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Knock sensor-triggered timing light with visible laser retro-reflecting control

  • US 5,610,327 A
  • Filed: 06/07/1995
  • Issued: 03/11/1997
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Fees
First Claim
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1. In a timing light, which includes a flash circuit for producing a flash of illumination in response to an ignition event of interest in of an internal combustion engine, the improvement comprising:

  • a trigger circuit coupled to the flash circuit for enabling the flash circuit only in the presence of an enable signal, and a sensing circuit adapted to be coupled to the engine for sensing a predetermined position of the engine other than its position at the ignition event of interest to indicate that the ignition event of interest is about to occur and responsive to such sensing for generating the enable signal.

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