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. 15, 1987
Filed:
Jul. 31, 1986
Yuji Nakajima, Yokosuka, JP;
Akito Yamamoto, Yokohama, JP;
Nissan Motor Company, Limited, Yokohama, JP;
Abstract
In an internal combustion engine, a spark timing control device adjusts spark timing in accordance with detected value of vibration in combustion pressure. A sensor detects vibration in combustion pressure within the engine. The detected combustion pressure vibration is converted into a correlation value relating to combustion condition of the engine. The current correlation value is compared to a reference value corresponding to the correlation value which was obtained during idling operation of the engine. This comparison is to determine whether or not a malfunction of the spark timing control device occurs. The spark timing is controlled in accordance with the detected combustion pressure vibration and also with the determination as to whether or not a malfunction of the spark timing control device occurs.