Caterpillar Inc.

Timothy M Gutzwiller

Timothy Feucht

Alan Lewis Ferguson

Conrad G Grembowicz

Michael F Coffman

Benjamin D Drake

A method of controlling an operation of a mechanism is provided. A first rate limit is assigned to a first input device that is operable to generate a first signal to control the operation of the mechanism. A second rate limit is assigned to a second input device that is operable to generate a second signal to control the operation of the mechanism. At least one of the first and second input devices are manipulated to effect a desired change in the operation of the mechanism. A maximum allowable rate of change in the operation of the mechanism is identified based on the first and second signals and the first and second rate limits. A rate of change in the operation of the mechanism to achieve the desired change in the operation of the mechanism is determined based on a comparison of the maximum allowable rate of change in the operation of the mechanism with a last used rate of change in the operation of the mechanism.

Rate limiting control system

In many applications, it is desirable to have work machines automatically maintain a desired speed and heading. Provided is an electronic control connected with left and right hydraulic motor assemblies that drive left and right ground engaging propulsion mechanisms, left and right speed sensors, and on operator input.

Automatic tracking control for work machines

A controllable mechanical brake release system for controllably releasing a mechanical brake included in a hydrostatic machine is disclosed. In the preferred embodiment the hydrostatic machine is located on an incline. The mechanical brake is included in a mechanical braking system. The hydrostatic machine has the braking system, a hydrostatic propulsion system and a controller. A determined hydraulic pressure associated with the hydrostatic propulsion system is compared with an established trip indicator. A release mechanical brake signal is produced in response to the comparison.

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Dunlap, IL, United States of America

Timothy M Gutzwiller