Method for detecting irregular combustion processes in a multicylinder diesel internal combustion engine
First Claim
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1. A method for detecting irregular combustion processes in a multicylinder diesel internal combustion engine, which comprises:
- individually recording combustion noises for each cylinder within predeterminable measurement windows through the use of at least one structure-borne noise sensor supplying structure-borne noise signals;
comparing the individual structure-borne noise signals for a each cylinder with individual threshold values assigned to the cylinders;
if the threshold values are exceeded, checking if the structure-borne noise signals exceed the threshold values within or outside the measurement windows; and
inferring incorrect injections of injectors of an injection device when the threshold values outside the measurement windows are exceeded.
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Abstract
A method for detecting irregular combustion processes in a multicylinder diesel internal combustion engine includes detecting incorrect injections and non-injections by recording combustion noise in individual cylinders through the use of one or more structure-borne noise sensors. Subsequently, a check is performed as to whether or not sensor signals exceed threshold values individual to each cylinder within or outside fixed measurement windows.
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11 Claims
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1. A method for detecting irregular combustion processes in a multicylinder diesel internal combustion engine, which comprises:
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individually recording combustion noises for each cylinder within predeterminable measurement windows through the use of at least one structure-borne noise sensor supplying structure-borne noise signals; comparing the individual structure-borne noise signals for a each cylinder with individual threshold values assigned to the cylinders; if the threshold values are exceeded, checking if the structure-borne noise signals exceed the threshold values within or outside the measurement windows; and inferring incorrect injections of injectors of an injection device when the threshold values outside the measurement windows are exceeded. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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