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:
Aug. 17, 1993
Filed:
Nov. 25, 1992
Applicant:
Inventors:
Assignee:
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02P / ;
U.S. Cl.
CPC ...
123425 ;
Abstract
An ignition timing control system for an internal combustion engine includes an ECU which calculates a knocking correction value in response to an output from a knocking sensor, and an advance limit value in response to engine operating conditions. The ECU operates to limit correction of the ignition timing of the engine in an advancing direction, beyond the advance limit value when the knocking correction value exceeds the advance limit value. The ECU cancels the advance correction limitation when at least one of conditions of high coolant temperature, high intake air temperature, low coolant temperature, and low rotational speed is satisfied.