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:
Dec. 02, 1980
Filed:
Feb. 28, 1979
Tadashi Hattori, Okazaki, JP;
Kenji Goto, Susono, JP;
Daisaku Sawada, Susono, JP;
Takashi Shigematu, Susono, JP;
Hiroaki Yamaguchi, Anjo, JP;
Minoru Nishida, Okazaki, JP;
Teruyoshi Ito, Kariya, JP;
Nippondenso Co., Ltd., Kariya, JP;
Nippon Soken, Inc., Nishio, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Abstract
An ignition timing control apparatus for an internal combustion engine detects the rotational angle and intake vacuum of the engine to control the ignition timing of the engine in accordance with the computation of computing means on the detected signals, and on the other hand the vibration of the engine is detected to detect the occurrence of knock and thereby to correct the ignition timing in response to the detection of knock. The control apparatus includes a vibration detector for detecting the vibration of the engine, and a knock control circuit for detecting the occurrence of knock when the ratio between the average value of the outputs of the vibration detector during a predetermined angle or a predetermined time interval before the maximum engine cylinder pressure value and that of the vibration detector during a predetermined angle or a predetermined time interval after the maximum engine cylinder pressure value, and the ignition timing of the engine is retarded in response to the occurrence of knock.