Measuring and testing – Vehicle chassis – Steering
Patent
1994-04-26
1996-04-09
Chilcot, Richard
Measuring and testing
Vehicle chassis
Steering
123419, G01M 1500
Patent
active
055050875
ABSTRACT:
A method for detecting combustion misfires in internal combustion engines includes calculating a non-concentricity value from fluctuations in angular speed of a crankshaft, and dropping the non-concentricity value below a negative non-concentricity limit value if a combustion misfire is present. If the non-concentricity value drops below the non-concentricity limit value, a value for a stretch of bad road is calculated from successively calculated non-concentricity values, and the value for a stretch of bad road is dropped below or made of equal magnitude to a positive limit value for a stretch of bad road, if a stretch of bad road is present. The previously indicated combustion misfire is not confirmed if the value for a stretch of bad road drops below or is of equal magnitude to the limit value for a stretch of bad road. However, the previously indicated combustion misfire is confirmed if the value for a stretch of bad road exceeds the limit value for a stretch of bad road.
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Angermaier Anton
Wier Manfred
Chilcot Richard
Greenberg Laurence A.
Lerner Herbert L.
McCall Eric S.
Siemens Aktiengesellschaft
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