EP 0637685 B1 19970108 - Process and apparatus for auto-adaptation of air/fuel ratio in an internal combustion engine with canister purge system
Title (en)
Process and apparatus for auto-adaptation of air/fuel ratio in an internal combustion engine with canister purge system
Title (de)
Verfahren und Einrichtung zum Selbstanpassen des Luft/Kraftstoffverhältnisses in einer Innenbrennkraftmaschine mit Tankentlüftungssystem
Title (fr)
Procédé et dispositif d'auto adaptation de richesse pour moteur à combustion interne avec système de purge de canister
Publication
Application
Priority
FR 9308883 A 19930720
Abstract (en)
[origin: EP0637685A1] According to the invention, in a fuel-injected engine for which the basic period of injection is defined as a function of a shift and of a gain of a straight line expressing this period as a function of the pressure in the pipe, for a given speed and load condition, auto-adaptation is prevented by modifying the gain or the shift simultaneously when the purge valve of the canister is delivering, and auto-adaptation is allowed respectively in shift or in gain during at most a maximum number of n1 or n2 cycles, in an operating range 1 at low pressure, or respectively 2 at high pressure, the purge valve is allowed to deliver only after the maximum number of n1 or respectively n2 cycles has been accomplished, and a further auto-adaptation in gain and likewise in shift is permitted only after all the permitted cycles in gain and in shift have been accomplished. Application to fuel-injected engines with a canister purge circuit and auto-adaptation of the mixture richness on the basis of a lambda probe in the exhaust gases. <IMAGE>
IPC 1-7
IPC 8 full level
F02D 41/00 (2006.01); F02D 41/14 (2006.01); F02D 41/24 (2006.01); F02M 25/08 (2006.01)
CPC (source: EP)
F02D 41/0032 (2013.01); F02D 41/0042 (2013.01); F02D 41/2412 (2013.01); F02D 41/2448 (2013.01); F02D 41/2454 (2013.01); F02M 25/08 (2013.01)
Designated contracting state (EPC)
DE ES GB IT SE
DOCDB simple family (publication)
EP 0637685 A1 19950208; EP 0637685 B1 19970108; DE 69401400 D1 19970220; DE 69401400 T2 19970507; ES 2095727 T3 19970216; FR 2708047 A1 19950127; FR 2708047 B1 19950922
DOCDB simple family (application)
EP 94401643 A 19940718; DE 69401400 T 19940718; ES 94401643 T 19940718; FR 9308883 A 19930720