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:
Dec. 02, 2025
Filed:
Oct. 18, 2024
Yanmar Holdings Co., Ltd., Osaka, JP;
Daichi Matsunaga, Osaka, JP;
Kazuteru Toshinaga, Osaka, JP;
Yusuke Honda, Osaka, JP;
Kenji Hiraoka, Osaka, JP;
YANMAR HOLDINGS CO., LTD., Osaka, JP;
Abstract
This engine device runs on a fuel containing a toxic substance. The engine device includes: an exhaust passage that causes an exhaust substance that is discharged from an engine, such as an exhaust gas or a blow-by gas, to flow through; a plurality of treatment devices having different functions that are disposed in the exhaust passage as devices that perform a treatment of the exhaust substance; and a path switching valve that is disposed in the exhaust passage, and switches, from among the plurality of treatment devices, to the treatment device that performs the treatment of the exhaust substance. The toxic substance contained in the fuel is ammonia or methanol. The engine device includes an external drive pump that causes a blow-by gas to flow through a blow-by path, and also includes, as the plurality of treatment devices, an exhaust purification catalyst device, an abatement device, and an intake return device.