Engine control with higher torque at direct drive transmission r

Details Engine control with higher torque at direct drive transmission r Engine control with higher torque at direct drive transmission r

1997-01-22

1999-03-02

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Engine controlled by transmission

F16H 5506

Patent

active

058763023

ABSTRACT:
An improved method for operating a engine, a transmission, and an associated electronic control module for the engine includes setting maximum torque levels for the engine by the electronic control module. The electronic control module determines the speed ratio of the transmission and sets a first relatively high torque load when it is determined that the transmission is in direct drive. If the electronic control module determines that the transmission is in non-direct drive then it sets a lower maximum torque load. The present invention has recognized that when in direct drive, the transmission may transmit higher torque loads than it would be able to do when it is in a gear reduction mode. In this way, the present invention increases the maximum torque rating for the transmission at its highest speed ratio.

REFERENCES:
patent: 5048372 (1991-09-01), Sodeno et al.
patent: 5409432 (1995-04-01), Steeby
patent: 5679096 (1997-10-01), Stine et al.
"Machine Design", Deutschman, et al., Macmillan Pub., pp 126-128, 1975.
Caterpillar Brochure "3406B PEEC Torque Ratings" .COPYRGT.1989 Caterpillar.
Caterpillar Brochure "3406C Multi-Torque" (no date).

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