EP 0811758 B1 20031105 - Method of controlling an air-fuel ratio of an engine
Title (en)
Method of controlling an air-fuel ratio of an engine
Title (de)
Verfahren zur Steuerung des Luft-Kraftstoffverhältnisses in einer Brennkraftmaschine
Title (fr)
Méthode de commande de rapport air/carburant dans un moteur à combustion interne
Publication
Application
Priority
- JP 14176396 A 19960604
- JP 14188296 A 19960604
Abstract (en)
[origin: EP0811758A2] In an engine, the elapsed time for rotation through 30 degrees crank angle near top dead center of the compression stroke and the elapsed time for rotation through 30 degrees crank angle near 90 degrees after top dead center of the compression stroke are found and the amount of torque fluctuation is found from these elapsed times. Whether the vehicle is driving on a rough road is judged from the amount of fluctuation of the angular velocity of the crankshaft. When it is judged that the vehicle is driving on a rough road, the correction of the air-fuel ratio based on the amount of torque fluctuation is prohibited. <IMAGE>
IPC 1-7
IPC 8 full level
F02D 41/14 (2006.01)
CPC (source: EP)
F02D 41/1498 (2013.01); F02D 2200/1015 (2013.01); F02D 2200/702 (2013.01)
Citation (examination)
US 4691286 A 19870901 - OBAYASHI HIDEKI [JP], et al
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0811758 A2 19971210; EP 0811758 A3 19990901; EP 0811758 B1 20031105; DE 69725929 D1 20031211; DE 69725929 T2 20040729
DOCDB simple family (application)
EP 97108963 A 19970604; DE 69725929 T 19970604