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The structure and operation is basically the same as that of the 6B31 - MPI - engine.
Refer to GROUP 13C - Multipoint fuel injection (MPI) - Actuator  .
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The structure and operation is basically the same as that of the 6B31 - MPI - engine.
Refer to GROUP 13C - Multipoint fuel injection (MPI) - Actuator .
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Refer to GROUP 16 - Ignition System - Ignition Coil .
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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 - Evaporative Emission Control
System .
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The inlet oil feeder control valve is installed on the left side of the cylinder head.
Receiving the duty signal from the engine-ECU, the inlet oil feeder control valve moves the
spool valve position and divides the oil pressure from the cylinder block into the advanced
chamber and the retarded chamber of the V.V.T. sprocket as well as continually changes the inlet
camshaft phase. The spring makes spool valve stop at the position where the inlet camshaft is
at the most retarded angle when the engine is stopped. The engine-ECU moves the spool valve position
by increasing and decreasing ON duty ratio of the inlet oil feeder control valve and allows
the inlet camshaft to be at the target phase angle. When the duty ratio increases, the spool
valve moves. The sprocket rotates toward the advanced angle side. When the duty ratio decreases,
the sprocket rotates toward the retarded angle side. When the medium duty ratio, at which the
spool valve is at the medium position, is achieved, all the oil passages are closed. This allows
the phase angle to be kept constant. The engine-ECU changes and controls the duty ratio in accordance
with the engine operation to get the optimum phase angle.
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The exhaust oil feeder control valve is installed on the right side of the cylinder head.
Receiving the duty signal from the engine-ECU, the exhaust oil feeder control valve moves the
spool valve position and divides the oil pressure from the cylinder block into the advanced
chamber and the retarded chamber of the V.V.T. sprocket as well as continually changes the exhaust
camshaft phase. The spring makes spool valve stop at the position where the exhaust camshaft
is at the most advanced angle when the engine is stopped. The engine-ECU moves the spool valve
position by increasing and decreasing ON duty ratio of the exhaust oil feeder control valve
and allows the exhaust camshaft to be at the target phase angle. When the duty ratio increases,
the spool valve moves. The sprocket rotates toward the retarded angle side. When the duty ratio
decreases, the sprocket rotates toward the advanced angle side. When the medium duty ratio,
at which the spool valve is at the medium position, is achieved, all the oil passages are closed.
This allows the phase angle to be kept constant. The engine-ECU changes and controls the duty
ratio in accordance with the engine operation to get the optimum phase angle.
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The structure and operation is basically the same as that of the 6B31 - MPI - engine.
Refer to GROUP 13C - Multipoint fuel injection (MPI) - Actuator .
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