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:
Apr. 11, 1989
Filed:
Feb. 16, 1988
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An addition correction term is added to a feedback control term when an internal combustion engine is idling, a control valve is under feedback control, and an automatic transmission is in drive range (D range). The addition correction term is calculated by multiplying a predetermined constant value by at least one of several correction coefficients which are based on RPM and temperatures of the engine and vehicle speed. A learnt value is calculated based on intake manifold pressure when the internal combustion engine is in idling condition, the control valve is under feedback control, and the automatic transmission is in disengagement condition, for example, neutral range (N range). When the automatic transmission is turned into D range the existing manifold pressure is detected and the addition correction term is calculated based on the difference between the learnt value and the detected manifold pressure.