Patent ID: 7550974
Filing Date: 2009-06-23
Classification: F02P

Abstract:
1. An ignition coil test apparatus, comprising: a pair of terminals for connecting to a positive terminal of an automotive battery and for connecting to ground to supply power to the test apparatus; circuitry for providing a substantially square wave coil-driving signal at a test frequency of approximately 34 Hz; an amplifier connected to the circuitry for providing ground pulses to a negative terminal of the coil under test; a wiring harness connected to the amplifier and adapted for attaching the coil-driving ground pulse signal to a negative terminal of the coil under test and a appropriate positive voltage to a positive terminal of the coil under test so as to over drive the coil at its peak output with a substantially square wave signal varying between approximately 10 volts and approximately 12 volts; and a kilovolt tester requiring 45 kV to produce a spark attached to an output terminal of the coil under test, wherein sparking in the kilovolt tester produces sound representative of coil operation.