Title:
INJECTION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2020/116427
Kind Code:
A1
Abstract:
An injection control device for an internal combustion engine (70) controls a fuel injection amount from a fuel injection valve (20) by changing a lift amount of a nozzle needle (31). The injection control device includes a drive control unit that controls a lift speed of the nozzle needle (31) in a variable manner, on the basis of a drive signal. In at least one of a lift increasing period during which the lift amount of the nozzle needle (31) is changed to an increasing side in response to a valve opening command for the fuel injection valve (20) and a lift decreasing period during which the lift amount of the nozzle needle (31) is changed to a decreasing side in response to a valve closing command for the fuel injection valve (20), the drive control unit performs speed change control in which the lift speed of the nozzle needle (31) is controlled at a lower speed in a period during which the nozzle needle (31) is located in a first lift region close to a full lift position than in a period during which the nozzle needle (31) is located in a second lift region in which the lift amount is less than in the first lift region.
Inventors:
YUN CHUSONG (JP)
KAWAMURA JUN (JP)
KAWAMURA JUN (JP)
Application Number:
PCT/JP2019/047167
Publication Date:
June 11, 2020
Filing Date:
December 03, 2019
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
F02M47/00; F02D41/04; F02D41/20; F02D41/38; F02M61/10
Foreign References:
| JP2018003794A | 2018-01-11 | |||
| JP2018003796A | 2018-01-11 | |||
| JP2016205277A | 2016-12-08 | |||
| JP2016089652A | 2016-05-23 |
Attorney, Agent or Firm:
YAMADA, Tsuyoshi (JP)
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