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Engine starter protective and control module and system

  • US 4,490,620 A
  • Filed: 09/12/1983
  • Issued: 12/25/1984
  • Est. Priority Date: 09/12/1983
  • Status: Expired due to Fees
First Claim
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1. A protective system supplied from a battery for controlling an engine starter motor comprising:

  • a control system for said starter motor;

    a start switch for connecting supply power from said battery to said control system and for controlling said starter motor to cause cranking rotation of the engine;

    and said control system comprising;

    a crank timer responsive to operation of said start switch for timing a time interval at the end of which cranking of the engine will be stopped;

    starter motor control means responsive to operation of said start switch for energizing the starter motor to start cranking of the engine and for simultaneously starting said crank timer;

    speed detector means responsive to rotation of the engine for providing an engine speed signal;

    run speed sensor means responsive to said speed signal indicating that the engine has attained a predetermined run speed for taking over control of the starter motor from said crank timer so as to control said starter motor control means to stop cranking;

    means responsive to said run speed sensor means to connect supply power from said battery in shunt of said start switch to said run speed sensor means to keep the latter operative and prevent reoperation of said starter motor by opening and reclosing said start switch while the engine is running;

    and electronic means responsive to said crank timer at the end of its time interval if the engine has not reached said predetermined run speed for operating said starter motor control means to deenergize the starter motor.

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