Continental Automotive Gmbh

Sirko Schlegel

Jens Paggel

Gerhard Eser

Sushman Dinka-Honnappa

A controller for an internal combustion engine may comprise a first assignment unit, an observer, a calibration unit, and a second assignment unit. The first assignment unit may determine cylinder-specific measurement signals as a function of the measurement signal from a lambda probe. The observer may include a sensor model of the lambda probe arranged in a feedback branch of the observer. The calibration unit may impress a predefined interference pattern made of cylinder-specific mixture differences and adapt, in reaction to the respectively predefined interference pattern as a function of the observer output variables related to the respective cylinders, an assignment rule between the measurement signal of the lambda probe and a lambda signal. The second assignment unit may carry out, by means of the assignment rule, an assignment between the measurement signal and the lambda signal.

System and method for operation of an internal combustion engine

A binary lambda sensor has a first electrode arranged on the exhaust gas side, a second electrode arranged contiguous to a reference air volume, and a power source arranged between the first and second electrode. A potential difference between the first and second electrodes forms a measurement signal of the sensor. In a measurement operation of the sensor, the power source is operated in a measurement operating state and provides the measurement signal. To adjust a specified oxygen concentration in the reference air volume, the power source is operated in a regeneration operating state. If a specified condition is fulfilled and the engine is operating in a coasting mode, the power source is operated in the measurement operating state, and a power source adjustment signal is determined for the regeneration operating state based on the measurement signal, for the adjustment of the specified oxygen concentration in the reference air volume.

Method and device for the operation of a binary lambda sensor arranged in an exhaust gas tract of an internal combustion engine

A signal from a linear lambda probe, which signal is meant to represent an air/fuel ratio for the gas flowing in the exhaust section, specifically prior to combustion of said gas, is determined based on a pump current. A difference signal is formed based on a difference between a pump voltage signal and a Nernst voltage signal. An offset error in the measured signal is determined based on the difference signal for an approximately stoichiometrically prescribed raw setpoint value for the air/fuel ratio, with a setpoint value for the air/fuel ratio being determined based on the raw setpoint value and a forced excitation signal.

Method and apparatus for operating a linear lambda probe

A method diagnoses an electrical contact connection of an exhaust gas sensor, in which two current sources are used to impress currents into a pump cell and a reference cell of the exhaust gas sensor. If a line is faulty, the relevant current cannot flow and a voltage on the relevant current source assumes a high value. If a second line is faulty, measurement of the voltage on the second connection, which is connected to the connecting point between the two cells, provides a low value when the relevant second connection is isolated from the reference-ground potential by a second switch, since the cell capacitances have not been able to charge to the reference-ground potential.

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Neutraubling, Germany

Sirko Schlegel