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:
Mar. 15, 2005
Filed:
Mar. 05, 2002
Giorgio Rizzoni, Upper Arlington, OH (US);
Yann Guezennec, Colombus, OH (US);
Ahmed Soliman, Upper Arlington, OH (US);
Byungho Lee, Columbus, OH (US);
Giorgio Rizzoni, Upper Arlington, OH (US);
Yann Guezennec, Colombus, OH (US);
Ahmed Soliman, Upper Arlington, OH (US);
Byungho Lee, Columbus, OH (US);
The Ohio State University, Columbus, OH (US);
Abstract
Torque estimation techniques in the real-time basis for engine control and diagnostics applications using the measurement of crankshaft speed variation are disclosed. Two different torque estimation approaches are disclosed—'Stochastic Analysis' and 'Frequency Analysis.' An estimation model function consisting of three primary variables representing crankshaft dynamics such as crankshaft position, speed, and acceleration is used for each estimation approach. The torque estimation method are independent of the engine inputs (air, fuel, and spark). Both approaches have been analyzed and compared with respect to estimation accuracy and computational requirements, and feasibility for the real-time engine diagnostics and control applications. Results show that both methods permits estimations of the indicated torque based on the crankshaft speed measurement while providing not only accurate but also relatively fast estimations during the computation processes.