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. 22, 1976
Filed:
Jun. 21, 1974
Torazo Nishimiya, Mito, JA;
Hitachi, Ltd., , JA;
Abstract
A control system for controlling the ignition of fuel in an internal combustion engine with differential ignition timing comprising a first and a second ignition plug disposed in each combustion chamber of the engine, and a first and a second ignition system associated with the first and second ignition plugs respectively. A pulse delay circuit is provided in the second ignition system and the time constant thereof is varied depending on the operating condition of the engine for varying the rate of delay of the ignition timing of the second ignition plug in the second ignition system relative to the ignition timing of the first ignition plug in the first ignition system. This delay time is reduced in an operating range requiring a high engine output so that the demand for purificaton of exhaust gases and the demand for desired operating performance of the engine which are contradictory to each other can be satisfied.