Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
April 26, 2011
Patent Application Number
11770940
Date Filed
June 29, 2007
Patent Citations Received
Patent Primary Examiner
Patent abstract
A system and process for controlling propulsion and steering of a track trencher excavation machine powered by an engine includes a multiple mode propulsion and steering control system that performs a plurality of functions depending on a selection of one of a plurality of operational modes. A controller generates a vehicle propulsion hydrostatic drive signal optionally using a track drive hydraulic pressure or a track drive speed as a variable for modifying the propulsion drive signal. The controller optionally uses a hydraulic attachment drive pressure as a variable for further modifying the propulsion drive signal.
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