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:
Nov. 16, 2021
Filed:
Jan. 16, 2019
Kobelco Construction Machinery Co., Ltd., Hiroshima, JP;
Mitsunori Hirozawa, Hiroshima, JP;
Masayuki Kagoshima, Hiroshima, JP;
KOBELCO CONSTRUCTION MACHINERY CO., LTD., Hiroshima, JP;
Abstract
A work machine is capable of detecting an abnormality in the amount of soot in exhaust gas in an exhaust pipe upstream of an exhaust gas aftertreatment device. The work machine includes: an exhaust gas sensor which detects the amount of soot contained in exhaust gas between an engine and an exhaust gas aftertreatment device and generates a soot amount detection signal; and a controller into which the detection signal is input. The controller includes an abnormality judgment section that makes an abnormality judgment on whether or not the detected soot amount is abnormal, and a threshold setting section that sets a soot amount threshold that is a threshold for making the abnormality judgment. The abnormality judgment section judges an abnormality when the value of the soot amount corresponding to the soot amount detection signal is larger than the soot amount threshold.