valve
(stepper motor)
AB
Fuel level
sensorFuel
tank
Fuel tank differential
pressure sensor
Fuel tank
temperature
sensor Fuel pump Fuel pressure
regulator Evaporative emission
purge solenoid
Evaporative
emission
canisterEvaporative emission
ventilation valve
SystemObjective / FunctionComposition parts
Crankcase ventilation
systemHC decrease
Re-combustion of blow-by gas.
Positive crankcase ventilation
(PCV) valve
Evaporative emission
control systemHC decrease
Re-combustion of fuel vapor gas.
•Canister
•Evaporative emission purge
solenoid
Exhaust gas recirculation
(EGR) system
NOx decrease
Reduce NOx generation by controlling EGR
volume according to engine warm-up condition
and driving conditions.
EGR valve

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-10
CRANKCASE VENTILATION SYSTEMM2171000400129
A blow-by gas reduction device prevents blow-by
gas from being expelled into the atmosphere and is
of closed type. A positive crankcase ventilation
(PCV) valve is provided in the ventilation hose from
the rocker cover to the intake manifold. During low
load driving, clean air is supplied to the crankcase by
the air intake hose via the breather hose and rocker
cover, and it mixes with the blow-by gas in the crank
-
case. The blow-by gas in the crankcase is induced to
the intake manifold through the rocker cover and
PCV valve. During high load driving, blow-by gas in
the crankcase is induced to the intake manifold
through the rocker cover and PCV valve and at the
same time also via the air intake hose and throttle
body due to negative pressure in the air cleaner.
Emission
reduction
systemsAir-fuel ratio
feedback
controlDecrease of CO, HC and NOx
Controls air-fuel ratio of air-fuel mixture to
become theoretical air-fuel ratio (about 14.7),
which is when the 3-way catalytic converter's
cleaning performance is best. It also controls
optimum fuel supply based on coolant
temperature, driving conditions etc.
•ECM
•Mass airflow sensor
•Injectors
•Heated oxygen sensor
•Crankshaft position sensor
etc.
Catalytic
converterDecrease of CO, HC and NOx
It facilitates oxidation of CO and HC and
reduction of NOx so that all 3 component gases
are cleaned simultaneously.
Monolith catalyst
HC trap
catalytic
converter
HC decrease
During cold operation of engine, exhaust HC is
temporarily absorbed. And then Exhaust HC is
released when temperature reaches to level at
which catalyst is activated. This allows HC to be
reduced.
Monolith catalyst
System Objective / Function Composition parts
AK604142
Air cleaner
PCV valve
AB
Ventilation hose
Breather hose
Flow of blow-by gas and clean air (low load area)
Flow of blow-by gas (high load area)

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-11
POSITIVE CRANKCASE VENTILATION (PCV)
VA LV E
PCV valve lifts the plunger according to negative pressure in
the intake manifold to create appropriate ventilation for the
crankcase.
EVAPORATIVE EMISSION CONTROL SYSTEMM2171000200147
HC (hydrocarbon) generated in the fuel tank are
adsorbed by the active carbon in the canister and
stored. HC stored in the canister is introduced to the
intake manifold when engine is in operation where it
is mixed with intake air and combusted. ECM intro
-
duces optimum HC amount according to driving con-
ditions and so performs duty control on the
evaporative emission purge solenoid. Also, the evap
-
orative emission purge solenoid is closed during
deceleration or immediately after engine start to
restrict change in air-fuel ratio and prevent engine
from stalling.
AK602324AC
Plunger
From
rocker
coverTo intake
manifold
Spring
AK604143
Evaporative emission
purge solenoid
Mass airflow sensor
ECM Intake air temperature sensor
Manifold absolute pressure
sensor
Engine coolant temperature
sensor
Throttle position sensor
Crankshaft position sensorEvaporative emission
canister
AB
MFI relay
Battery

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-12
EVAPORATIVE EMISSION PURGE SOLENOID
An evaporative emission purge solenoid is installed in the
intake manifold.The evaporative emission purge solenoid con
-
trols the intake volume of fuel vapor gas from the canister. The
evaporative emission purge solenoid is a duty control type
solenoid valve. When current is not passing through the coil,
nipple A is kept airtight and fuel vapor gas cannot be sucked in.
When current passes through the coil, air can pass between
nipple A and B and fuel vapor gas is sucked in. ECM changes
the ON duty ratio according to engine's operating condition to
control the intake volume of fuel vapor gas.
EXHAUST GAS RECIRCULATION (EGR) SYSTEM M2171000300122
When the combustion gas temperature becomes
high, generation of the environment polluting NOx
(nitrogen oxides) increases rapidly. EGR system is
used to decrease the volume of NOx generated.
EGR system re-circulates exhaust gas inside the
intake manifold. It increases specific heat of the com
-
bustion gases and reduces combustion speed to lower the combustion temperature and reduce the
volume of NOx generated. ECM calculates the EGR
introduction volume according to engine operating
conditions and controls the EGR valve opening angle
at optimum. Also, immediately after the ignition
switch ON signal is input, it drives fully closed step
-
per motor and performs initialization.
AK604745AC
B To canister
To intake manifoldA
AK602245AD
12V
ONOFF
0V100 ms
Evaporative
emission
purge solenoidFrom MFI relay
ECM
AK502987AE
ECMMass airflow sensor
Intake air temperature sensor
Manifold absolute
pressure sensor
Engine coolant
temperature sensor
Throttle position sensor
Crankshaft position sensor BatteryEGR valve
(stepper motor)

GENERAL INFORMATION
FUEL SUPPLY13B-2
GENERAL INFORMATIONM2134000100833.The fuel system consists of the following compo-
nents:
•Fuel injector
•Fuel rail
•Fuel pipe
•Fuel tank
•Fuel pump module
•Evaporative emission canister
SPECIFICATIONS
CONSTRUCTION DIAGRAM
This fuel system is designed with consideration for
global environment protection to ensure safety at a
collision, reduce weight, and improve reliability and
quality. This system has the following features:
•A quick-joint connector of a plastic tube is used
for the fuel high-pressure hoses in the engine
compartment to reduce the permeation of fuel
evaporative emission.
•The surface of underfloor fuel pipes is coated
with 1-mm thickness of plastic to improve resis
-
tance to corrosion and chipping.
•A returnless fuel system eliminates returned fuel
from the engine. The heat that fuel receives from
the engine is reduced, minimizing fuel tempera
-
ture in the fuel tank and controlling the amount of
evaporated gas.
ItemSpecification
Fuel tank capacity dm3 (gal)59 (15.5)
Fuel pump typeElectric
Fuel filter typeCartridge (incorporates fuel pump module)
Fuel return systemReturnless
Fuel pump pressure regulator pressure kPa (psi)324 (46)
Fuel injectorTy p eElector-magnetic
Quantity4
Evaporative emission control systemCanister
AC610224
Fuel rail
Fuel injector
Fuel pipeFuel pump moduleEvaporative
emission
canister Fuel tank
AB