Title:
FUEL INJECTION CONTROL DEVICE
Document Type and Number:
Japanese Patent JP2018189033
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an electromagnetic valve drive unit which can secure a necessary electromagnetic valve opening time even at the occurrence of an abnormality of a hold current circuit, in a vehicle in which a drive circuit at each cylinder has only one system.SOLUTION: In a fuel injection control device having: a peak current circuit 210 and a hold current circuit 209 for carrying electricity to a drive coil 105 of a fuel injection device; a current detection part 205 for detecting a current flowing to the drive coil; and a high-voltage generation part 206 for making a peak current flow to the drive coil, the fuel injection control device is valve-opened by making the peak current flow to the drive coil through the peak current circuit, and holds the valve-opening by making the hold current flow to the drive circuit through the hold current circuit. The fuel injection control device calculates a peak hold time for making the peak current flow at an abnormality of the hold current circuit by a peak holed calculation part 202e, and makes the peak current continuously flow for the peak hold time.SELECTED DRAWING: Figure 2
Inventors:
SUEHIRO SHINYA
OKAMOTO TAKUTO
OKAMOTO TAKUTO
Application Number:
JP2017092941A
Publication Date:
November 29, 2018
Filing Date:
May 09, 2017
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD
International Classes:
F02D41/22; F02D41/20; F02M51/00
Attorney, Agent or Firm:
Polaire Patent Business Corporation