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:
Dec. 13, 2005
Filed:
Mar. 18, 2003
Michael J. Deronne, Beverly Hills, MI (US);
Joshua J. Barhitte, Flint, MI (US);
William Western, Howell, MI (US);
Michael J. DeRonne, Beverly Hills, MI (US);
Joshua J. Barhitte, Flint, MI (US);
William Western, Howell, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
Methods and apparatus are provided for predicting ambient air temperature (PAT) around a vehicle (and partly controlling vehicle operation) based on Mass Air Flow (MAF), Vehicle Speed (VSS), Inlet Air Temperature (IAT), Engine Run Time (ERT) and the last PAT value (LPAT). If MAF,VSS are below thresholds CCand ERT is below threshold Cthen PAT is set equal to the smaller of IAT or LPAT. If MAF,VSS,ERT exceed CCCas for example, in steady run operation, then after an interval PAT approaches IAT−C+/−Cwhere Cand Care stored parameters. An idle counter increments when MAF<CVSS<Cis TRUE and decrements by parameter Cwhen FALSE and must reach zero before the PAT steady run value is set. This improves prediction accuracy during transition from idle to steady state running. The PAT estimation process is repeated about every 10 seconds.