Internal combustion engine control system with injector valve timing control

Patent metadata

Field	Value
Publication number	US-9422884-B2
Application number	US-201214367029-A
Country	US
Kind code	B2
Filing date	Dec 5, 2012
Priority date	Jan 16, 2012
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

The internal combustion engine control system includes an injector to supply fuel to an internal combustion engine, control section for calculating power distribution time for the injector, a sensor to detect a valve opening of the injector, and control section calculating and storing valve opening delay time, which is a difference between a power distribution start time and a valve opening detection time.
When a power distribution time determination section determines that the power distribution time for the injector is not less than a predetermined value, the valve opening delay time is calculated and stored. When the power distribution time for the injector is less than the predetermined value, the power distribution time for the injector is controlled based on the valve opening delay time stored in storing means to perform control to increase the injector power distribution time.

First claim

The invention claimed is:

1. An internal combustion engine control system, comprising: an injector configured to supply fuel to an internal combustion engine; means for calculating power distribution time for the injector; means for detecting a valve opening of the injector; and means for calculating and storing valve opening delay time, the valve opening delay time being a difference between a power distribution start time and a valve opening detection time,
wherein, in a case in which the power distribution time for the injector is not less than a predetermined value, the valve opening delay time is calculated and stored, and in a case in which the power distribution time for the injector is less than the predetermined value, the power distribution time for the injector is controlled based on the valve opening delay time stored in the storing means.

2. The internal combustion engine control system according to claim 1 , further comprising: pressure detection means for detecting a fuel pressure of the injector; means for one of detecting and projecting of a cylinder pressure of the internal combustion engine; and means for calculating and storing a differential pressure between the fuel pressure and the cylinder pressure,
wherein the valve opening delay time is calculated and stored based on the differential pressure.

3. The internal combustion engine control system according to claim 1 , wherein, in the case in which the power distribution time for the injector is less than the predetermined value, the power distribution time for the injector is calculated based on a ratio of a reference fuel injection quantity stored in advance based on the valve opening delay time to a required fuel injection quantity.

4. The internal combustion engine control system according to claim 1 , wherein, in the case in which the power distribution time for the injector is less than the predetermined value, fuel injection from the injector is disabled.

5. The internal combustion engine control system according to claim 1 , wherein, in a case of failure of the valve opening detection means, the storing of the valve opening delay time is disabled.

Assignees

• Hitachi Automotive Systems Ltd

Inventors

• Fujii Yoshihisa
• Fukuda Takao
• Toyohara Masahiro

Classifications

• F02D2200/0602

  Fuel pressure · CPC title

• F02D41/402

  Multiple injections · CPC title

• F02D41/20 Primary

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

• F02D2041/2055

  with means for determining actual opening or closing time · CPC title

• F02D35/023

  by determining the cylinder pressure · CPC title