engine MITSUBISHI LANCER EVOLUTION X 2008 Manual PDF

MIVEC (Mitsubishi Innovative Valve Timing Electronic Control System)
MULTIPORT FUEL SYSTEM (MFI)13A-42
The detected phase angle is calculated using the cam position sensor signal.
AK604129AB
Overlap: nothing
small Exhaust valveIntake valveExhaust valveIntake valve
(initial position)
Exhaust valve
(initial position: most advance)
Intake valve
(initial position: most retard)Exhaust valveIntake valve
Initial position
Overlap: large Initial position
Crank angle Crank angle
Crank angle Crank angle Valve lift amount Valve lift amountValve lift amount Valve lift amount
LoadHigh output High torque
Middle load range
Low load range at
low speedHigh load range at
low and middle speedsHigh load range at
high speed
Engine speed
Low-fuel consumptionLow-fuel consumption

MIVEC (Mitsubishi Innovative Valve Timing Electronic Control System)
MULTIPORT FUEL SYSTEM (MFI)13A-44
Within range of low
speed and high load
at accelerationAdvancing closing timing of
intake valve allows amount
of intake air flowing back
into intake port to be limited
as well as allows
volumetric efficiency to be
improved, resulting in low
and middle speed torques
improved.Low and middle speed
torques improved
Within range of
middle speed and
middle loadIncreasing overlap amount
allows pumping loss to be
decreased. Retarding
opening timing of exhaust
valve allows burned gas to
work sufficiently and allows
cycle efficiency to be
improved, resulting in
higher expansion ratio.Fuel economy
improved
Within range of high
speed and high loadRetarding closing timing of
intake valve in accordance
with engine speed allows
valve timing to be
controlled according to
inertia force of intake air
and allows volumetric
efficiency to be improved.Output improved
Operation condition Valve timing Operation Effectiveness
AK604131AB
TDC
BDC Exhaust valveIntake valve
Open
Close
AK604132AB
TDC
BDC Exhaust valve
Intake valve Overlap:
large
Open
AK604133
TDC
BDC
AB
Exhaust valveIntake valve
Close

FUEL PUMP RELAY CONTROL
MULTIPORT FUEL SYSTEM (MFI)13A-46
FUEL PUMP RELAY CONTROLM2132006500208
When current flows through the fuel pump relay, the
relay turns ON and the fuel pump is driven. The fuel
pump relay is built into the ETACS-ECU. When the
ignition switch-ST signal is input, ECM turns ON the
power transistor for control of the fuel pump relay. As a result, power is supplied to the fuel pump. Also, if
engine speed falls below a set value, the fuel pump
relay is turned OFF. Thus, it deals with sudden stop
-
pages such as engine stalling etc. by stopping the
pump.
AK604135
M
OFF
ON
OFF
ON
AB IG2 STLOCK
ACC
IG1
ETACS
-ECUMFI
relay
ECM Fuel pumpFuel pump
relay
Crankshaft position sensor Ignition switch
To ECM
Ignition switch-ST Battery
Fuel pump
relay control

STARTER RELAY CONTROL
MULTIPORT FUEL SYSTEM (MFI)13A-47
STARTER RELAY CONTROLM2132025500092
AK604136
M
AB OFF ON OFF
ON
Engine-ECU
Starter relay
controlClutch
interlock
switch
ETACS
-ECUIgnition switch-STBattery
Starter relay
Starter
OFFON

STARTER RELAY CONTROL
MULTIPORT FUEL SYSTEM (MFI)13A-48
When the ignition switch-ST signal is input, ECM
turns ON the power transistor for control of the
starter relay.
AK604137
M
AB P
DNR
OFF ON OFF
ON
Engine-ECU
Starter relay
controlTransmission
range switch Ignition switch-STBattery
Starter relay
Starter ETACS
-ECU

