![]() ![]() Means for generating an electrical sync signal in timed relation to the generation of an output signal by said comparator means, whereby the sync signals are repetitively generated in timed relation to the occurrence of ignition events in said specified cylinder.Ģ. ![]() Means for sensing the ignition voltage magnitudes generated for each of said cylinders, such magnitudes at the point of electrical discharge being determined as a function of the density of the gaseous mixtures therein, the compression cylinder voltage magnitude thereby being relatively large as compared to the expansion cylinder voltage magnitude Ĭomparator means effective a predetermined time after the interruption of current in said primary winding for comparing the sensed ignition voltage magnitudes of said two cylinders and for generating an output signal if the sensed voltage magnitude of the specified cylinder is larger than that of the other of said cylinders, whereby such output signals are repetitively generated in coincidence with the generation of a compression cylinder ignition voltage for said specified cylinder and For an internal combustion engine including at least two cylinders in which gaseous mixtures alternately undergo compression and expansion before and after the ignition thereof, and an ignition system of the type including primary and secondary transformer windings, the secondary winding of which is connected at one end thereof to a sparking device in one of said cylinders and at the other end thereof to a sparking device in the other of said cylinders such that interruption of current in the primary winding generates ignition voltages of opposite polarity at the ends of said secondary winding for triggering substantially concurrent electrical discharges at said sparking devices for producing an ignition event in the compression cylinder, a system for generating electrical sync signals in relation to the occurrence of such ignition event in a specified one of said cylinders, comprising:
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