公开(公告)号：US20220412295A1

公开(公告)日：2022-12-29

申请号：US17847412

申请日：2022-06-23

申请人： ZAMA JAPAN KABUSHIKI KAISHA

发明人： Hideki Watanabe ,  Hiroo Ubukata

IPC分类号： F02M55/00 ,  F02M51/06

摘要： An electronically controlled fuel injection device that achieves reduced component count, simplified construction, and cost reduction while promoting discharge of vapor that is generated in a pressurizing chamber. With a fuel passage from a fuel intake pipe into a pressurizing chamber and a return passage that is a discharge passage for vapor generated in the pressurizing chamber, and a plunger with a prescribed reciprocating operation having a standby position set as a position enabling fuel supply and vapor discharge, the electronically controlled fuel injection device eliminates the need for an inlet check valve and promotes the discharge of vapor that is generated when fuel is supplied from the fuel intake pipe to the pressurizing chamber.

公开(公告)号：US20230087694A1

公开(公告)日：2023-03-23

申请号：US17889532

申请日：2022-08-17

申请人： ZAMA JAPAN KABUSHIKI KAISHA

发明人： Hiroo Ubukata ,  Toshinobu Shimoyama

IPC分类号： F02M51/06 ,  F02M37/00 ,  F02M61/20

摘要： A method to prevent generation of impact noise caused by an armature contacting a stopper due to a return spring and damage of the armature and a stopper without adding a part. Excitation of an electromagnetic coil 4 causes an armature 9 at a standby position to move in a plunger 7 direction so as to move the plunger 7 inserted in a pressurizing chamber 3 in a tip end direction against a return spring 8 to a level such that fuel is not injected from an injection nozzle 2. Fuel supplied from a fuel tank to the pressurizing chamber 3 through a fuel intake pipe 10 and inlet check valve 11 is pressurized and vapor included in the fuel inside the pressurizing chamber 3 is discharged to a fuel return pipeline 14 through a spill valve 12 and return passage 13. Excitation of the electromagnetic coil 4 is stopped, and then the electromagnetic coil 4 is re-excited prior to the armature 9 and plunger 7 reaching the standby position due to the return spring 8, such that the return speed of the armature 9 is reduced and an impact when the armature 9 contacts a stopper 15 is mitigated.