Hitachi EX2600-7B Workshop Manual page 6

Symbol / Name
Abbreviation
ACU Aerial Angle Control Unit
BPU Basic Performance Monitoring Unit
FMU Fatigue Monitoring Unit
GSM Global System for Mobile
Communications Controller
WIU Wireless Interface Unit
GPS Global Positioning System
CAN Controller Area Network
EDQR Valve Electric Dual Quick Response Valve
SCR Selective Catalytic Reduction
ECU Electronic Control Unit
NOx Nitrogen Oxide
DEF Diesel Exhaust Fluid
SYMBOL AND ABBREVIATION
Explanation
Aerial angle control unit. ACU controls the circumference check of
the machine by using the monitor.
Basic performance monitoring unit. BPU semiautomatically
measures the basic performance.
Mechanical fatigue monitoring unit. FMU monitors mechanical
fatigue of the structures.
Communication controller. GSM is a type of wireless
communication system, is used in more than on 100 countries
around Europe and Asia, and becomes the factual global
standards of the mobile telephone.
WIU outputs the machine operation data to PC via wireless LAN.
Global positioning system.
CAN communication. CAN is a serial communications protocol
internationally-standardized by ISO (International Organization
for Standardization).
EDQR valve receives command current according to the electric
control lever stroke, flows pilot pressure oil according to this
command current to the control valve, and moves the spool of
the control valve.
The urea SCR system injects diesel exhaust fluid to nitrogen oxide
(NOx) exhausted from the engine and purifies NOx.
Urea SCR system controller. ECU sends the signals from the
sensors of urea SCR system to ECM.
Nitrogen oxide.
Diesel exhaust fluid. The diesel exhaust fluid concentration is 32.5
%, which is specified in ISO22241.
SY-2
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