Fuel injection apparatus

Abstract

In a fuel injection apparatus 1, a fuel injection rate from which is controlled by a fuel pressure, a branch pipe 11 comprising a tubular member with the tip end closed is provided between a second pressure control valve 9 and a second pressure sensor 10. The branch pipe 11 extends in a direction along a flow direction of the fuel just before the branch pipe 11, and has a capacity not less than one fifth of that of a fuel flow path 22 between the second pressure control valve 9 and a fuel chamber 17. When a pressure difference in the pressure control valve 9 becomes larger and vibration of the fuel pressure is generated, the branch pipe 11 absorbs and reduces the vibration. As the vibration of the fuel pressure is reduced, a stable fuel injection rate is realized.

Dependencies are inferred from the claim text.