QUOTE(K3nnYkl82 @ Dec 5 2011, 10:29 AM)
photo-shoping ...
want to show that .. "I DUNNO ABOUT ECU"
hehehe....faster than me tim....lol....
QUOTE(turbocharged @ Dec 5 2011, 10:34 AM)
er, guys, at what RPM mivec open?
From the 4B1 engine family onward, MIVEC has evolved into a continuous variable valve timing (CVVT) system (dual VVT on intake and exhaust valves).[9] Many older implementations only vary the valve timing (the amount of time per engine revolution that the intake port is open) and not the lift. Timing is continuously independently controlled to provide four optimized engine-operating modes:[9]
Under most conditions, to ensure highest fuel efficiency, valve overlap is increased to reduce pumping losses. The exhaust valve opening timing is retarded for higher expansion ratio, enhancing fuel economy.
When maximum power is demanded (high engine speed and load), intake valve closing timing is retarded to synchronize the intake air pulsations for larger air volume.
Under low-speed, high load, MIVEC ensures optimal torque delivery with the intake valve closing timing advanced to ensure sufficient air volume. At the same time, the exhaust valve opening timing is retarded to provide a higher expansion ratio and improved efficiency.
At idle, valve overlap is eliminated to stabilize combustion.
Mitsubishi's 4N1 engine family is the world's first to feature a variable valve timing system applied to passenger car diesel engines
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