The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 2020
Filed:
Nov. 10, 2016
Yanmar Co., Ltd., Osaka-shi, Osaka-fu, JP;
Ryota Iwano, Osaka, JP;
Satoshi Hiroya, Osaka, JP;
Hiroyuki Machiyama, Osaka, JP;
Kosuke Hara, Osaka, JP;
Ryosuke Okamoto, Osaka, JP;
YANMAR CO., LTD., Osaka, JP;
Abstract
A fuel injection pump () provided in a diesel engine, including: an electromagnetic spill valve () configured to adjust a fuel injection amount by releasing a pressurized fuel with opening/closing of a spill valve body (); and an ECU (Engine Control Unit,) configured to form a current waveform of drive current of the electromagnetic spill valve (). The ECU (), during the warm state, detects a valve-close timing of the electromagnetic spill valve (), 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 (), whereas, during the cold state, the ECU () applies only drive current with a pre-set current waveform to the electromagnetic spill valve ().