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. 30, 2004
Filed:
Feb. 11, 2000
Robert Donald Lorenz, Madison, WI (US);
Roy Inge Davis, Saline, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
An engine crankshaft torque observer ( ) and method of operation. An engine combustion process ( ) is modeled ( ) to develop modeled pressure estimates of combustion chamber pressures in engine cylinders according to certain engine inputs, such as fuel ( ), EGR ( ), and timing ( ), that influence combustion chamber pressures. Kinematics ( ) relating reciprocal motion of pistons in the engine cylinders to an engine crankshaft and engine friction ( ) relating running friction of the engine to engine crankshaft rotation are also modeled ( ). A processor processes the certain engine inputs through the combustion process model to develop modeled pressure estimates which are processed through the kinematics model to develop modeled positive torque contribution due to combustion processes and through the friction model to develop modeled torque loss due to running friction. The modeled positive torque contribution due to combustion processes and the modeled torque loss due to running friction are processed to develop a measurement of indicted torque output of the engine. The combustion process model for developing modeled pressure estimates of combustion chamber pressures in engine cylinders is also novel.