EP 0852667 B1 20000322 - METHOD FOR DETERMINING AN OPTIMAL AIR-FUEL MIXTURE RATIO IN AN INTERNAL COMBUSTION ENGINE, AND DEVICE THEREFOR
Title (en)
METHOD FOR DETERMINING AN OPTIMAL AIR-FUEL MIXTURE RATIO IN AN INTERNAL COMBUSTION ENGINE, AND DEVICE THEREFOR
Title (de)
VERFAHREN ZUR BESTIMMUNG DES EINEM VERBRENNUNGSMOTOR ZUGEFÜHRTEN OPTIMALEN LUFT-KRAFTSTOFF-VERHÄLTNISSES UND ENTSPRECHENDE VORRICHTUNG
Title (fr)
PROCEDE DE DETERMINATION DE LA RICHESSE OPTIMALE D'UN MELANGE AIR/CARBURANT ALIMENTANT UN MOTEUR A COMBUSTION INTERNE ET DISPOSITIF CORRESPONDANT
Publication
Application
Priority
- EP 9603516 W 19960808
- FR 9511427 A 19950927
Abstract (en)
[origin: WO9712135A1] A method for determining an optimal air-fuel mixture ratio in an internal combustion engine is disclosed. The engine comprises a speed controller for maintaining a constant engine speed. The method comprises feeding an initial air-fuel mixture to the engine and controlling the engine speed by adjusting the throttle valve position. Said method further comprises the steps of causing a plurality of ratio jumps in the mixture fed to the engine; measuring changes in the valve position for each ratio jump; determining whether the changes in the valve position are lower than a threshold value, in which case the mixture has the optimal mixture ratio, or higher than the threshold value, in which case the mixture ratio must be changed; and, if required, correcting the mixture ratio of the initial mixture fed to the engine depending on the magnitude of the measured changes in the valve position. Said method is particularly useful in engines for lawn mowers, power generators, etc.
IPC 1-7
IPC 8 full level
F02D 31/00 (2006.01); F02D 41/14 (2006.01)
CPC (source: EP US)
F02D 31/005 (2013.01 - EP US); F02D 41/1406 (2013.01 - EP US); F02D 41/1408 (2013.01 - EP US); F02D 41/2458 (2013.01 - EP US); F02D 2011/102 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES GB IT
DOCDB simple family (publication)
WO 9712135 A1 19970403; DE 69607362 D1 20000427; DE 69607362 T2 20011031; EP 0852667 A1 19980715; EP 0852667 B1 20000322; ES 2146410 T3 20000801; FR 2739141 A1 19970328; FR 2739141 B1 19971205; US 5992381 A 19991130
DOCDB simple family (application)
EP 9603516 W 19960808; DE 69607362 T 19960808; EP 96928434 A 19960808; ES 96928434 T 19960808; FR 9511427 A 19950927; US 4956598 A 19980327