HEATED OXYGEN SENSOR HEATER CONTROL
MULTIPORT FUEL SYSTEM (MFI)13A-49
HEATED OXYGEN SENSOR HEATER CONTROLM2132007000206
When exhaust gas temperature is low, the heated
oxygen sensor response is dull. So, response is
improved by raising the sensor temperature by pass
-
ing current through the heater at a low exhaust gas
temperature, such as in the immediate aftermath of
the engine start, or during the warm up operation and in cutting the fuel during deceleration. Based on driv
-
ing conditions and the heated oxygen sensor activa-
tion state, ECM changes the amount of current (duty
ratio) to the heater to quicken the activation of the
heated oxygen sensor.
AK602241AD
Battery Heated oxygen sensor heater
Engine coolant
temperature sensor MFI relay
ECM

GENERATOR CONTROL
MULTIPORT FUEL SYSTEM (MFI)13A-51
GENERATOR CONTROLM2132025000172
During engine idle operation, ECM controls duty of
conduction between generator G terminal and
ground. (G terminal duty is controlled to be the same
as ON duty of the power transistor inside the voltage
regulator). If headlights etc. are turned on while
engine is idling, the consumed current increases
suddenly, but by gradually increasing the generator G terminal OFF duty, ECM restricts sudden increase
in generator's output current and output current is
increased only gradually. (Battery current is supplied
to the headlamp etc. till generator produces sufficient
current.) Thus, ECM prevents change in idle speed
due to sudden increase of engine load.
AK602242 AD
Engine coolant temperature sensor
Generator G terminal
Generator FR terminal
Generator Crankshaft position sensor
A/C switch (CAN)
Ignition switch-STECM

EVAPORATIVE EMISSION CONTROL SYSTEM INCORRECT PURGE FLOW MONITOR
MULTIPORT FUEL SYSTEM (MFI)13A-52
EVAPORATIVE EMISSION CONTROL SYSTEM INCORRECT
PURGE FLOW MONITOR
M2132027200019
The ECM detects whether the fuel vapor leakage
exists or not from the evaporative emission control
system. By the specified pattern within the certain
operation range, the ECM drives the evaporative
emission purge solenoid and the evaporative emis
-
sion ventilation solenoid. This allows slight vacuum
to be produced in the fuel tank.
The ECM measures the vacuum condition through
the fuel tank differential pressure sensor signal. By
comparing the normal (expected) value and the
actual value, the ECM detects whether the fuel vapor
leakage exists or not from the evaporative emission
control system.
AK604139
Evaporative emission
purge solenoid
Evaporative emission
ventilation solenoid
Fuel tank differential pressure sensor
Fuel tank temperature sensor
AB
BatteryMFI relay
ECM Mass airflow sensor
Barometric pressure sensor
Intake air temperature sensor
Engine coolant
temperature sensor
Fuel level sensor (CAN)Fuel
tank
Fuel level
sensor To injector

12-1
GROUP 12
ENGINE
LUBRICATION
CONTENTS
GENERAL DESCRIPTION. . . . . . . . .12-2
OIL PASSAGE . . . . . . . . . . . . . . . . . .12-2
OIL FILTER . . . . . . . . . . . . . . . . . . . .12-3
OIL PAN . . . . . . . . . . . . . . . . . . . . . . .12-3
OIL DIPSTICK, OIL FILLER CAP,
OIL DRAIN PLUG . . . . . . . . . . . . . . . .12-4
OIL PUMP . . . . . . . . . . . . . . . . . . . . . .12-4

GENERAL DESCRIPTION
ENGINE LUBRICATION12-2
GENERAL DESCRIPTIONM2120000100249
The lubrication system is a full-flow, filter pumping
system.
The engine oil that accumulates in the oil pan is
drawn and discharged by the oil pump. After its pres
-
sure is regulated by the relief valve, the oil passes
through the oil filter. Then, it flows from the oil pas
-
sage in the cylinder block to the individual crankshaft
journals and the cylinder head.
After the oil is pumped to the individual crankshaft
journals, it passes through a passage in the crank
-
shaft and is fed to the pins. After the oil is pumped to
the cylinder head, it flows to the camshaft journals
and the engine oil control valves.
OIL PASSAGEM2120000200194
AK603615
Oil screen
Oil pan Relief valve
V.V.T. sprocket Engine oil control valveOil pump
Oil filter
Engine oil pressure swichOil filter bracket Cylinder block oil passage
Crankshaft journal
Camshaft journal
Crankshaft pin Cylinder block oil passage
(main gallery)
Cylinder head oil passage
AB