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:
May. 30, 2017
Filed:
Feb. 18, 2014
Isuzu Motors Limited, Tokyo, JP;
ISUZU MOTORS LIMITED, Tokyo, JP;
Abstract
An exhaust gas purification device includes a diesel particulate filter (DPF) that collects particulate matter (PM) from an exhaust gas, a urea water spray unit that sprays urea water into the exhaust gas, a selective catalytic reduction (SCR) device that reduces and purifies NOof the exhaust gas, a capacitance detecting unit that detects capacitance of the DPF, a PM accumulation calculating unit that calculates an amount of accumulated PM on the basis of the capacitance, an NOconsumption estimating unit that calculates an amount of consumed NOon the basis of the amount of accumulated PM, and a control unit that controls an engine such that a ratio of NO to NOflowing into the SCR approaches 1:1 on the basis of the estimated consumption.