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:
May. 07, 1991
Filed:
Aug. 15, 1989
Shoji Tokuda, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
An engine control system for an internal combustion system changes an initially set control value either to a specified control value suitable for a grade of gasoline having a low octane rating when an engine operating condition is in a first operating zone for knocking detection ranging over a specific engine load and under a specific engine speed or to another specified value suitable for another grade of gasoline having a high octane rating when an engine operating condition is in a second operating zone for knocking detection ranging over the specific engine speed. Grades of gasoline delivered to the internal combustion engine are discriminated based on the frequency of knockings continually detected by a knock sensor. Gasoline delivered to the internal combustion engine is regarded as having a high octane rating when the frequency of knockings is at low level or as having a low octane rating when when the frequency of knockings is at a high level.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile