General Information - Mitsubishi Electric Lancer Evolution-VII Workshop Manual

15-2

GENERAL INFORMATION

SUPERCHARGING PRESSURE CONTROL
By controlling the duty of the waste gate solenoid valve, the waste gate actuator functions to control the supercharging
pressure. This allows a supercharged pressure matching the engine operation state to be attained. Control is carried
out to prevent excessive supercharging and thereby prevent engine damage.
SECONDARY AIR CONTROL
When decelerating during high-speed travel, the secondary air is introduced into the upstream of the turbocharger
to prevent the turbine speed from dropping and to increase the acceleration responsiveness after deceleration.
The secondary air is introduced into each cylinder of the exhaust manifold to maximize the effect.
Secondary air
control solenoid
valve
Secondary
air valve
Air
inlet
INTAKE AND EXHAUST -
Waste gate
solenoid
valve
General Information
Turbocharger
Waste gate
actuator
Vacuum
tank