Being the common rail type gasoline fuel injector for the common rail type

摘要

The high pressure fuel feed pump (14) it possesses, the fuel is pressurized in the pumping interior, the high pressure passage (16) the flow increase vessel which is provided (22) includes the common rail (18) in the common rail type gasoline fuel injector which is supplied the high pressure passage (16) through. Ideally, as for the flow increase vessel to possess cranking state, in this cranking state, the primary piston (32) only primary pressure of the pumping room it is added, as it possesses the relatively small effective crosssectional area, the secondary piston (44) contacts this primary piston, it can add only common rail pressure, when it possessed the relatively big effective crosssectional area, primary cubic measure being moved because of this, the primary piston (32) with the primary pressure from the pumping room the secondary piston (44) toward facing, the secondary piston (44) the fuel of the secondary cubic measure which is larger than the aforementioned primary cubic measure the common rail (18) insideIt moves.