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:
Feb. 13, 1996
Filed:
Sep. 06, 1994
Yoshinori Nakajima, Tokyo, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for determining the air density of intake air into an engine without using an additional hard ware like an atmospheric pressure sensor, An average basic fuel injection amount and an average throttle opening angle are obtained when the engine is in a first predetermined condition and when it is in a second predetermined condition, respectively. Based on these average basic fuel injection amonut data and average throttle opening angle data, a determination parameter is calculated, The determination parameter thus calculated is employed for a parameter from which an air density value is obtained or for a parameter from which it is judged whether the engine is operated in high altitude or not.