Title:
燃料ポンプ制御装置
Document Type and Number:
Japanese Patent JP7074003
Kind Code:
B2
Abstract:
A lower limit setting portion of a fuel pump control system sets a lower limit value depending on an engine operating mode. For example, it sets a duty ratio of 0% as the lower limit value, when the engine operating mode is in a STOP mode in a turned-on condition of an ignition switch. A duty-ratio calculating portion carries out a feedback control in order that an actual fuel pressure comes closer to a target fuel pressure by use of the lower limit value and calculates a duty ratio for driving a fuel pump by the feedback control. An abnormal condition determining portion determines an abnormal condition based on the duty ratio and pump current. The abnormal condition determining portion further determines based on a remaining fuel amount whether the abnormal condition is caused by a disconnection or whether the abnormal condition is caused by an idling operation of the fuel pump due to fuel shortage.
Inventors:
Takuya Sugie
Makoto Asai
Makoto Asai
Application Number:
JP2018179063A
Publication Date:
May 24, 2022
Filing Date:
September 25, 2018
Export Citation:
Assignee:
株式会社デンソー
International Classes:
F02D45/00; F02D41/22; F02M37/00; F02M37/08
Domestic Patent References:
| JP2015113707A | ||||
| JP2007126986A | ||||
| JP2011072057A | ||||
| JP2008038895A |
Foreign References:
| WO2011001478A1 |
Attorney, Agent or Firm:
Kazuyuki Yahagi
Taihei Nonobe
Takanori Kubo
Taihei Nonobe
Takanori Kubo