MUMBAI, India, Oct. 5 -- Intellectual Property India has published a patent application (202521031158 A) filed by Tata Motors Limited on March 29, 2025, for System And Method To Detect Quality Of Urea Concentration In A Diesel Exhaust Fluid Tank.

Inventors include Abhijit Athawale; Ravindra Ravva; Balaji M; and Santosh Karle.

The application for the patent was published on October 02, 2026, under issue no. 40/2026.

Abstract: SYSTEM AND METHOD TO DETECT QUALITY OF UREA CONCENTRATION IN A DIESEL EXHAUST FLUID TANK The present disclosure provides a system and method to detect quality of urea concentration in a diesel exhaust fluid tank. The method comprises receiving, from one or more sensors, a first set of real time values comprising at least one of an average nitrogen oxide (NOx) conversion efficiency value and corresponding standard deviation value. The method further comprises comparing to determine a first set of deviation values between the first set of real time values against a second set of predetermined values comprising at least one of an average NOx conversion efficiency value and corresponding standard deviation value. The method further comprises determining whether the first set of deviation values exceeds a first set of predetermined threshold values or not and generating an alarm to refill the optimal urea concentration in the DEF tank upon determining when the first set of deviation values exceeds the first set of predetermined threshold values.

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