MTU 12 V 4000 L63 Operating Instructions Manual page 31

Compressor bypass (F-series)
• Controls throttle reserve, blocks compressor pumps
Ignition system IC922
• Adjusts ignition timing for cylinders
Anti-knock control AKR
• Controls monitored cylinders with regard to knock characteristics. If knocking is found, the ignition tim‐
ing is retarded on the cylinder in question. If this does not result in an improvement, the power is re‐
duced.
Gas control valve TecJet50+
• Controls the required amount of gas
Mixture throttles ProAct
• The mixture throttles in the mixture lines which are controlled by the engine governor
MS150058/01E 2012-07 | Product Summary | 31