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:
Jul. 27, 2004
Filed:
Oct. 29, 2002
Aisan Kogyo Kabushiki Kaisha, Obu, JP;
Abstract
An electronic throttle control apparatus is provided with an electronic throttle ( ) including a throttle valve ( ) which is opened and closed by a motor ( ), and a microcomputer ( ) which controls the motor ( ). The microcomputer ( ) calculates a deviation between a target opening degree which is set by detection of an accelerator sensor ( ) and an actual opening degree which is detected by a throttle sensor ( ) to calculate a motor control amount in accordance with the deviation and a control gain in correspondence to the deviation. The microcomputer sets a control gain which becomes smaller as the deviation becomes larger, and limits the control gain by the previous control gain at a time when the control gain is larger than the previous control gain. The microcomputer ( ) cancels the limit of the control gain when the calculated actual opening degree change is reduced from a predetermined value.