Doosan D20S-5 Operation & Maintenance Manual page 87

G420F Engine and G424F Engine G420F Engine and G424F Engine
EMS (Engine management system) of G420F engine and G424F engine is an open loop LP system and/or EMS (Engine management system) of G420F engine and G424F engine is an open loop LP system and/or
closed loop gasoline system. 3-way catalytic muffler is not used for th closed loop gasoline system. 3-way catalytic muffler is not
LPG regulator and the mixer are operated in open loop as no mixture adjustments are made by the SECM. LPG regulator and the mixer are operated in open loop as no mixture adjustments are made by the SECM.
Manifold pressure from the TMAP, rpm from the crank position sensor and throttle position is used by the Manifold pressure from the TMAP, rpm from the crank position sensor and throttle position is used by the
SECM to calculate load. Feedback from the electronic throttle is still provided to the SECM by the throttle SECM to calculate load. Feedback from the electronic throttle is still provided to the SECM by the throttle
position sensors (TPS). position sensors (TPS).
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EMS schematic of G420F Dual Fuel engine EMS schematic of G420F Dual Fuel engine
used for this system. is system.
Operation Section Operation Section