Title:
DEVICE AND METHOD FOR CONTROLLING INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2014/122946
Kind Code:
A1
Abstract:
The value ∆ALPHA is calculated by subtracting 1 from the average of air-fuel ratio correction coefficients α in an air-fuel ratio feedback control system (step 1), and when ∆ALPHA is equal to or greater than a predetermined value ∆α1, the cross-sectional area of an orifice passage of a fuel injection valve is assessed to have been reduced by deposits (step 2). In a first stage of minimal deposit adhesion, in which the value ∆ALPHA is less than a second predetermined value ∆α2, the nozzle temperature is reduced and fuel pressure is increased by a decrease in compression ratio and a delay of ignition time, so that the deposits are removed (step 5). In a second stage of prevalent deposits, in which the value ∆ALPHA is equal to or greater than the second predetermined value ∆α2, the compression ratio is increased to increase the nozzle temperature, and deposits are incinerated. Reduction in orifice passage cross-sectional area due to deposit adhesion is avoided.
Inventors:
MANO TADAKI (JP)
Application Number:
PCT/JP2014/050284
Publication Date:
August 14, 2014
Filing Date:
January 10, 2014
Export Citation:
Assignee:
NISSAN MOTOR (JP)
International Classes:
F02D15/02; F02D23/02; F02D41/04; F02M61/16; F02P5/15
Foreign References:
| JP2009036127A | 2009-02-19 | |||
| JP2007083951A | 2007-04-05 | |||
| JP2007002795A | 2007-01-11 | |||
| JP2012047159A | 2012-03-08 | |||
| JP2012202322A | 2012-10-22 | |||
| JP2008248785A | 2008-10-16 | |||
| JP2010169014A | 2010-08-05 | |||
| JP2004218433A | 2004-08-05 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
Hiromichi Kobayashi (JP)
Hiromichi Kobayashi (JP)
Download PDF: