| 摘要 |
A method and device for in-use detecting low cranking strength of a combustion engine battery during engine starting, based on integrating changes in battery voltage specifically during engine starting, from the time the electro-mechanical starting load is initially applied to the battery, and logically analyzing values of the integrated changes in battery voltage during engine starting, for determining whether or not there is an initial stage of developing low cranking strength of the battery. The invention features (a) sensing time varying voltage of the battery by a comparator, from initiation of, and during, engine starting, (b) comparing the time varying voltage of the battery to a constant reference DC voltage by the comparator, (c) integrating output signals of the comparator by an integrator, (d) determining and responding to the output signal of the integrator by a detector, and (e) determining and responding to the output signal of the detector by an alarm, for providing an in-use warning signal of the low cranking strength of the battery to an operator of the combustion engine, during or following engine starting, and, optionally, following engine turn-off. Optional inclusion of a counter reset sub-circuit enables resetting a counter which counts the number of occurrences the device detects changes in battery voltage corresponding to low cranking strength of the battery during engine starting. |
