DEVELOPMENT TRENDS OF HIGH PRESSURE  COMMON-RAIL PUMPS

Rafał Smolec; Mateusz Bor; Wojciech Karpiuk; Marek Idzior

Rafał Smolec Poznan University of Technology, Faculty of Machines and Transport
Mateusz Bor Poznan University of Technology, Faculty of Machines and Transport
Wojciech Karpiuk Poznan University of Technology, Faculty of Machines and Transport
Marek Idzior Poznan University of Technology, Faculty of Machines and Transport

Keywords: common-rail, emission, fuel pump, lubricity

Abstract

Due to systematic reduction of he permissible levels of harmful and toxic substances in the exhaust gases, particulary of which particulate matter appears to be unfavorable, there is a continuing need to improve the fuel injection parameters. One of the factors determining the correct fuel injection is the injection pressure, which strongly depends on the design of the common-rail pump. This article presents the latest common-rail pump solutions for automotive vehicles and prototype constructions in terms of improved system efficiency and reliability. The latest pump solutions utilize one pumping section and allows to inject pressure up to 3000 bar, while synchronizing the delivery phase with the fuel injection phase. In the further development of the injection systems, hybrid solutions are expected to form a combination of unit injector and common rail systems

Keywords
common-rail, emission, fuel pump, lubricity