The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 1981
Filed:
Jul. 12, 1978
David T Cavil, Menomonee Falls, WI (US);
William R Krueger, West Allis, WI (US);
Outboard Marine Corporation, Waukegan, IL (US);
Abstract
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 oscillator 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.