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:
Sep. 23, 2014
Filed:
Sep. 13, 2012
Ryo Sakaguchi, Chiyoda-ku, JP;
Yasuhiko Ishida, Chiyoda-ku, JP;
Ryo Sakaguchi, Chiyoda-ku, JP;
Yasuhiko Ishida, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
Provided is an rpm control device for a general-purpose engine, which is capable of realizing droop control in a spark-ignition engine only by the adaptation of isochronous control. When the droop control is selected, a rotation decrease rate (K) (value equal to or smaller than 1) is obtained from an engine rpm and a load. The result of multiplication of a basic target rpm (Nb) requested by a driver by the rotation decrease rate (K) is obtained as a target rpm (No). By setting the rotation decrease rate to a smaller value as the load becomes higher, the target rpm (No) is set smaller than the basic target rpm (Nb). The isochronous control is performed by using an electronic throttle so as to achieve the obtained target rpm (No) to realize the droop control in a pseudo-manner.