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The injectors mounted on the cylinder head inject the exact amount of fuel into the engine
cylinders at correct pressure and precise injection duration calculated by the engine-ECU.
The injectors have a solenoid valve and an individual cam respectively.
The movement of the individual cam on the exhaust camshaft generates the high-pressure
fuel in the each injector by moving the exhaust camshaft.
The engine-ECU sends a signal to the solenoid valve of each injector in order to control
optimally the injection amount and injection timing of this high-pressure fuel in accordance
with engine conditions.
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The variable geometry control solenoid valve which is mounted on the right front fender
shield is a duty solenoid valve.
This solenoid valve controls the boost pressure by regulating the vacuum of the variable
geometry actuator.
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The throttle valve control servo integrated into the throttle body opens and closes the
throttle valve.
The engine-ECU controls the throttle valve control servo by changing the electrical currents
going through the motor coil.
This control regulates amount of the exhaust gas recirculation by inducing the differing
pressure between intake and exhaust.
It is also possible to stop the engine smoothly.
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The swirl control solenoid valve which is mounted on the right front fender shield is
an ON/OFF control type solenoid valve.
The engine-ECU turns on the solenoid valve at slow engine speeds and then closes the swirl
control valve by applying the vacuum pressure to the swirl control actuator.
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Refer to GROUP 17 - Emission Control - Exhaust Gas Recirculation (EGR)
System  .
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Refer to GROUP 17 - Emission Control - Exhaust Gas Recirculation (EGR)
System .
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