Axle Power Modes Overview

The activities of Axle Power are depicted by three categories:

• System Modes

• Operation Modes

• Energy Modes (ePower Axle)

The Energ-e Pack is based on three System Modes. They describe and determine the states of the system: How the system starts, operates, and shuts down its functions and operation. The mode OFF has always an exceptional cause: If Axle Power System is OFF, either Axle Power has not been used for a longer period or there is some problem with the system, an event of emergency, or there is ongoing maintenance work in the open Energ-e Pack box (Service Switch switched off).

Axle Power runs in three Operation Modes that determine how the Energ-e Pack supplies power to the Trailer Refrigeration Unit (TRU): Road, Shore Power, and Parking Mode. Road Mode is the most important and unique Axle Power Operation Mode. In Road Mode, Axle Power generates electric energy via ePower Axle for the Trailer Refrigeration Unit (TRU).

Depending on the energy demand and driving situation of the vehicle and the Trailer Refrigeration Unit (TRU), the ePower Axle Generators produce varying amounts of electrical energy. Generating and provisioning electrical power is controlled using three Energy Modes: Active, Recuperation, and Passive.

Axle Power Modes automatically change, activate and deactivate themselves. They depend on certain conditions — if these particular conditions are met, then the corresponding Axle Power Mode starts or changes to another one.
Example: You turn the ignition on. This forces Axle Power to start working.

These processes are triggered and managed by the Axle Power System itself. You do not have to do anything.