A Study of Characteristics at the End of Injection in a Diesel Engine Fuel System : 2nd Report, Analysis of Secondary Injection and Delay of Injection End

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This paper deals with the secondary injection and the delay of injection end. Experimental studies show that the delay of injection end becomes larger as the engine speed increases and that the minimum engine speed at which a secondary injection takes place changes according to the control notch, delivery valve design, fore-opening pressure at the injection valve, pipe or nozzle area, etc. On the assumption that there is a certain relation between pressures on the pump side and on the injection valve side, theoretical equations of secondary injection and delay of injection end are obtained by using the solution mentioned in the previous paper. Assuming suitable factors, the results obtained from these equations almost agreed with the experimental results. Thus we can predict by calculation the secondary injection and the delay of injection end in any fuel injection system.
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