الفهرس 
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Abstract
The primary objectives of this thesis were to achieve a good understanding of the theory describing the diesel injection system and to use this understanding to develop a theoretical con¬trol method by which design changes could be determined to elimi¬nate undesirable system characteristics (i.e. after-injection).
In this study, the after-injection phenomenon was experi¬mentally surveyed. Then a computer simulation model was developed to predict the theoretical system performance. The results from the computer simulation were compared with experimental data taken on actual test equipment. Then, an investigation of a theoretical control parameter was carried out which led to the formulation
of a design program that used the injection system average elas¬tic energy as the control parameter. Two injection system design changes were investigated. The first was the addition of a con¬trol valve in the pump delivery chamber which is used to release the system excess elastic energy in a controlled manner and elimi¬nate after-injection. The second change centered on re-designing the pump ppill port to control the rate of fuel spill in order to eliminate after-injection. The results of both changes were deter¬mined and were verified using the simulation program.
The study included three major phases; namely, experimental survey of the after-injection phenomenon, computer simulation of the injection system, and the theoretical control of the after-injection