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:
Apr. 23, 1985
Filed:
Sep. 29, 1982
Hiroshi Haraguchi, Oobu, JP;
Ko Narita, Aichi, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
In an ignition timing control system, a knocking detector detects a knocking of the internal combustion engine. The ignition timing control circuit includes a cylinder switching signal generator circuit for generating a cylinder switching signal in synchronism with the rotation of the engine, a plurality of integrators each corresponding to each or a plurality of cylinders for producing a reference signal in response to the noise signal produced from the knocking detector, a plurality of analog switches for changing one of the integrators into ON-state in response to the cylinder switch signal, and a comparator having an input terminal supplied with the detection signal of the knocking detector and the other input terminal supplied with an integration output signal of the integrators, said comparator producing a knocking signal which retards the ignition timing of the engine when the detection signal is larger in amplitude than the integration signal.