Method and apparatus for an optimized fuel control on the basis of an outlet - oxygen signal for the reduction of motor vehicles

摘要

Control system (8) for optimising the fuel control in an internal combustion engine (14), comprising:a with the motor (14) is connected to the exhaust pipe (20), in which an exhaust gas catalytic converter (22) is arranged;a in the direction of flow of the exhaust gas catalytic converter (22) arranged in the exhaust system (20) of an oxygen sensor (48), the oxygen signal; anda control unit (30) which, with the oxygen sensor (48) communicate and a the motor (14) supplied air / fuel - mixture on the basis of the oxygen signal from the oxygen sensor (48) modified,characterized in thatThreshold values (60, 70) are provided, which, when exceeded by the oxygen signal the control unit (30) of a regulation of the air / fuel - mixture supplied with a closed control loop in a control of the air / fuel mixture supplied - which merges with an open loop mode.