Roberto Uchoa Paula

US Patent:

7921705, Apr 12, 2011

Filed:

Oct 2, 2008

Appl. No.:

12/244031

Inventors:

Wajdi B. Hamama - Whitmore Lake MI, US
Jon C. Miller - Fenton MI, US
Igor Anilovich - Walled Lake MI, US
John W. Siekkinen - Novi MI, US
Steven J. Shepherd - Commerce MI, US
Robert S. Wickman - Westland MI, US
Roberto De Paula - New Hudson MI, US

International Classification:

G01K 13/00

US Classification:

7311468, 374145

Abstract:

An engine coolant temperature estimation system comprises a coolant temperature estimation module and a coolant monitoring module. The coolant estimation module estimates an engine coolant temperature based on at least one of a mass air flow, a vehicle speed, and an ambient temperature. The coolant monitoring module selectively operates an engine based on the estimated engine coolant temperature.

US Patent:

8050841, Nov 1, 2011

Filed:

Oct 21, 2008

Appl. No.:

12/254926

Inventors:

Mark H. Costin - Bloomfield Township MI, US
Timothy J. Hartrey - Brighton MI, US
Layne K. Wiggins - Plymouth MI, US
Bryan D. Lehman - Fenton MI, US
Roberto De Paula - New Hudson MI, US
Joseph M. Stempnik - Warren MI, US

International Classification:

G06F 7/00

US Classification:

701 84, 701103, 701115, 123399, 123 9017, 123 9015, 123 9031

Abstract:

An air-per-cylinder (APC) security system for a vehicle comprises an APC determination module, an APC threshold determination module, and an APC diagnostic module. The APC determination module determines first and second APC values for first and second cylinders of an engine, respectively, based on mass airflow (MAF) into the engine. The APC threshold determination module determines an APC threshold based on the first APC value and a spark timing for the first cylinder. The APC diagnostic module selectively diagnoses a fault in the APC determination module when the second APC value is greater than a sum of the first APC value and the APC threshold.