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:
Jan. 31, 2006
Filed:
Sep. 22, 2004
Timothy J. Gundrum, Wheaton, IL (US);
Timothy J. Gundrum, Wheaton, IL (US);
International Engine Intellectual Property Company, LLC, Warrenville, IL (US);
Abstract
An internal combustion engine has cylinders within which combustion occurs and an exhaust system through which products of combustion are exhausted from the cylinders. A temperature sensor and an electric heater are disposed in temperature sensing relation to the exhaust gas flow. A processor develops temperature data obtained from the temperature sensor, and power data representing power required to heat the electric heater to a temperature in excess of temperature of exhaust gas flow past the heater. The processor processes the temperature data, the power data, and data representing mass flow through the engine upstream of the temperature sensor and heater according to an algorithm for yielding data representing difference between mass flow of exhaust gas past the temperature sensor and heater and mass flow upstream of the temperature sensor and heater. The measurement may then be used to measure leakage from the exhaust system by subtracting it from flow measurement in a different location.