| 摘要 |
A method and an apparatus for preventing overrun of an engine starter with high reliability by detecting accurately a state in which an engine operation has been started on the basis of a starter supply voltage to thereby protect the engine starter from excessive load and burnout while sparing extra interconnection or wiring for the starter. The apparatus includes a voltage detecting means (1) for measuring a supply voltage of the engine starter, a precedent starter voltage behavior storage means (11, 11A, 11B) for storing a precedent starter voltage behavior, a current starter voltage behavior storage means (12) for storing a current starter voltage behavior, an arithmetic means (13, 13A, 13B) for reading out the current starter voltage behavior and the precedent starter voltage behavior to thereby arithmetically determine a voltage difference (DELTAV) on the basis of difference between the current starter voltage behavior and the precedent starter voltage behavior, a comparison means (14, 14A, 14B) for comparing the voltage difference (DELTAV) with a predetermined voltage value (Vr), and a starter turn-off means (15, 15A) for electrically deenergizing the engine starter upon detection on the basis of result of the comparison that a state in which the voltage difference (DELTAV) remains short of the predetermined voltage value (Vr) has continued for or longer than a predetermined time duration.
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