Fuel injection control apparatus

Patent metadata

Field	Value
Publication number	US-9822746-B2
Application number	US-201615131517-A
Country	US
Kind code	B2
Filing date	Apr 18, 2016
Priority date	May 15, 2015
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A fuel injection control apparatus is provided with a first valve opening timing determination portion that determines a first valve opening timing on the basis of a collision signal that is included in detected signals of an in-cylinder pressure sensor and indicates a collision between a movable core and a valve element and a second valve opening timing determination portion that determines a second valve opening timing on the basis of another collision signal that is included in the detected signals and indicates a collision between the movable core and a stationary core.

First claim

What is claimed is:

1. A fuel injection control apparatus which controls a fuel injection valve that is equipped with a valve seat, a valve element, a movable core independent of the valve element, and a stationary core stopping displacement of the movable core, the fuel injection control apparatus comprising:
a first valve opening timing determination portion configured to determine a first valve opening timing on the basis of a first collision signal that is included in input signals input from a detection portion detecting an operating state of the fuel injection valve and indicates a timing at which the valve element starts to be opened; and
a second valve opening timing determination portion configured to determine a second valve opening timing on the basis of a second collision signal that is included in the input signals input and indicates a timing at which the valve element is fully opened.

2. The fuel injection control apparatus according to claim 1 , wherein an injection amount of fuel is corrected on the basis of the first valve opening timing and the second valve opening timing.

3. The fuel injection control apparatus according to claim 2 , wherein a valve closing timing is determined on the basis of a third collision signal that is included in the input signals input from the detection portion and indicates a timing at which the valve element is closed, and the injection amount of the fuel is calculated on the basis of the valve closing timing, the first valve opening timing, and the second valve opening timing.

4. The fuel injection control apparatus according to claim 1 , wherein the detection portion is an in-cylinder pressure sensor installed in a cylinder.

5. The fuel injection control apparatus according to claim 1 , wherein the detection portion is a vibration sensor.

6. The fuel injection control apparatus according to claim 1 , wherein a failure of the detection portion is detected on the basis of the first collision signal or a fourth collision signal indicating a timing at which the movable core is stopped at the time of valve closing.

Assignees

• Keihin Corp

Inventors

• Shimatsu Takayuki
• Mori Masamitsu
• Moriya Masateru
• Sato Gaku
• Uemura Ikuhiro

Classifications

• F02D41/20

  Output circuits, e.g. for controlling currents in command coils · CPC title

• F02D41/40 Primary

  with means for controlling injection timing or duration · CPC title

• Y02T10/44

  Cross-Sectional Technologies · mapped topic

• F02M51/0685

  the armature and the valve being allowed to move relatively to each other or not being attached to each other · CPC title

• F02D35/023

  by determining the cylinder pressure · CPC title