Electronic Gearbox Control (EGS)

Electronic Gearbox Control (EGS)

The acronym "EGS" comes from the German name; "Electronic Getriebestuerung" or Electronic Gearbox Control when translated.

The function of an "EGS" transmission control system is to:
- Monitor all operating conditions (input signals),
- Continually asses operating conditions (process input data) and select appropriate operating program for current conditions (programming).
- Activate transmission system components and to communicate with other drivetrain control systems (outputs).

An EGS system's primary requirements are to control the:
- Shift points and shift pressures based on operator selected driving program (A/S/M),
- Shift quality over the lifetime of the transmission through adaptive pressure control,
- Torque converter lock up clutch.

Communication with the engine and traction control systems allows the individual drivetrain sub-systems (engine, transmission, traction control) to function as a single synchronous unit refining all of their individual functional requirements.

Additional system requirements are to activate components or select alternate operating programs for the purpose of:
- Occupant safety,
- Safe guarding drivetrain damage,
- Vehicle emissions,
- and failsafe operation if a system malfunction occurs.