公开(公告)号：EP1979597A1

公开(公告)日：2008-10-15

申请号：EP06841986.0

申请日：2006-10-27

申请人： Renault S.A.S.

发明人： AFONSO, Vasco ,  BAZOGE, Serge ,  SILVEIRA, Alexandre ,  VALLET, Jean-Claude ,  WALRAVE, Aymeric

IPC分类号： F02D41/00

CPC分类号： F02D19/088 ,  F02D19/061 ,  F02D19/084 ,  F02D41/0025 ,  F02D41/065 ,  F02D41/1454 ,  F02D2041/1432 ,  F02D2200/0612 ,  Y02T10/36

摘要： The invention relates to a method for controlling an internal combustion engine (1) which is to be operated either by petrol or alcohol or by a variable proportion of the two fuels, and comprises an electronic control unit (5) that can drive the engine (1), an admission line (3), and an exhaust line (4) provided with a richness probe (8). The inventive method is characterised in that it comprises at least one step wherein the richness of the carbide mixture entering into the combustion cylinders is determined, and a step (34) wherein the duration of the injection is increased by intervals according to the richness of the carbide mixture.

公开(公告)号：EP0946868B1

公开(公告)日：2004-02-11

申请号：EP97951321.5

申请日：1997-12-12

申请人： Renault s.a.s.

发明人： AFONSO, Vasco ,  AIMARD, Frédéric ,  SOUSSAN, Sabrina

IPC分类号： G01N27/407

CPC分类号： F02D41/1476 ,  F02D41/1495

摘要： The invention concerns a method for electric diagnosis of an oxygen sensor of an internal combustion engine functioning on several richness values and in particular on a lean burn, characterised in that it consists in the following steps: monitoring the functioning of the engine and when predetermined functioning conditions are observed in which the richness of the carburetted mixture remains different from the stoichiometry for a sufficient time interval, measuring the voltage level of the signal emitted by said oxygen sensor; comparing this voltage value to a polarisation value and deducing therefrom if said voltage value is substantially equal to the polarisation voltage the existence of a fault in the electric connection of the sensor, or otherwise the absence of fault in the sensor electric connection.