Abstract: A method of controlling a machine during an excavating operation is provided. Stabilizers are deployed to ground contact to stabilize the machine at a first set-up position. Excavating is performed with an excavating assemblage during a first excavating phase while the machine is stabilized at the first set-up position. An automated machine preparation for repositioning mode is initiated for preparing the machine, after the excavating phase, for repositioning to a second set-up position for a second excavating phase, by activating an input device to send input signals to a controller. Output signals are delivered from the controller to control automated machine preparation for repositioning to the second set-up position.

Abstract: A first hydraulic cylinder is associated with the boom having a first end and a second end opposite the first end. A first sensor detects a boom angle of a boom with respect to a support (or a vehicle) near the first end. An attachment is coupled to the second end of the boom. A second hydraulic cylinder is associated with the attachment. A second sensor detects an attachment angle of attachment with respect to the boom. An accelerometer detects an acceleration or deceleration of the boom. A switch is arranged to accept a command to move to a preset position from another position. A controller is capable of controlling the first hydraulic cylinder to attain a boom angle within the target boom angular range and for controlling the second cylinder to attain an attachment angle within the target attachment angular range associated with the preset position in response to the command in conformity with at least one of a desired boom motion curve and a desired attachment motion curve.

Abstract: A first hydraulic cylinder is associated with a boom. A first sensor detects a boom angle of a boom with respect to a support (or a vehicle). An attachment is coupled to one end of the boom. A second hydraulic cylinder is associated with the attachment. A second sensor detects an attachment position of attachment based on a second linear position of a second movable member of the second hydraulic cylinder. An accelerometer detects an acceleration or deceleration of the boom. A switch is arranged to accept a command to move to a preset position from another position. A controller is capable of controlling the first hydraulic cylinder to attain a target boom position and for controlling the second cylinder to attain a target attachment position associated with the preset position in response to the command in conformity with at least one of a desired boom motion curve and a desired attachment motion curve.

Abstract: A method and system for automated operation of a work vehicle comprises a boom having a first end and a second end opposite the first end. A first hydraulic cylinder is associated with the boom. A first sensor detects a boom angle of a boom with respect to a support near the first end. An attachment is coupled to the second end of the boom. A second sensor detects an attachment angle of attachment with respect to the boom. A second cylinder is associated with the attachment. A switch accepts a command to move to or enter a preset position from another position. A controller controls the first hydraulic cylinder to attain a boom angle within a target boom angular range and for controlling the second cylinder to attain an attachment angle within a target attachment angular range associated with the preset position in response to the command.

Abstract: A mechanical assembly controls the position of a trencher attached to a tractor and includes a positioning arm attached to the tractor at one end and the trencher at an opposite end. The positioning arm levers the trencher about a single fulcrum point on the positioning arm. A first lift cylinder has a base end connected to the tractor and an extendible end connected to the first positioning arm at the single fulcrum point. The positioning arm pivots about the tractor to move the trencher in response to the lift cylinder. Grade control cylinders are also attached to the positioning arm and the trencher to control the angular position of the trencher in relation to the ground below.

Abstract: A swivel work machine comprises: a travel device; a swivel base provided on the travel device; a swivel base provided in the front of the travel device; a dozer provided to the travel device; a swing control; a dozer control; a tilt control member provided to the dozer control, an actuation of the tilt control member causing the dozer to be pivoted about the tilt pivot shaft; a controller having a swing control mode in which an actuation of the swing control causes the implement to be pivoted laterally, and an angle control mode in which an actuation of the swing control causes the dozer to be pivoted about the angle pivot shaft; and a mode change-over portion for switching a control mode of the controller between the swing control mode and the angle control mode.

Abstract: A control system for a machine is disclosed. The control system has a ground engaging tool operable to remove material from a surface at a worksite. The control system also has a controller configured to generate a desired single-pass excavation contour prior to engagement of the ground engaging tool with the surface. The desired single-pass excavation contour has one or more predefined characteristics.

Abstract: A line 93 is provided with a line 71 communicating the line 93 and a hydraulic oil tank 51. The line 71 is provided with a throttle 72 to construct a throttle-provided line 7. When air is trapped between the hydraulic oil tank 51 and the hydraulic pump 52, the hydraulic pump 52 is driven to discharge the air from the throttle-provided line 7 to the hydraulic oil tank 51, thereby removing the air in the hydraulic circuit 5. When the air is removed, resistance caused by the throttle 72 is increased, which makes hydraulic oil flow from a pilot pump 522 to a PPC valve. Since the throttle-provided line 7 realizes air removal with a simple structure, a hydraulic cylinder 44 can be supplied with the air-removed hydraulic oil from an initial stage, thereby enhancing responsiveness of the hydraulic cylinder 44.

Abstract: A hydraulic excavator includes: an oil-pressure cut valve for suspending pressure oil supply to a PPC valve; a lock switch for operating the oil-pressure cut valve; and a control device for controlling a switching of the oil-pressure cut valve. The control device includes: a lock-state determining unit that determines a lock state of working equipment by considering the status of the lock switch; a traveling-state determining unit that determines a traveling state of the hydraulic excavator; an alert-issuing controlling unit that issues an alert urging locking of the working equipment; and a relay control unit that actuates the oil-pressure cut valve to suspend the flow of pressure oil. The alert-issuing controlling unit issues the alert and the relay control unit actuates the oil pressure cut valve when the hydraulic excavator is determined to be traveling and the working equipment is determined not to be in the lock state.

