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:
Jun. 28, 2005
Filed:
Jan. 29, 2004
John D Black, Ashbourne, GB;
John D Black, Ashbourne, GB;
Rolls-Royce, PLC, London, GB;
Abstract
A method for determining the total mass flow through an engine () comprises measuring () the fuel flow to the engine () and measuring the concentration of carbon dioxide in the gases exhausted () from the engine (). The concentration of carbon dioxide is measured by detecting the infrared radiation absorption spectrum of carbon dioxide using a laser () and a detector (). The method comprises determining () the air to fuel ratio in the engine () from the fuel flow and the concentration of carbon dioxide. The method comprises determining () the air mass flow through the engine () from the air to fuel ratio and calculating () the total air and fuel mass flow through the engine () by adding the air mass flow through the engine () to the fuel mass flow to the engine ().