公开(公告)号：US10557437B2

公开(公告)日：2020-02-11

申请号：US15776934

申请日：2016-11-10

申请人： Yanmar Co., Ltd.

发明人： Ryota Iwano ,  Satoshi Hiroya ,  Hiroyuki Machiyama ,  Kosuke Hara ,  Ryosuke Okamoto

IPC分类号： F02D41/40 ,  F02D41/20 ,  F02M59/20 ,  F02D41/06 ,  F02M59/36 ,  F02M59/46

摘要： A fuel injection pump (100) provided in a diesel engine, including: an electromagnetic spill valve (20) configured to adjust a fuel injection amount by releasing a pressurized fuel with opening/closing of a spill valve body (23); and an ECU (Engine Control Unit, 50) configured to form a current waveform of drive current of the electromagnetic spill valve (20). The ECU (50), during the warm state, detects a valve-close timing of the electromagnetic spill valve (20), forms an optimum current waveform of drive current based on the detected valve-close timing, and applies drive current with thus formed optimum current waveform to the electromagnetic spill valve (20), whereas, during the cold state, the ECU (50) applies only drive current with a pre-set current waveform to the electromagnetic spill valve (20).