Injector control device

Patent metadata

Field	Value
Publication number	US-2024011449-A1
Application number	US-202218254280-A
Country	US
Kind code	A1
Filing date	Feb 21, 2022
Priority date	Mar 9, 2021
Publication date	Jan 11, 2024
Grant date	—

Abstract

Provided is an injector control device which is capable of setting a preceding injection amount to a fuel injection amount that is less than a main injection amount, while suppressing situations where preceding injections executed prior to a main injection in multi-stage injection are eliminated.
An injector control device 2 includes: an injection amount setting unit 211 that sets, as a total injection amount, a total of fuel injection amounts in multi-stage injection in a single cycle, and sets, as a preceding injection amount, a fuel injection amount in a preceding injection executed prior to a main injection in the multi-stage injection; an energization period setting unit 212 that sets an energization period of an injector 31 based on the fuel injection amounts set by the injection amount setting unit 211 ; and an injector driving unit 213 that controls driving of the injector 31 based on the energization period set by the energization period setting unit 212 . The injection amount setting unit 211 sets a fuel injection amount that is a predetermined percentage of the total injection amount as the preceding injection amount.

First claim

1 . An injector control device that controls driving of an injector that performs multi-stage injection in which fuel injection is divided into a plurality of injections in a single cycle, the injector control device comprising:
an injection amount setting unit that sets, as a total injection amount, a total of fuel injection amounts in the multi-stage injection in the single cycle, and sets, as a preceding injection amount, a fuel injection amount in a preceding injection executed prior to a main injection in the multi-stage injection; an energization period setting unit that sets an energization period of the injector based on the fuel injection amounts set by the injection amount setting unit; and an injector driving unit that controls driving of the injector based on the energization period set by the energization period setting unit, wherein the injection amount setting unit sets a fuel injection amount that is a predetermined percentage of the total injection amount as the preceding injection amount.

2 . The injector control device according to claim 1 , further comprising:
a minute injection amount region determination unit that determines whether the total injection amount is within a minute injection amount region, wherein when the minute injection amount region determination unit determines that the total injection amount is within the minute injection amount region, the injection amount setting unit sets, as the preceding injection amount, the fuel injection amount that is the predetermined percentage of the total injection amount.

3 . The injector control device according to claim 2 ,
wherein when the minute injection amount region determination unit determines that the total injection amount is not within the minute injection amount region, the injection amount setting unit sets, as the preceding injection amount, a predetermined fuel injection amount set in advance.

Assignees

• Kubota Kk

Inventors

• Kobayashi Yasushi
• Matsunobu Shingo
• Suehiro Kiichi
• Nagai Naotaro

Classifications

• F02D41/247

  Behaviour for small quantities · CPC title

• F02D41/402 Primary

  Multiple injections · CPC title

• Y02T10/40

  Engine management systems · CPC title

• F02D41/403 Primary

  with pilot injections · CPC title

• F02D2041/1409

  using at least a proportional, integral or derivative controller · CPC title