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:
Aug. 02, 2005
Filed:
Apr. 01, 2003
Xiaoqiu LI, Columbus, IN (US);
Todd C. Slater, Columbus, IN (US);
Mark R. Stepper, Columbus, IN (US);
Anthony J. Abbenante, New Smyrna Beach, FL (US);
Stephanie L. Goerges, Franklin, IN (US);
Yue Yun Wang, Columbus, IN (US);
Xiaoqiu Li, Columbus, IN (US);
Todd C. Slater, Columbus, IN (US);
Mark R. Stepper, Columbus, IN (US);
Anthony J. Abbenante, New Smyrna Beach, FL (US);
Stephanie L. Goerges, Franklin, IN (US);
Yue Yun Wang, Columbus, IN (US);
Cummins, Inc., Columbus, IN (US);
Abstract
A system for diagnosing operation of a cooling system for an internal combustion engine includes a coolant temperature sensor producing a temperature signal corresponding to coolant fluid temperature, means for determining either an engine load or a throttle percentage, and a control computer configured to diagnose operation of the cooling system as a function of the temperature signal, either the engine load or throttle percentage, and a fuel delivery command for controllably supplying fuel to the engine. After expiration of a diagnostic period, the control computer diagnoses the cooling system as normally operating if the diagnostic period ended by the temperature signal meeting or exceeding a predefined temperature and if a total energy used by the engine during the diagnostic period is less than an estimated energy, and diagnoses the cooling system as failing if the total energy used during the diagnostic period otherwise meets or exceeds the estimated energy.