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. 01, 2024
Filed:
Dec. 31, 2019
Weichai Power Co., Ltd., Shandong, CN;
Jinjin Hu, Shandong, CN;
Xianfeng Ren, Shandong, CN;
Yupeng Wang, Shandong, CN;
Libing Yan, Shandong, CN;
Dong Qiu, Shandong, CN;
WEICHAI POWER CO., LTD., Shandong, CN;
Abstract
A method for detecting a urea consumption deviation including: calculating a pump pressure correction factor fac; calculating a urea consumption deviation factor A when the pump pressure correction factor fac is within a calibrated range; calculating the urea consumption deviation factor A multiple times, and calculating an average value of A; and comparing the average value of the urea consumption deviation factor A with a calibrated limiting value range, so as to determine whether there is a great deviation between an actual urea consumption value and a theoretical urea consumption value, the calculating the pump pressure correction factor fac comprises: adjusting a pressure of a urea pump to P; adjusting the pressure of the urea pump to P, where Pis smaller than P; recording a time Tduring which the pressure of the urea pump is adjusted from Pto P; and calculating fac=T/(P−P).