EP 0146426 B1 19880511 - METHOD OF CONTROLLING A LAMBDA PROBE REGULATED FUEL INJECTION AND CONTROLLED IGNITION ENGINE
Title (en)
METHOD OF CONTROLLING A LAMBDA PROBE REGULATED FUEL INJECTION AND CONTROLLED IGNITION ENGINE
Publication
Application
Priority
FR 8317538 A 19831104
Abstract (en)
[origin: EP0146426A1] 1. A process for controlling a fuel injection engine fitted with an electronic injection and ignition computer coupled to a probe for detecting the oxygen content of the exhaust gases, comprising the following steps : a) determining at least the operating speed and the load of the engine as engine operating parameters, b) determining in dependence on said parameters a nominal injection time Tin corresponding to lean fuel metering of the fuel mixture, c) periodically causing temporary enrichment of said mixture by a predetermined increase in the nominal injection time Tin , said increase being equal to Tin . x in which x is a coefficient of less than 1, which predetermined enrichment is to restore the lean fuel mixture to a stoichiometric mixture, d) determining if the signal supplied by the probe for detecting the oxygen content of the exhaust gases and corresponding to the enriched mixture indicates a stoichiometric mixture or a richer mixture than stoichiometric or a leaner mixture than stoichiometric, e) in dependence on said determining step modifying the nominal injection time Tin so as to bring the enriched mixture closer to a stoichiometric mixture, and f) continuing the control mode corresponding to a lean fuel metering in the fuel mixture on the basis of the modified nominal injection time Tin , characterised by the following steps : g) determining in dependence on the engine operating parameters a nominal ignition advance angle AVn corresponding to the nominal injection time Tin , and h) causing, with a predetermined delay with respect to the beginning of periodic enrichment of step c) above, a temporary reduction in the nominal ignition advance angle AVn equal to k . x . AVn in which x is the coefficient of less than 1 used for computing the enrichment Tin . x and k is a constant of predetermined value.
IPC 1-7
IPC 8 full level
F02D 35/02 (2006.01); F02D 37/02 (2006.01); F02D 41/10 (2006.01); F02D 41/14 (2006.01); F02D 41/22 (2006.01)
CPC (source: EP)
F02D 37/02 (2013.01); F02D 41/10 (2013.01); F02D 41/22 (2013.01); F02D 41/2458 (2013.01)
Citation (examination)
US 4200064 A 19800429 - ENGELE HORST [IT]
Designated contracting state (EPC)
DE GB IT SE
DOCDB simple family (publication)
FR 2554509 A1 19850510; FR 2554509 B1 19880318; DE 3471131 D1 19880616; EP 0146426 A1 19850626; EP 0146426 B1 19880511
DOCDB simple family (application)
FR 8317538 A 19831104; DE 3471131 T 19841030; EP 84402175 A 19841030