Starter protector for controlling starter current limiter and automobile starting control system of starter protector

Abstract

The invention discloses a starter protector for controlling a starter current limiter. The starter protector comprises a high-side switch, a first sampling circuit, a second sampling circuit, a third sampling circuit and a controller, wherein the high-side switch is used for being connected to a connection path from external control voltage to the control terminal of the starter current limiter in series, and the external control voltage is used for controlling the starter current limiter to carry out the current limiting work; the first sampling circuit, the second sampling circuit and the third sampling circuit are used for collecting the input end voltage, the output end voltage and the external control voltage of the starter current limiter correspondingly; and the input end of the controller is connected with the output ends of the first to third sampling circuits, and the output end of the controller is connected with the control end of the high-side switch so that the high-side switch can be controlled to be switched on or off. The invention further discloses an automobile starting control system. The starter protector can recognize the fault situations of the starter current limiter and a starter in the starting process and disconnect the external control voltage from the starter current limiter automatically in case of faults so that the starter can be protected.

Description

technical field [0001] The invention relates to the technology of automobile starting control. Background technique [0002] At present, more and more automobile starting control systems use the starter current limiter. figure 1 A schematic diagram of the principle of an existing automobile starting control system using a starter current limiter is shown. As shown in the figure, the existing automobile starting control system includes a battery U1 , an ignition switch starting control circuit 2 , a starter current limiter 3 , a starter energizing switch circuit 4 and a starter 5 . The input end of the ignition switch start control circuit 2 is connected with the output end of the battery U1, and the output end of the ignition switch start control circuit 2 is respectively connected with the control end of the starter current limiter 3 and the control end of the starter energization switch circuit 4. The input end of the starter current limiter 3 is connected to the output ...

AI Technical Summary

Problems solved by technology

Once the starter motor is blocked or overloaded, or the starter current limiter fails, but the starter continues to work, it will not only cause damage to the starter, but also bring safety hazards

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