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Apparatus and Method for Starter RPM Detection

  • US 20100101312A1
  • Filed: 01/04/2010
  • Published: 04/29/2010
  • Est. Priority Date: 12/20/2002
  • Status: Active Grant
First Claim
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1. An apparatus for performing vehicle engine starter motor testing tasks, comprising:

  • means for applying suitable DC power to vehicle engine starter motors;

    means for applying control signals to starter motors;

    means for sensing the current level drawn by said starter motors;

    means for detecting in the sensed starter motor current level pulsation attributable to addition and removal of individual armature windings from the power circuit as the motor'"'"'s brushes make and break contact with individual segments of the motor'"'"'s commutator;

    means for converting detected pulses into a pulse rate indication; and

    means for displaying as an output the sensed and scaled RPM of the starter motor under test.

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