Mitsubishi Lancer Evolution 7. Manual — part 8
ENGINE -
Fuel System
1-11
FUEL SYSTEM
The fuel system consists of parts such as electromagnetic-type fuel injectors, a delivery pipe and a fuel
pressure regulator. In addition, a fuel pressure control solenoid valve has been provided in order to maintain
idling stability after the engine is re-started when it is hot. This system is basically the same as the
previous system used in the 4G63-DOHC-Turbocharger engine for the EVOLUTION-VI.
SPECIFICATIONS
Items
Specification
Fuel tank capacity L
48
Fuel tank capacity L
48
Fuel pump type
Electric
Fuel pump type
Electric
Fuel filter type
Cartridge (filter-paper type)
Fuel return system
Fuel pressure regulator return
Fuel pressure regulator control pressure kPa
294
Fuel pressure regulator control pressure kPa
294
Injectors
Type
Electromagnetic
j
Quantity
4
Evaporative emission control system
Canister type
CONSTRUCTION DIAGRAM
Injector
Fuel pressure regulator
Delivery pipe
Fuel cut-off valve assembly
Pipe and gauge assembly
Fuel pump and gauge assembly
Fuel tank
Evaporative canister
Fuel pump relay
Injector resistor
Fuel pump resistor
ENGINE -
Fuel System
1-12
FUEL TANK
A steel fuel tank is located under the floor of the
rear seats to provide increased safety and increase
the amount of luggage compartment space.
D
The fuel tank has been equipped with a valve
assembly which incorporates a fuel cut-off valve
to prevent fuel from leaking out in the event
of a collision for adjusting the pressure inside
the fuel tank.
D
For better serviceability, the fuel tank has been
coupled with the main line by a one-touch joint
method, not the conventional double flare nut
method.
CONSTRUCTION DIAGRAM
Fuel cut-off valve assembly
Pipe and gauge assembly
Fuel pump and gauge assembly
Fuel high-pressure hose
Suction hose
Fuel high-pressure hose
Fuel tank
ENGINE -
Control System
1-13
CONTROL SYSTEM
The control system is based on the system for 4G63-DOHC-Tubocharger which has been installed in
the EVOLUTION-VI, with the following improvements added.
Improvements/Additions
Remarks
Adoption of compact throttle position sensor
D
Smaller size and light weight
D
Higher resistance to vibration
D
Idle position switch disused
D
Basically the same as that used in the SPACE
WAGON
Adoption of compact stepper motor for idle speed control
servo
D
Improved ignition performance
D
Basically the same as that used in the LANCER
Adoption of PWM (pulse width modulation) method of
radiator fan motor control
D
Reduced fuel consumption
D
Reduced fan noise
D
Basically the same as that used in the LANCER
Adoption of dual oxygen sensor
D
Higher reliability of air fuel ratio control
D
Basically the same as that used in the GALANT
Adoption of intercooler water spray control
D
Improved intercooler cooling efficiency
ENGINE -
Control System
1-14
SYSTEM BLOCK DIAGRAM
Oxygen sensor heater (rear)
Intercooler water spray lamp
Intercooler water spray relay
Waste gate solenoid valve
Fuel pressure control solenoid valve
Air flow sensor
Fan motor relay (HI, LOW)
(A/C condenser)
Fuel pump relay 3
No.4 injector
No.3 injector
No.1 injector
No.2 injector
Fuel injection control
Engine-ECU
Intake air temperature sensor
Engine coolant temperature sensor
Air flow sensor
Throttle position sensor
A/C switch
Power steering fluid pressure switch
Ignition switch-IG
Ignition switch-ST
Alternator FR terminal
Power supply
Diagnosis control terminal
A/C load signal
Intercooler water spray (auto)
Idle speed control servo
(stepper motor)
No.2, No.3 ignition coil
Fuel pump relay 2
Oxygen sensor heater (front)
Tachometer
Alternator G terminal
Engine warning lamp
(check engine lamp)
EGR control solenoid valve
Engine control relay
Purge control solenoid valve
Diagnosis output terminal
Detonation sensor
No.1, No.4 ignition coil
A/C relay
Fan controller
(radiator)
Diagnosis output terminal
(for MUT-II)
Idle speed control
Ignition timing control
Engine control relay control
Fuel pump relay control
Fan relay control
(A/C condenser)
A/C relay control
Fan motor control
(radiator)
Alternator control
Engine warning lamp control
EGR control
Purge control
Diagnosis output
RAM data transmission
Barometric pressure sensor
Vehicle speed sensor
Camshaft position sensor
Crank angle sensor
Intercooler water spray (manual)
Oxygen sensor (front)
Oxygen sensor (rear)
Air flow sensor filter reset control
Fuel pressure control
Turbochanger control
Secondary air control
Intercooler water spray control
Oxygen sensor heater control
Secondary air control solenoid valve
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