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Test apparatus for testing internal combustion engine electronic spark ignition systems

  • US 4,331,921 A
  • Filed: 05/21/1980
  • Issued: 05/25/1982
  • Est. Priority Date: 05/25/1979
  • Status: Expired due to Term
First Claim
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1. A test apparatus for testing internal combustion engine electronic spark ignition systems of the kind referred to, comprising first means for detecting the instant of interruption of primary current, second means for detecting the commencement of current flow through the primary winding and third means receiving inputs from both said first means and said second means and producing an output pulse indicating a satisfactory operation of the system if said second means does not detect commencement of current flow within a predetermined time after said first means detects interruption of primary current.

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