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. 24, 2002
Filed:
Dec. 18, 2000
Bayerische Motoren Werke Aktiengesellshaft, Munich, DE;
Abstract
In a method and apparatus for controlling a driving engine/transmission unit having a continuously variable automatic transmission, the transmission output torque acting upon the driving wheels of a vehicle and the engine reaction torque retroacting upon the driving engine can be adjusted by way of a regulated transmission variable. For operating the control as both a torque and transmission ratio regulator, it is suggested to predefine a desired transmission output torque, and to determine the regulated transmission variable, the transmission output power, a transmission power loss, the power requirement of the driving engine (from the transmission output power and the transmission power loss), a desired engine torque and a desired rotational engine speed, a corrected desired engine torque and/or a corrected desired transmission output torque in conjunction with a change of the regulated transmission variable (torque regulator operation) and/or a desired transmission ratio and a desired engine torque with a change of the regulated transmission variable, in such a manner that a determined actual transmission ratio coincides with a calculated desired transmission ratio (transmission ratio regulator operation).