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:
Oct. 09, 2012
Filed:
Oct. 29, 2010
Qing Wang, Canton, MI (US);
Fazal Urrahman Syed, Canton, MI (US);
Brandon R. Masterson, Dexter, MI (US);
Xiaoyong Wang, Canton, MI (US);
Ming Lang Kuang, Canton, MI (US);
Ryan Abraham Mcgee, Ann Arbor, MI (US);
Qing Wang, Canton, MI (US);
Fazal Urrahman Syed, Canton, MI (US);
Brandon R. Masterson, Dexter, MI (US);
Xiaoyong Wang, Canton, MI (US);
Ming Lang Kuang, Canton, MI (US);
Ryan Abraham McGee, Ann Arbor, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A method and system for limiting a fast transient in an engine in a hybrid vehicle is provided. The predicted fuel loss percentage is calculated from an inferred air-fuel ratio (inferred lambda). The rate limit term is calculated from a measured air-fuel ratio (measured lambda) and an engine torque command change rate. The predicted fuel loss percentage and the rate limit term are inputs into a calibration table to determine an engine power rate limit and an engine torque rate limit. An engine torque command is limited using the engine torque rate limit to control a fast engine torque transient for an engine. An engine power command is limited using the engine power rate limit to control the fast engine power transient for the engine.