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TEO-540-A1A Engine Installation and Operation Manual
EECS Operation
The EECS:
• Controls engine operation in accordance with Lycoming's established engine operating
specifications
• Increases engine performance for:
o More balanced distribution of power across each cylinder (balanced air-fuel mixture)
o More efficient operation at each engine power
o More consistent engine starts under all operating conditions, especially hot and cold soak
conditions
• Automatically adjusts fuel mixture based on operation setpoints and engine conditions to:
o Independently controls each engine cylinder to prevent high CHTs
o Enhanced fuel efficiency - Enables the engine to run at best power or best economy
depending on engine operation setpoint.
• Prevents overspeed and overpressure conditions to reduce pilot intervention
• Enables more stable engine operation thru automatic adjustments with changing
environmental conditions such as changes in altitude, temperature, or changes in engine load
• Supplies more detailed feedback about engine operating conditions and history
• Automatically does engine pre-flight tests
• Automatically uses redundant features when necessary
• Supplies integrated functionality such as propeller control
• The EECS isolates engine faults by detection of the following:
o Short and open circuit detection of specified sensors and actuators
o Out-of-range hardware failures of sensors and actuators
o In-range failures of specified sensors
o Conditions outside specified operation range (low oil pressure and high oil temperature).
• The EECS records the following engine information:
o Fault information sent to pilots
o Fault information to service personnel
o General engine lifetime usage and performance information (histogram at various
operating points, maximum values over life, etc.)
NOTICE: Software and programmed calibration data within the ECU control how the EECS
adjusts actuators based on sensor inputs.
© 2018 Avco Corporation. All Rights Reserved
October 2018
THEORY OF OPERATION
Theory of Operation
Page 15
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