Concept of a pump for diesel engines fuel supply using hypocycloid drive

Detailed analysis of modern injection pumps used for diesel engines fuel supply shows that for the most part these structures are far from ideal. Therefore authors of the article proposed a completely novel injection pump construction, which uses hypocyclic gears to drive the piston. The purpose of this article is to present this construction. In relation to existing, classic solutions using a cam drive, the construction of the hypocycloid pump is characterized by the minimization of lateral forces at the interface between the piston and the cylinder of the pump section – this aspect is proven in the article. It is also possible to separate the pressing function from the lubrication function in the pump. In addition – the high stroke of the piston in relation to the dimensions of the pump has a positive effect on the output, enabling reduction of the number of pumping sections even in multi-cylinder engines. In the opinion of the authors, this pump is part of the latest trends related to the construction of high-pressure injection systems. (paper)