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. 18, 1991
Filed:
Jul. 27, 1989
Nils A Agren, .ANG.m.ang.l, SE;
SEM AB, Amal, SE;
Abstract
The invention relates to an apparatus for controlling the triggering sequence in capacitive ignition systems for internal combustion engines. The induction achieved by a flywheel magneto usually results in three voltage wave halves, of which two (A,B) have one polarity and an intermediate one (C) has an opposite polarity. In the present case, the first voltage halfwave (A) is used for triggering voltage and the subsequent halfwave with opposite polarity (C) for the charging voltage. The subsequent last voltage halfwave is suppressed (B') to a level below the triggering level. This is achieved by arranging an inhibiting circuit (11-15) for the conventional triggering circuit (8,9,10) by charging (11) a further capacitor (12) during the charging phase itself, the capacitor (12) maintaining control voltage for a further thyristor (15) or triac, which is arranged to short-circuit the triggering voltage.