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:
Mar. 07, 1989
Filed:
Feb. 19, 1988
Richard A Marsh, Birmingham, MI (US);
Gary J Brand, Irvine, CA (US);
David C Poirier, Troy, MI (US);
Dale L Phillips, Dearborn, MI (US);
Sami M Hamade, Ann Arbor, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An engine spark timing control system and method for addressing various engine output torque constraints. Preignition and knock concerns are addressed according to the conventional practice of calibrating spark control table, and the most limiting of the drivetrain-related torque constraints is referenced to such table to determine the additional retard, if any, required to satisfy such constraint. With this control, the preignition spark control table or any of the drivetrain-related torque constraints may be changed at will without violating the other constraints or calibrations.