PACCAR has been granted a patent for a method involving a heavy-duty truck’s diesel engine and exhaust after-treatment system. The system includes selective catalytic reduction systems and NOx sensors for accurate emissions control. The method allows for adjustments based on sensor measurements during normal truck operation. GlobalData’s report on PACCAR gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on PACCAR, Driving behavior monitoring was a key innovation area identified from patents. PACCAR's grant share as of January 2024 was 74%. Grant share is based on the ratio of number of grants to total number of patents.

Method for controlling nox sensors in heavy-duty truck exhaust

Source: United States Patent and Trademark Office (USPTO). Credit: PACCAR Inc

A recently granted patent (Publication Number: US11879367B2) outlines a method for operating a diesel engine in a heavy-duty truck to control NOx emissions through a complex system of selective catalytic reduction. The method involves adjusting the injection rates of Diesel Exhaust Fluid (DEF) based on NOx sensor measurements, with the goal of reducing errors in sensor readings and ensuring efficient emission control. By utilizing multiple sensors and injectors in different parts of the exhaust after-treatment system, the method aims to optimize the reduction of NOx gases while maintaining consistent flow rates and temperatures in the exhaust gas flow.

Furthermore, the patent details the process of eliminating ammonia from the system, adjusting injection timing and exhaust gas recirculation, and conducting intrusive diagnostics during normal truck operation to ensure accurate NOx measurements. The method also includes provisions for controlling tailpipe emissions using specific components of the selective catalytic reduction system, highlighting a comprehensive approach to emission control in heavy-duty vehicles. Overall, the patented method offers a sophisticated and systematic way to manage NOx emissions in diesel engines, showcasing advancements in technology for environmental sustainability in the transportation sector.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.