13-8
(1) MPROP (rail pressure control valve)
CAUTION
• Be sure to connect the MPROP (rail pressure control valve)
connector to the engine harness before starting the engine.
If the engine were started with the MPROP connector not
connected, control of the supply pump by the engine elec-
tronic control unit would not be possible and a fault would
ensue.
• The MPROP receives fuel from the feed pump and feeds fuel to-
ward the plungers of the supply pump in such a quantity that the
fuel pressure (target common rail pressure) corresponds to that
required by the engine electronic control unit.
• When the MPROP is not operating, i.e., when current is not flow-
ing, fuel flows at its maximum rate. When current flows, the pis-
ton in the MPROP is pressed down such that fuel is not fed
toward the plungers.
• The engine electronic control unit controls the ratio of current-off
time (duty ratio).
STRUCTURE AND OPERATION
M
itsubishi 6M70 Engine Parts contact:
email: EngineParts@HeavyEquipmentRestorationParts.com
Phone: 269 673 1638
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