Feasibility Study of Impulse Amplification System for Probable Diesel Fuel Injection Application

Evaluation of a new concept of fuel injection in Diesel engines is presented in this paper. Different fuel injection systems available in market today have their own inherent energy loss in the fuel injection process and limitations in terms of maximum possible pressure at lower engine speeds. It is clear that any advancement to existing fuel injection system or introduction of new systems with better performance on energy efficiency will have a major influence on the market share.

A relatively new concept of using water-hammer for fuel injection is studied in this present work and the findings have been recorded. Comparison of simulation and experiment results aided the evaluation of simulation model against system performance on bench.

It is concluded that possibility of harnessing energy from water-hammer exists even though the phenomenon itself is considered a loss making one. It is also seen that there exists a definite relation between source pressure in the system, control valve operating current and hence, peak pressure possible from the system. Closer correlation between simulation and experiment could be achieved. A look at the energy consumed by the system in the process of fuel injection indicates that the system is not very efficient. However, a system working on a denser fluid would be a promising alternative.