Hitachi ZW180, Technical Manual

Page: 108 / 374

SYSTEM / ECM System
T2-2-2
FUEL INJECTION CONTROL
Purpose: To control the fuel injection according to the
command signal from MC.
Operation:
1. ECM detects the signals from engine speed
sensor, engine position sensor, ambient pressure
sensor, coolant temperature sensor, intake
manifold pressure sensor, Intake manifold
temperature sensor, engine oil pressure switch
and common rail pressure sensor, and detects the
engine operating condition.
2. When detecting the signal from MC, ECM
processes and controls the fuel injection of
injector while detecting the engine operating
condition.
3. The solenoid valve is attached to the injector. The
solenoid valve controls operation of start and stop
for injection according to the signal form ECM.
NOTE: MC sends the command signals as shown
below.
• Target Engine Speed Value
• Torque Curve Switching Command Signal
(Refer to the Control System group.)