Base Engine Technical Information ==>
M211200100199700ENG
The
MIVEC consists of the parts shown in the illustration.
This system continuously varies and optimally controls the opening and closing timing of the individual inlet and exhaust valves, in order to improve torque and power output in all speed ranges.
MIVEC (Mitsubishi Innovative Valve Timing Electronic Control System) MULTIPOINT FUEL INJECTION <4B1>
Base Engine Technical Information ==>
M213202350087000ENG
The
MIVEC system effects a continuously variable control on the intake and exhaust valve timing (the valve opening period remains unchanged).
MIVEC enables valve timing control that is optimal for the operating conditions of the engine. Thus, it stabilizes the idle and improves power output and torque in all driving ranges.
System Configuration Diagram
- The engine-ECU assesses the driving conditions of the engine by way of the signals input by sensors.
- Based on the assessed information, the engine-ECU outputs duty cycle signals to the inlet oil feeder control valve and exhaust oil feeder control valve in order to control the position of the spool valve.
- By varying the position of the spool valve, the oil pressure can be applied either to the retard or advance chamber, thus continuously changing the phases of the inlet camshaft and exhaust camshaft.
The engine-ECU calculates the detected phase angle by using the signals from the inlet camshaft position sensor and exhaust camshaft position sensor.
Operation Conceptual Diagram
The engine-ECU controls the camshaft phase angle in order to attain optimal valve timing that suits the engine load and engine speed.
|
Initial Phase |
Control Direction |
Inlet side |
Most retarded angle |
Advance direction |
Exhaust side |
Most advanced angle |
Retard direction |