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
  • control strategy
  • range extender
  • hybrid vehicle
  • optimization
Date of Defense 2010-12-21
Availability restricted
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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