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:
Oct. 17, 2017
Filed:
Oct. 09, 2012
Yanmar Co., Ltd., Osaka, JP;
YANMAR CO., LTD., Osaka-Shi, JP;
Abstract
A gas enginewhich operates in stoichiometric mode under high-load conditions and which operates in lean burn mode under medium- and low-load conditions includes a valvewhich supplies the gas enginewith an air-fuel mixture composed of air and fuel gas. In the valvea valve unitfor stoichiometric operation is connected in series to a valve unitfor lean burn operation and is also connected to a mixerAn opening area of the valveis controlled in such a manner as to ensure a predetermined opening area for effecting stoichiometric operation, to uniformly decrease the opening area over time until a switching operation from stoichiometric operation to lean burn operation ends, to ensure a predetermined opening area for effecting lean burn operation, and to uniformly increase the opening area over time until a switching operation from lean burn operation to stoichiometric operation ends.