Title:
CONTROL DEVICE AND PROGRAM FOR CONTROLLING FUEL INJECTION VALVE
Document Type and Number:
WIPO Patent Application WO/2020/144958
Kind Code:
A1
Abstract:
The purpose of the present invention is to assess the state of a movable part of a fuel injection valve during a period from the end of a preceding injection to the start of a following injection. To achieve this purpose, a control device 101 for controlling a fuel control valve includes a control unit 102. The control unit 102, after a valve body 301 has contacted a valve seat 302 and closed, energizes a coil 303 through a switching operation, in a state in which a movable part 306 is displaced in a direction away from a fixed part 310, and, on the basis of a change in the length of time taken for a drive current being supplied to the coil 303 to change to a target current value after the start of application of a drive voltage to the coil 303, performs a process to detect an initial position return timing at which the movable part 306 reaches an initial position after the valve body 301 has closed.
Inventors:
IIZUKA AKIRA (JP)
YOSHINARI YUKIHIRO (JP)
ITABA FUMIHIRO (JP)
YOSHINARI YUKIHIRO (JP)
ITABA FUMIHIRO (JP)
Application Number:
PCT/JP2019/046279
Publication Date:
July 16, 2020
Filing Date:
November 27, 2019
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F02D41/20; F02D41/34; F02M51/00; F02M51/06; F02M51/08; F02M61/10
Foreign References:
| JP2008280876A | 2008-11-20 | |||
| JP2014129817A | 2014-07-10 | |||
| JP2016196893A | 2016-11-24 | |||
| JP2017106354A | 2017-06-15 | |||
| JP2017014944A | 2017-01-19 |
Attorney, Agent or Firm:
TODA Yuji (JP)
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