Setting suitable requirements for a 1-cylinder research engine control system
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Typ
Examensarbete för masterexamen
Program
Automotive engineering (MPAUT), MSc
Publicerad
2019
Författare
Ståhlberg, Karl
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
The combustion in modern engines are controlled by electronic systems, with the
electronic control unit, ECU, as the main component to control and give commands
to the system. The ECU is divided into hardware and software. Being independent
of complex, licensed and commercial software and hardware is crucial for experimental
research in order to eliminate sources of errors and to minimize the number of
parameters that influences the accuracy of the tests performed. The ECU interact
with several other components and need to be compatible with those.
This study will investigate what parameters that are crucial in order to control a
high pressure direct injection system for a one-cylinder test engine at the Division
of Combustion and Propulsion Systems at Chalmers University of Technology in
Göteborg, Sweden. The study will investigate how the current system works in
order to put specifications of the new system including sample rate, current and
voltage values, frequency of the signals and threshold values for different commands
given by the ECU.
Today, the ECU used at this specific engine has a licensed software that is designed
for and restricted to the hardware it is used in. It is made by a manufacturer that
does not let the user edit the code or functionality of the software and therefore the
hardware gets restricted as well. The study will set up requirement specifications
in order to be able to and give recommendations of how to design a new control
system for the 1-cylinder research engine.
Beskrivning
Ämne/nyckelord
electronic control unit , signal system , sample rate , spike value , hold value , direct injection