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. 16, 2013
Filed:
Aug. 05, 2008
Hideo Shiomi, Osaka, JP;
Yasuhiro Ozaki, Osaka, JP;
Takeshi Fujii, Osaka, JP;
Yanmar Co., Ltd., Osaka, JP;
Abstract
In an engine such as an engine for driving a pump or dynamo, in which a load increasing state does not appear as an accelerating state of rotation speed, it is intended to prevent the smoke emission in an abruptly load-increasing state, which might otherwise be caused by the suppression or interruption of an EGR quantity. The enginecomprises a superchargerand an exhaust gas recirculation (EGR) device. The enginemakes an isochronous control or a droop control, when its rotation speed N is shifted from a no-load (idle) or light-load run to a high-load (load-increasing) state. In case it is detected, when the state of the engineshifts to a load state, that the actual rotation speed N becomes lower by a predetermined rotation speed ΔN than a target rotation speed Nm, an EGR valveof the exhaust gas recirculation (EGR) deviceis either throttled to an opening smaller by a predetermined opening ΔF than the ordinary set opening F corresponding to the load state or fully closed.