| 摘要 |
In engine abnormality detection, the engine output is measured, and values of a specific operating variable of the fuel system, the lubrication system, the cooling system, the intake system, or the exhaust system of the engine, are measured and the specific values are converted to corrected data values at the equivalent rated power point, which are compared to corresponding threshold values in order to detect an abnormality in the respective system. The apparatus includes detection sensors (33-38) for detecting values of specific operating variables; an engine rotational speed sensor (31); a fuel injection volume sensor (32); storing means (45a), for storing in memory the values of the engine rotational speed and the volume of injected fuel at the rated power point; specific data selection means (45b, 45d), for storing in memory the rotational speed value and the fuel injection volume value for a point in time within a first period of time, for measuring the value of the specific operating variable at that point in time, and for selecting the largest value from among the measured values of the specific operating variable; specific data conversion means (45c, 45e), for converting the largest value to a corrected value at the equivalent rated power point of the engine, and for storing the results in memory; and alarm output means (46), for issuing an alarm if the corrected value is larger than a corresponding threshold value.
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