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:
Oct. 04, 1983
Filed:
Apr. 08, 1981
Kimihiro Boyama, Sunto, JP;
Kokusan Denki Co., Ltd., Numazu, JP;
Abstract
This invention pertains to an ignition signal generating device for use in a contactless ignition system for an internal combustion engine and more particularly to an ignition signal generating device to control an ignition position in accordance with a revolution of the internal combustion engine. The ignition signal generating device comprises a first signal generating circuit to generate a first signal at a first position corresponding to the maximum advanced position of the internal combustion engine and a second signal generating circuit to generate a second signal at a second position corresponding to the minimum advanced position of the internal combustion engine. A first triangular wave generating circuit is provided which generates a first triangular wave having a given inclination rising during the period from the first signal generating position to the second signal generating position. A first monostable multi-vibrator is triggered by the second signal to generate a square wave signal of a given duration .tau..sub.1. A second triangular wave generating circuit is provided which generates a second triangular wave having a given inclination rising during the period from a falling position of an output from the monostable multi-vibrator at least to the first signal generating position. The maximum value of the triangular wave is maintained until the second signal is generated. An ignition signal generating circuit is provided which produces an ignition signal to determine an ignition position of the internal combustion engine when the signal levels of first and second triangular wave are equal to each other.