Title page for ETD etd-12142010-034953

Type of Document

Master's Thesis

Author

König, Daniel Hermann

Author's Email Address

koenig@vt.edu

URN

etd-12142010-034953

Title

Optimization of the Control Strategy for a Range Extender Vehicle

Degree

Master of Science

Department

Mechanical Engineering

Advisory Committee

Advisor Name	Title
Ferris, John B.	Committee Member
Nelson, Douglas J.	Committee Member
Rinderknecht, Stephan	Committee Member
Winner, Hermann	Committee Member

Keywords

control strategy
range extender
hybrid vehicle
optimization

Date of Defense

2010-12-21

Availability

restricted

Abstract

The Subject of this work is the optimization of the control stratgy for a Plug-In Range Extender in
order to decrease CO2 emissions with respect to the regulations. Therefore, the vehicle is
equipped with a gasoline combustion engine, a high voltage battery and two electric motors. One
electric motor propells the front axle and the other one is connected to the combustion engine to
generate electric power. The control is restricted by customer requirements due to the concept of
the vehicle.
A Model-in-the-Loop is created to simulate the control strategy with support of a battery model.
Therefore, the control strategy is optimized in a Matlab/Simulink environment. The simulation
results are compared to tests on the dynamometer rig. The optimization highly depends on the
specific goal function, which can be a global optimization or a local minimum to balance the State
of Charge. Furthermore, customer related drive cycles are taken into account to analyze the
control strategy.

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