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:
Apr. 08, 2003
Filed:
Jan. 31, 2001
Chuan He, Columbus, IN (US);
Paul R. Miller, Columbus, IN (US);
Cummins Engine Company, Inc., Columbus, IN (US);
Abstract
The present invention relates to an engine diagnostic system for detecting malfunctions in an engine system having a variable geometry turbine exhaust system. The engine diagnosis system includes an electronic control module adapted to periodically initiate a preprogrammed variable geometry turbine diagnostic routine. The diagnostic routine includes the operations of sending a sinusoidal control signal to a pressure regulator, determining the configuration of the variable geometry turbine, determining the pressure of a capsule, calculating the configuration of the variable geometry turbine as a function of the sinusoidal control signal, calculating the pressure of the capsule as a function of the sinusoidal control signal, determining if a pressure sensor is in calibration, determining if the pressure regulator is malfunctioning, determining if the variable geometry turbine position sensor is in calibration, determining if the variable geometry turbine is malfunctioning, and displaying the results of the test.