CATERPILLAR INCORPORATED Patent applications |
Patent application number | Title | Published |
20130261870 | System And Method For Controlling Autonomous Machine Within Lane Boundaries During Position Uncertainty - An autonomous machine control system includes a positioning unit measuring position and orientation, and a navigation unit storing a route plan including an intended travel path along a lane. The lane has a width defined by a left-hand boundary and a right-hand boundary. The navigation unit receives an uncertainty value associated with the position or orientation, and creates a virtual two-dimensional footprint based on an actual machine footprint and the uncertainty value. The navigation unit also simulates movement of the virtual footprint along the intended travel path, calculates a left-hand margin value defined by the virtual footprint and the left-hand boundary, and calculates a right-hand margin value defined by the virtual footprint and the right-hand boundary. The margin values are compared to a predetermined value, and speed or travel direction of the machine is controlled if either of the margin values is below the predetermined value. | 10-03-2013 |
20130190996 | System And Method For Controlling Engine Torque Load - A machine includes a plurality of torque consuming devices drivingly coupled with an internal combustion engine. The plurality of torque consuming devices includes a continuously variable transmission coupling the internal combustion engine with a plurality of ground engaging elements. An electronic controller is in communication with the internal combustion engine and the plurality of torque consuming devices and is configured to execute a torque load control algorithm for generating a torque load limit based, at least in part, on an engine underspeed value. The electronic controller identifies a potential engine stall event during which a current engine speed of the internal combustion engine drops below the engine underspeed value by a predetermined amount, and executes a transient torque load control algorithm to adjust the torque load limit responsive to the identification of the potential engine stall event. | 07-25-2013 |