الفهرس 
Diesel Electronic Piezo Hydraulic Injector System
DESCRIPTION OF THE NEW INJECTIONOnly 14 pages are availabe for public view
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Abstract
In this thesis, an experimental investigation on the possibil ity
of using PC-based electronic delivery valves in the injection
system in diesel engines was carried out. With electronic delivery
valves, one unit of the injection pump can be used to inject the
fuel to the injectors of many engine cylinders. An experimental
set-up was built to test the characteristics of the new electronic
injection system.
In this system, a typical diesel injection pump was modified
and a special distribution unit has been designed and constructed
to handle the fuel from the pump unit to the electronic del ivery
system. The electronic delivery system consists of three solenoid
valves, two of them are used to deliver the fuel to two cylinders
of the engine and the third valve is used to pass the fuel
accumulated in the distribution unit to the fuel tank. Electronic
circuits for the computer interface and for driving the solenoid
valves were designed and constructed. A control software
program was designed and built to control the electronic fuel
injection system. The parallel port was chosen in this work to
link between the injection software and the electronic hardware
section of the present injection system.
Injected fuel rate to each engine cylinder IS controlled by
controlling the open/close timing of each electronic valve during
the fuel injection period of the modified injection pump unit.
The effect of delaying the start of the fuel compression stroke,
ON-Delay period, or advancing the injection stop before the end