Garrett Motion. has filed a patent for methods and systems utilizing model-based calculations to control mass flow in internal combustion engines. The system includes a secondary air injection valve to facilitate exothermic reactions with exhaust gases. The method involves calculating pressures, temperatures, and mass flow through the valve for optimal engine operation. GlobalData’s report on Garrett Motion 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 Garrett Motion, Photovoltaic drones was a key innovation area identified from patents. Garrett Motion's grant share as of January 2024 was 77%. Grant share is based on the ratio of number of grants to total number of patents.

Secondary air injection system for internal combustion engine

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

A patent application (Publication Number: US20240026809A1) discloses a method for operating an engine system that includes a combustion engine, a compressor, and an environmental catalyst device (ECD) to reduce pollutants in exhaust air. The method involves calculating pressure, temperature, and mass flow through a secondary air injection (SAI) valve based on various inputs such as intake manifold pressure and temperature. The SAI valve is adjusted based on the calculated mass flow, with additional steps for cold start conditions, ECD temperature thresholds, and compressor activation to raise pressure when needed.

Furthermore, the patent application extends to a vehicle equipped with the described engine system components and a controller to perform the method of operation. The controller calculates pressure, temperature, and mass flow through the SAI valve, adjusting the SAI valve position accordingly. Additional features include electric motor activation to raise pressure, determining pressure differentials, and managing particulate filter refreshing. The vehicle's turbocharger system, including a turbine and compressor, is also detailed, with the controller performing iterative calculations to solve mass flow equations. Overall, the patent application outlines a comprehensive method for optimizing engine system performance and reducing emissions through precise control of air flow and pressure at various stages of operation.

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