Supercharging Pressure Control - Mitsubishi Lancer Evolution VIII MR User Manual

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1. Supercharging pressure control

The maximum torque has been increased, compared to the 4G63-DOHC-T/C engine in the current Lancer Evolution VIII, by
installing an additional wastegate solenoid valve (increased from 1 to 2 valves).
Battery
Air flow
sensor
Crank angle
sensor
Knock
sensor
Engine
ECU
By adding a parallel No.2 wastegate solenoid valve to the previous system, provides extra relief capacity for the pressure
applied to the wastegate actuator thus increasing the range of supercharging pressure..
The engine ECU raises the supercharging pressure even further, thus raising the maximum torque, by driving the No.2
wastegate solenoid valve when the engine approaches maximum torque.
The No.1 wastegate solenoid valve is essentially controlled in the same way as previously.
ENGINE (4G6) – CONTROL SYSTEM (6 M/T)
Secondary air
control solenoid
valve
Secondary
air valve
Ignition
switch
Air
intake
No. 2 wastegate
solenoid valve
Bypass valve
Intercooler
Turbocharger
Wastegate
actu-
No. 1
ator
wastegate
solenoid
valve
Vacuum tank