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:
Sep. 28, 1982
Filed:
Jul. 20, 1981
Applicant:
Inventors:
Hiroo Utsumi, Kariya, JP;
Yukio Sakakibara, Anjo, JP;
Teruyoshi Ito, Kariya, JP;
Toshiharu Iwata, Aichi, JP;
Takashi Yamada, Nishio, JP;
Assignee:
Nippondenso Co., Ltd., Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B / ; F02P / ;
U.S. Cl.
CPC ...
123425 ; 123435 ;
Abstract
An ignition timing control system for an internal combustion engine includes a knocking reference level generator having an operational amplifier. The operational amplifier receives at its inverting terminal a filtered knock signal and produces a half-wave signal through a diode. The half-wave output signal of the diode is fed back to the inverting terminal of the operational amplifier through a feedback parallel circuit of a resistor and a capacitor.