Patent ID: 7131427
Filing Date: 2006-11-07
Classification: F02M

Abstract:
1. A common-rail-type fuel injection device for supplying fuel to an internal combustion engine comprising: first injectors mounted on a first cylinder block having a plurality of first cylinders, each first injector supplying high-pressure fuel to each first cylinder; second injectors mounted on a second cylinder block having a plurality of second cylinders, each second injector supplying high-pressure fuel to each second cylinder; a fuel supply pump for supplying high-pressure fuel; a first common rail for accumulating the high-pressure fuel supplied from the fuel supply pump and for supplying the accumulated high-pressure fuel to the first injectors; and a second common rail for accumulating the high-pressure fuel supplied from the fuel supply pump and for supplying the accumulated high-pressure fuel to the second injectors, wherein: the first common rail and the second common rail are connected in series through a first orifice, a connecting passage and a second orifice, the first orifice being integrally formed with the first common rail at a position where the connecting passage is connected to the first common rail and the second orifice being integrally formed with the second common rail at a position where the connecting passage is connected to the second common rail; and the high-pressure fuel is directly supplied to the first common rail from the fuel supply pump and to the second common rail from the first common rail through the first orifice, the connecting passage and the second orifice.