E-trailer

This page provides the steps on how to model e-trailer project from e-Traction. e-trailer project is a concept project from e-Traction in which e-trailer is a normal trailer that has an electric motor mounted to one of its axle.
The ultimate goal of this project is to increase energy efficiency [kWh/km] hence reducing operating cost.

Creating the simulation

All of the component modules used in this simulations can be downloaded from (insert e-trailer folder)
The first step in creating this simulation is the same as the example simulation for Parallel Hybrid vehicle simulation. Click here to learn more.

Test scenarios

The test scenarios that will be used for this simulation is the so-called WHVC (World Harmonized Vehicle Cycle).
To get the same result as the simulation result presented below, do not change any global surrounding environment variable inside the parameter_main file.

ECU

A simple control algorithm has been developed and implemented into the e - trailer model in order to control the energy distribution between the Internal Combustion Engine and the Electric Machine. The control algorithm used the accelerator and brake pedal position to determine the demanded torque by the vehicle so that it can follow the desired driving cycle. The amount of throttle and brake required was calculated by the driver model which also includes the gear shift logic that calculates the required gear number for a certain moment. The electric machine is used together with the I.C.E. to achieve the demanded torque when the ECU determined that the demanded torque is above the maximum capability of what the engine can supply. If the state of charge of the battery is lower than the minimum charge value, the electric machine will be used as a generator to charge the battery. The electric machine is also used for braking the vehicle when possible, however, mechanical brakes will be used when the braking from the electric machine is not sufficient.

Plant model

The plant model for e-trailer project is split up into two group, those are the truck and the trailer.

e-trailer plant model.

The vehicle topology for e-trailer is similar to the Parallel Hybrid vehicle example. However, the electric motor in e-trailer is connected to the trailer wheel while the Parallel Hybrid vehicle connect the electric motor to the mechanical gear which connects both engine and electric motor together.