×

Distributorless ignition system interface for engine diagnostic testers

  • US 4,644,284 A
  • Filed: 12/26/1984
  • Issued: 02/17/1987
  • Est. Priority Date: 12/26/1984
  • Status: Expired due to Fees
First Claim
Patent Images

1. For use with a test engine analyzer to analyze a computer controlled automotive engine having an electronic control module which develops timing signals to a coil ignition module which fires the spark plugs of the engine, the timing signals carrying dwell information, an interface, comprising:

  • input means for receiving timing signals from the electronic control module;

    output means for transmitting timing signals to the coil ignition module;

    cylinder clock modification circuitry for receiving said timing signals from said input means and for passing timing signals to said output means, said cylinder clock modification circuitry generating a modified timing signal in response to an inhibit command signal for transmission to said coil ignition module, said modified timing signal carrying dwell information of a dwell period insufficient to fire a spark plug; and

    power balance command circuitry for receiving a cylinder inhibit command from said engine analyzer and responsively generating a said inhibit command signal, whereby a cylinder of the engine is inhibited from firing.

View all claims
  • 7 Assignments
Timeline View
Assignment View
    ×
    ×