Eaton Corporation

David Edward Gibbons

Anthony Stasik

Robert Stanley Wheeler

Jeffrey Philip Hawarden

Ian M Newbigging

John Slater Tuson

A method/system for controlling downshifting in an automated mechanical transmission system (,) utilized on a vehicle having a manually controlled engine brake (,) and foot brake (,) system. The engine speed at which downshifts are commanded (ES,) is modified as a function of sensed operation of the engine brake (EB&quest;) and foot brake (FB) systems.

Automated transmission downshift control

An automatic range shift control system for automatically controlling range section (14) shifting in an otherwise manually shifted range type compound transmission (10) is provided. A sensor (100) senses a value indicative of vehicle ground speed and provides a signal (100A) which is compared to a reference value. If the signal is greater than the reference, an actuator (96) is urged to engage the high speed range ratio and if the signal is less than the reference, the actuator is urged to engage the low speed range ratio.

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Lancs, United Kingdom

David Edward Gibbons