Kraftstoffversorgungssystem

摘要

A fuel supply system for a direct injection engine which has a variable capacity single cylinder plunger pump and two fuel rails (53a, 53b). There are disposed orifices (58, 58') at the upstream side inlets of the both fuel rails (53a, 53b), respectively. At the opposite sides to the inlet sides, the fuel rails (53a, 53b) are interconnected with each other by a connecting pipe (57). By the fuel supply system, it is capable of increasing a characteristic frequency of the fuel columns, and of stabilizing, suppressing, and smoothing out pressure pulsation in the fuel rails (53a, 53b), thereby reducing uneven fuel injections into the cylinders. The system may have a cam (100) which drives a plunger (2) of a high pressure fuel pump (101) to reciprocate once for every two combustion in two engine cylinders.