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:
Feb. 03, 2004
Filed:
Mar. 21, 2002
Carlton Bale, Columbus, IN (US);
Yue Yun Wang, Columbus, IN (US);
Cummins, Inc., Columbus, IN (US);
Abstract
A system for diagnosing an air handling mechanism of an internal combustion engine includes an air handling mechanism actuator, an air handling mechanism position sensor, a sensor associated with an engine operating condition separate from the air handling mechanism yet responsive to changes in the position of the mechanism actuator, and a control computer. The control computer is responsive to the position sensor signal and the engine operating condition sensor to diagnose faults/failure conditions associated with any of the air handling mechanism, the mechanism position sensor and the mechanism actuator. The air handling mechanism may be any of an EGR valve, a variable geometry turbocharger, a wastegate valve and an exhaust throttle, and the engine operating condition sensor may be associate with any of air intake pressure, air intake temperature, mass flow rate of intake air, exhaust gas pressure, EGR mass flow rate or turbocharger speed.