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:
Jul. 21, 1987
Filed:
Apr. 23, 1986
Kenneth J Henry, Southfield, MI (US);
Allan J Kotwicki, Sterling Heights, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An on-line system for emulating the operation of a motor vehicle drivetrain including a torque converter, a converter clutch and a shiftable ratio automatic transmission. Nonlinear differential equations describing the ability of the drivetrain input torque to accelerate the engine inertia and the ability of the drivetrain output torque to overcome the road load and accelerate the vehicle inertia are coupled by a drivetrain model, and periodically integrated forward in real time to provide desired (predicted) engine and vehicle speed values. The predicted engine speed forms the basis for a speed control signal which is applied to an engine dynamometer to load an engine under test as though it were actually installed in a motor vehicle including the modeled drivetrain elements.