Beckman Instruments, Inc.

Michael John Morales

George I Reeves

A solid state simulator of an automobile ignition system is disclosed whereby an automotive engine scope tester can be tested and calibrated. Pulse rate logic is made responsive to means for selecting the number of cylinders and the revolutions per minute of the simulated engine. Variable pulse generation means is made responsive to the pulse rate logic. The output of the pulse generation means is used to trigger a driver connected to a conventional coil and single spark plug simulating the firing of all the spark plugs in the engine. Additionally, the output of the pulse generation means is divided and used to drive an adjustable delay which in turn triggers a one shot high voltage pulse to simulate the firing of the spark plug associated with the number one cylinder. Signal output terminals are provided at the input to the coil to indicate the time of each firing signal and allow feedback control by the engine scope tester. Sensing loops are made available for the engine scope tester pickups at the high voltage output of the coil indicating the time of firing of all the spark plugs and at the high voltage pulse circuit simulating the number one spark plug to show the time of firing thereof.

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Whittier, CA, United States of America

Michael John Morales