Electronic Parallel Lift And Return To Carry Or Float On A Backhoe Loader

摘要

A backhoe loader 10 with a controller 100 that uses angular signals from at least one sensor to calculate a loader tool angle with respect to the vehicle frame 12 or with respect to the earth and to maintain the loader tool angle via controller generated commands to a tool actuator 61 as a function of the angular signals and commands to a boom actuator 50. The controller 100 enables proportional control of the tool angle via a command input device such as an electronic joystick 21. If the electronic joystick 21 is moved to an appropriate detent position, the controller executes a return to carry function. If the boom 31 is at or below the return to carry angle at the time the joystick 21 is moved to the detent position, the controller 100 executes a float function allowing the bucket 36 and the boom 31 to rest on the ground and follow the contours of the earth as the vehicle moves over the earth.