Patent ID: 6592052
Filing Date: 2003-07-15
Classification: F02M

Abstract:
A fuel injection device comprising:a cylindrical valve housing having a fuel inlet at an end thereof, a first fuel passage, a second fuel passage, a nozzle hole at the other end thereof and a valve seat disposed upstream of said nozzle hole; a valve needle disposed inside said valve housing between said first and second fuel passages, said valve needle having a hollow portion connected to said first fuel passage and plurality of fuel apertures connecting said hollow portion and said second fuel passage, a head portion disposed to be seated on or unseated from said valve seat thereby intermittently injecting fuel through said nozzle hole; and a heater, disposed around said valve housing downstream of said plurality of fuel apertures and upstream of said valve seat, for directly heating a portion of said valve housing; wherein nozzle needle has a bulging portion disposed opposite said heater to narrow cross-section of said second fuel passage.