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:
Mar. 03, 1998
Filed:
Mar. 20, 1997
Shoichi Sakai, Atsugi, JP;
Unisia Jecs Corporation, Kanagawa-ken, JP;
Abstract
With an internal combustion engine wherein a throttle valve is disposed in an intake system, idle operation is carried out immediately after engine manufacture, and intake air flow rate is feedback controlled so that engine rotation speed approaches a target rotation speed. The control value when the target rotation speed is obtained is learned, and the learned result for the obtained control value is stored as an initial idle intake air flow rate adjustment value. As a result, initial fluctuations in idle intake air flow rate due to initial component and engine variations occurring at manufacture can be corrected. Hence, from the start, the idle intake air flow rate can be optimally adjusted so that the idle rotation speed rapidly converges on the target value.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile