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:
Mar. 24, 1987
Filed:
Aug. 28, 1985
Hideki Yukawa, Susono, JP;
Hiroyuki Horibe, Numazu, JP;
Kokusan Denki Co., Ltd., Numazu, JP;
Abstract
An ignition system for an internal combustion engine is disclosed which is adapted to carry out the comparison between an integrating voltage of a first integrating circuit and that of a second integrating circuit by means of a comparator to obtain advance characteristics. An ignition operation allowable interval detection signal generating circuit of the ignition system comprises a charge control transistor turned on when a first pulse signal is generated, a signal accumulating capacitor charged to a given voltage through the transistor, and a discharge control transistor for momentarily discharging the capacitor when a second pulse signal is generated. Such construction of the detection signal generating circuit allows the structure of the ignition system to be significantly simplified. Also, the connection of a speed-up capacitor between a base of the first integrating circuit and an emitter thereof permits the first capacitor to be charged to a substantially constant initial voltage without being affected by an ambient temperature. Further, a reset circuit may be provided with a malfunction preventing capacitor to prevent the shortening of duration of spark.