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:
Jun. 23, 1987
Filed:
Apr. 08, 1986
Nippon Soken, Inc., Nishio, JP;
Abstract
The apparatus includes an ignition instruction signal generating unit for repeatedly generating a first ignition instruction signal instructing an AC discharging duration and a second ignition instruction signal instructing the current flow time of a first primary coil at each ignition timing; and an ignition control circuit unit for causing the first and second switching elements to perform a push-pull operation for a predetermined period of time upon reception of a given ignition instruction signal. When it is detected from a current detection signal from the current detection element upon reception of the first ignition instruction signal that the current of one of the first and second closed circuits has reached a predetermined value, a signal for turning OFF the one of the first and second closed circuits is supplied to one of the first and second switching elements and a signal for turning ON the other closed circuit is supplied to the other switching element so as to enable the push-pull operation of the switching elements. Accordingly, one of the switching elements is turned ON in response to the second ignition instruction signal for the current flow time of the primary thereby, and is then turned OFF. Thus, an ignition timing can be determined precisely, and a sufficiently high voltage can be obtained.