Outline - Hitachi ZW180 Technical Manual

OUTLINE

ECM (Engine Control Module) receives the signals
from sensors and MC (Main Controller) attached to the
engine.
ECM processes according to the detected signals and
performs the following control to the injector.
• Fuel Injection Control
• Engine Start Control
• Engine Stop Control (Refer to the Electrical
System group.)
SYSTEM / ECM System
ECM
MC
• The high-pressure pump is driven by the engine
and produces high-pressure fuel.
• The common rail distributes high-pressure fuel
produced by the high-pressure pump to the
injector in each engine cylinder.
• The injector injects high-pressure fuel from the
common rail.
Engine Speed Sensor (Crankshaft)
Engine Position Sensor (Camshaft)
Ambient Pressure
Sensor
Coolant Temperature
Sensor
Intake Manifold Pressure Sensor
Intake Manifold Temperature Sensor
Engine Oil Pressure Switch
Common Rail
Pressure Sensor
Common Rail
High-Pressure
Pump
Injector
T2-2-1
T4GD-02-02-001