Siemens Automotive S.a.

Siemens Vdo Automotive Corporation

Alain Rossignol

Michel Suquet

Method for detecting misfires of a mixture between a fuel oxidizing agent, in any one of the cylinders of an and an internal combustion engine, by the following steps: d) a misfire is diagnosed when the value of E(t) exceeds the threshold (S).

Method for detecting failed combustion in an internal combustion engine by a combination of combustion irregularity indices

A method for detecting combustion failure in an internal combustion engine, by calculating an index ln(t) representing engine irregularities at a moment (t) during certain combustion phases in one cylinder; calculating an observation function G(t), which is a function between index ln(t) and an estimated reference value In+/&#x2212;i(t) at a different moment during engine operation comparing G(t) to a threshold (S), which is a function of engine load (C) and/or rpm (N); and diagnosing a combustion failure when G(t) exceeds (S) or: G(t)=In(t)&#x2212;ln(t), wherein In(t) is a function of ln(t) and In+/&#x2212;i(t) represents the index ln(t) after weighting of the values of said index outside an acceptable predefined differential.

Method for detecting combustion failure by filtering

Method for calculating the torque of an internal combustion engine

Method for sensing faulty combustion in an internal combustion engine

Process and device for detecting combustion irregularities in an engine

Method and device for detecting misfires of the air/fuel mixture feeding

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Toulouse, France

Alain Rossignol