Digital timing control system for an internal combustion engine

Details Digital timing control system for an internal combustion engine Digital timing control system for an internal combustion engine

F - Mech Eng,Light,Heat,Weapons

02

P

317/5.3

F02P 9/00 (2006.01) F02P 5/15 (2006.01)

Patent

CA 1134900

ABSTRACT OF DISCLOSURE Disclosed herein is a digital timing control system for an internal combustion engine comprising a processing circuit for receiving a cyclical engine timing reference pulse and for producing a cyclical control pulse offset from the reference pulse. The processing circuit includes a counter connected to a NAND gate for producing a control pulse when the counter reaches a preset count, a monostable device, subject to the control pulse, for resetting the counter, an oscil- lator for providing preload pulses to the counter for a predetermined period of time to establish a preload count, and a phase-locked loop, subject to the reference pulse, for transmitting a fixed number of signal pulses per engine revolution to the counter to increment the preload count until said preset count is reached, whereby the control pulse is produced. The system also includes a distributor for receiving the reference pulses and, subject to the control pulses, for converting each of the reference pulses into an output pulse for controlling an engine operating event, such as engine ignition.

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