Abstract
This paper presents a new high-pressure generation method which relies on a pump driven by a freely moving spool in a hydraulic manner. A strong acceleration of the spool gives a higher rate of delivery at the pipeline inlet, and thus induces strong pressure waves leading to a higher oil pressure at the closed end of the pipeline. The performance of the proposed system is studied using a method of characteristics. The results show that at a given mass of the spool and the plunger, the highest pressure pulse can be achieved at a combination of an inlet dead volume and an inlet-outlet area ratio of the convergent pipeline. It is also suggested that the present method is applicable to a high-pressure fuel injection system for diesel engines.
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