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. 16, 2010
Filed:
Sep. 11, 2008
Yasuhiko Ishida, Kobe, JP;
Hitoshi Sako, Kobe, JP;
Yasuhiko Ishida, Kobe, JP;
Hitoshi Sako, Kobe, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
There is provided an idling rotation speed control apparatus that can reduce the development man-hours and the cost and that enables operation during a trolling cruise to be readily performed. The idling rotation speed control apparatus includes an engine rotation speed detection means, an engine temperature detection means, an engine idling driving state detection means, an engine load detection means, an intake air amount adjusting means for adjusting an amount of intake air during an idling state, and an ECU for controlling the intake air amount adjusting means during idling driving. The ECU includes a basic torque ratio calculation function for calculating a ratio of torque to be generated, to engine maximal torque, that is necessary for making the engine steadily operate at a target rotation speed during idling driving; a target torque ratio calculation function for correcting the basic torque ratio, in accordance with a difference between a target rotation speed and an engine rotation speed, and calculating a target torque ratio; a target air amount calculation function for calculating an air amount necessary for generating the target torque ratio; and an intake air amount adjusting function for controlling the intake air amount adjusting means, based on the calculated air amount.