Security for engine torque input air-per-cylinder calculations

US8050841B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

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

Key dates

• Filing date: Oct 21, 2008
• Grant date: Nov 1, 2011
• Expiry date: Jun 19, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

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.