Predictive correction in internal combustion engines

Patent metadata

Field	Value
Publication number	US-9951741-B2
Application number	US-201414774754-A
Country	US
Kind code	B2
Filing date	Mar 11, 2014
Priority date	Mar 11, 2013
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

A method and system for reducing cycle to cycle variation of an engine is provided. The system may determine fuel injection characteristics and predict a gas burning rate or flame speed based on the fuel injection characteristics. The system may adjust an ignition timing in response to the predicted gas burning rate within the same engine cycle.

First claim

The invention claimed is:

1. A method for reducing cycle to cycle variation of an engine, the method comprising:
determining fuel injection characteristics;
predicting a gas burning rate or flame speed based on the fuel injection characteristics; and
adjusting an ignition timing in response to the predicted gas burning rate within a same engine cycle, wherein the gas burning rate or flame speed is determined by predicting flame arrival at one or multiple locations inside a combustion chamber through a first ion current signal timing and a second ion current signal timing.

2. The method according to claim 1 , wherein the fuel injection characteristics are determined by at least a hall effect signal, current probe signal, needle lift sensor signal, or fuel rate delivery sensor signal.

3. The method according to claim 1 , wherein the fuel injection characteristics include at least one or a combination of an amplitude, length, slope, timing, peak, and/or profile.

4. The method according to claim 1 , wherein the gas burning rate is determined by comparing a timing of at least one of a start, end, peak, or centroid of the first ion current signal to a timing for at least one of a start, end, peak, or centroid of the second ion current signal.

5. A method for reducing cycle to cycle variation of an engine, the method comprising:
determining fuel injection characteristics;
predicting a gas burning rate or flame speed based on the fuel injection characteristics; and
adjusting an ignition timing in response to the predicted gas burning rate within a same engine cycle, wherein the gas burning rate or flame speed is determined by predicting flame arrival at one or multiple locations inside a combustion chamber through a first optical sensor timing signal and a second optical sensor signal timing.

6. The method according to claim 5 , wherein the fuel injection characteristics are determined by at least a hall effect signal, current probe signal, needle lift sensor signal, or fuel rate delivery sensor signal.

7. The method according to claim 5 , wherein the fuel injection characteristics include at least one or a combination of an amplitude, length, slope, timing, peak, and/or profile.

8. The method according to claim 5 , wherein the gas burning rate is determined by comparing a timing of at least one of a start, end, peak, or centroid of the first ion current signal to a timing for at least one of a start, end, peak, or centroid of the second ion current signal.

Assignees

• Univ Wayne State

Inventors

• Estefanous Fadi Adly Anis
• Mekhael Shenouda
• Henein Naeim A

Classifications

• F02P5/152 Primary

  dependent on pinking (detecting or indicating knocks in internal-combustion engines G01L23/22) · CPC title

• F02D35/02

  on interior conditions · CPC title

• F02D2041/1412

  using a predictive controller · CPC title

• F02D35/021

  using an ionic current sensor · CPC title

• F02D35/027

  using knock sensors · CPC title