Technical CATERPILLAR – 1000 kVA Page
5
Description UTILITY POWER MODULE
Revision 1.0 1 May 2006
2.2. ADEM
®
A4 Engine Controller
2.2.1. Introduction
The ADEM
®
A4 is an integral part of the innovative ACERT
®
Technology that provides
higher degree of control over a large number of combustion variables than ever before
The ADEM
®
A4 engine system is composed of the ADEM
®
A4 ECM, control software,
sensors, actuators, fuel injectors and interface to the generator system.
The prime benefit of an
ADEM
®
A4 engine system is to better control and maintain the
particulate emissions, both steady state and transient, while improving engine performance.
Advanced Features
_ Isochronous or droop speed control
_ Enhanced performance from fuel injection timing and limiting
_ Adjustable monitoring of vital engine parameters
_ Idle / rated speed setting
_ Programmable speed acceleration ramp rate
_ Adjustable cool down duration
2.2.2. Features
1 - General features
RELIABLE, DURABLE - All ADEM
®
A4 controllers are designed to survive the
harshest environments. Environmentally sealed, die-cast aluminum housing isolates and
protects electronic components from moisture and dirt contamination. Rigorous vibration
testing ensures product reliability and durability. Accuracy maintained from -40° C to +85° C.
Electrical noise immunity to 100 volts/meter. Internal circuits are designed to withstand
shorts to +battery and –battery.
SIMPLE SERVICING –
SIMPLE SERVICING - Each ADEM
®
IV system works in combination with the Caterpillar
ET service tool software to keep the engine operating at peak performance.
_ Displays measured parameters
_ Retrieves active and logged event codes documenting abnormal system operation
• Performs calibrations and diagnostic tests.
• Supports flash programming of new software into the ADEM
®
A4 ECM.
SELF-DIAGNOSTICS
Each ADEM
®
A4 ECM has a full compliment of self-diagnostics. The ECM can detect faults in
the electrical system and report those faults to the service technician for quick repair. Self-
diagnostic capability pinpoints operational problems in need of attention.
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