Developing interface using C++ language to visualize efficiency of hybrid power train and comparison between DEWESoft and AVL Data acquisition systems
Typ
Examensarbete för masterexamen
Program
Automotive engineering (MPAUT), MSc
Publicerad
2021
Författare
Ahmed, Aijaz
Lutimath, Ajanish
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Presently the light-duty vehicle fleet is going through substantial technological changes
in the past few years with new power-train design, alternative fuels, and electrification. Due to the overall efficiency, drivability, stability, quality of comfort, and
stringent emission laws. In the Automotive industry, major research is carried out
to study the overall efficiency of individual power-train. To carry out the research
on these vehicles the major equipment required is the data acquisition system. Data
acquisition systems are used in every field of engineering to test, measure, and perform research in terms of performance, safety, and reliability.
The main purpose and first objective of this thesis is to develop an interface using
C++ language to visualize the efficiency of a hybrid powertrain online and implement it in the DEWESoft software, along with which we will be exploring the
measurement techniques, sensors, DAQ hardware, and software used. The models
calculate the efficiency in [%] sample-based and also average based for number of
samples, time duration, and number of cycles in the case of Internal combustion en gine. A 3D surface plot to visualize Speed [rpm], Torque[Nm], and efficiency [%] on
X, Y, and Z-axis respectively is a major deliverable. As presently the software lacks
visualization. For the study, a thorough collection of experimental data related to
the hybrid vehicle will be done at the Chalmers test cell. The significant parameters
such as speed[rpm], torque[Nm], fuel flow rate [g/sec], phase,frequency[Hz], three phase current[A] and voltage[V] are recorded using DEWESoft DAQ systems.
The second objective of this thesis is to compare two different DAQ systems i.e.,
AVL and DEWESoft under standard test conditions. For the study, a 3cylinder SI
engine will be used at the Chalmers test cell to record the In-cylinder pressure as a
function of crank angle degree.
As a result of the first objective, the validated C++ models implemented in the
DEWESoft software, which determines the efficiency [%] are delivered. In the future, these models can be used in the field of research and development for hybrid
and electric vehicles. The major findings for the second objective are different parameters which influence the recording and post processing of in-cylinder pressure
data as a function of CAD. A thorough investigation and data analysis of two different DAQ systems, and comparison of measurement accuracy is presented in the
report.
Beskrivning
Ämne/nyckelord
Data acquisition systems(DAQ), C++, Efficiency, Data analysis