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:
Jun. 10, 2008
Filed:
May. 09, 2007
Shusuke Akazaki, Saitama-ken, JP;
Takahide Mizuno, Saitama-ken, JP;
Masayoshi Nishino, Saitama-ken, JP;
Mitsuo Hashizume, Saitama-ken, JP;
Shusuke Akazaki, Saitama-ken, JP;
Takahide Mizuno, Saitama-ken, JP;
Masayoshi Nishino, Saitama-ken, JP;
Mitsuo Hashizume, Saitama-ken, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An air-fuel ratio control system for an internal combustion engine, which is capable of accurately estimating an exhaust gas state parameter according to the properties of fuel, thereby making it possible to properly control the air-fuel ratio of a mixture. The air-fuel ratio control systemestimates an exhaust gas state parameter indicative of a state of exhaust gases, as an estimated exhaust gas state parameter (AFNN) by inputting a detected combustion state parameter (DCADLYIG) indicative of a combustion state of the mixture in the engine, and detected operating state parameters (NE, TW, PBA, IGLOG, TOUT) indicative of operating states of the engine, to a neural network (NN) configured as a network to which are input the combustion state parameter (DCADLYIG) and the operating state parameters (NE, TW, PBA, IGLOG, TOUT), and in which the exhaust gas state parameter is used as a teacher signal (step), and controls the air-fuel ratio based on the estimated exhaust gas state parameter (AF_NN) (steps, andto).