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:
Nov. 23, 1999
Filed:
Aug. 11, 1997
Steven V Christensen, Peoria, IL (US);
Dale A Dalton, Metamora, IL (US);
Joshua Zulu, Chillicothe, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
An apparatus for controlling the torque on a power train of a machine is disclosed. The power train includes an engine, a transmission, and a torque converter for transmitting torque between the engine and transmission. A torque converter speed sensor produces a torque converter speed signal and an engine speed sensor produces an engine speed signal. A gear selector device produces a gear select signal indicating a desired gear ratio. A look-up table stores an upper engine power curve and a lower engine power curve. Finally, an electronic controller receives the torque converter, engine speed and gear select signals, and selects one of the upper and lower engine power curves to operate the engine in response to the selected gear ratio and torque converter speed.