Abstract: A hydraulic unit is switched among a first region A where a flow rate is adjusted by controlling a rotational speed of an electric motor while maintaining a displacement of a variable displacement pump at a maximum value, a second region B where the flow rate is adjusted by changing the displacement of the variable displacement pump while maintaining the rotational speed of the electric motor at a minimum value lower than the rotational speed in the first region A, and a third region C where, in a range where a discharge pressure of the variable displacement pump is larger than that in the first region A, the flow rate is adjusted by changing the rotational speed of the electric motor in a range larger than the minimum rotational speed, while maintaining the displacement of the variable displacement pump at an allowable maximum value that is derived from the discharge pressure and a maximum shaft torque of the electric motor.

Abstract: A system and method of assisting an operator of an excavating machine includes recommending a hop distance to move the machine based on the maximum distance that the machine can move and still be able to reach the bottom of the excavation that has already been dug by the machine during an excavating operation.

Abstract: The invention relates to a ground-working machine (11) equipped with a drive and with advancement members (21). Its advancement members (21) serve inter alia to carry a supporting structure (23) set apart from the positioning plane of the machine, on which supporting structure (23) there is arranged, in the region of a central axis (Z), a kirving tool (25) with at least one transverse kirving roller (13) for working a substrate on which the ground-working machine is standing. The kirving roller (13) is rotatable about its roller axis (V). The roller axis (V) is pivotable about a steering axis (W), which steering axis (W) is arranged in the direction of the central axis (Z) set apart from the advancement members (21).

Abstract: An electronic control device is disclosed for controlling a plow. The control device includes a pendant control structured and arranged such that an operator of the plow is permitted to control the plow by operation of the pendant control. A plurality of switches is mounted on the pendant control for selective operation by the operator. At least one of the switches of the plurality of switches being a multi stage switch which permits the operator to activate to different current driven settings.

Abstract: A self-propelled snow remover has a machine body, travel units mounted on the machine body to undergo turning movement and linear movement, and at least one steering member mounted to the machine body and operable to turn the travel units. A snow-removing implement is mounted to the machine body to undergo lifting, lowering and rolling movements relative to the machine body. A lift drive mechanism lifts and lowers the snow-removing implement. A control unit controls the lift drive mechanism by issuing a lift drive instruction to the lift drive mechanism so as to automatically lift the snow-removing implement when a steering condition in which the steering member is turned is determined to be satisfied, and by issuing a lowering drive instruction to the lift drive mechanism so as to automatically lower the snow-removing implement when the steering condition is determined to be no longer satisfied.

Abstract: A system is provided for positioning a work implement. The system has at least one actuator for actuating a movement of a work implement. The system also has at least one sensor associated with the at least one actuator and configured to sense at least one parameter indicative of a position and an orientation of the work implement. Furthermore, the system has a controller configured to automatically create a travel path for the work implement and guide the work implement in response to the data received from the at least one sensor, wherein the controller is further configured to automatically modify the travel path when detecting an imminent collision between the work implement and an obstacle.

Abstract: A self-propelled work machine, in which the load of the work unit increases according to an increase in the travel speed. The self-propelled work machine includes electric motors for driving the travel units, an engine for driving the work unit, a work drive instruction unit for instructing the work unit to turn on, and a control unit for controlling the electric motors. The control unit reduces the actual speed of the electric motors by using PID control so that the actual rotational speed of the engine returns to a reference rotational speed when the actual rotational speed of the engine falls below the reference rotational speed in the state in which the work unit is turned on by the work drive instruction unit. The reference rotational speed is a reference value used when the work unit is driven by the engine.

Abstract: For determining the load of an excavator bucket, or optionally of another holding region, a measurement step and an evaluation step are carried out. In the measurement step, the position of a load surface is determined by a noncontact distance-measuring device and, in the evaluation step, a load volume is determined from the position of the load surface and the position and shape of the excavator bucket or of the holding region. For determining the position of the load surface, at least one two-dimensional matrix with distance values is created by means of a distance-measuring camera. For determining the position of the excavator bucket, the distances to at least three points of the excavator bucket, in particular to points on the upper bucket edge, optionally to marked points are determined using the distance-measuring apparatus for determining the surface.

Abstract: The invention relates to a device for monitoring the safety of a bending pole (22) in a large manipulator, whereby the arms (23-27) of the mast can be pivoted in relation to each other by means of a drive unit (34-38). The relative position of the arms of the mast in relation to the respective adjacent arm of the mast or frame of the mast (21) is measured for adjusting the position thereof. According to the invention, the positing measuring values (?I) of the arms of the mast are used in order to control the safety of the drive units (34-38) or the actuators thereof (80-84) in relation to a variation of predefined safety values.

Abstract: A method and apparatus for using satellite positioning systems to more precisely locate the position of a portion of an attachment on an earthmoving machine is disclosed. More specifically, satellite positioning system antennas are mounted to an arm or other point relative to the arm of an illustrative excavator. A reference point relative to these antennas is used to determine the precise location of a portion of an attachment to the excavator, such as the prongs of a bucket. In one embodiment, an angle sensor or inclinometer is used to ascertain the position of the prongs when the bucket is scooped. In another embodiment, an angle sensor or inclinometer is used to measure the tilt of the body of the excavator, such as would occur when the excavator is resting on a sloped surface.

Abstract: A hydraulic pump displacement control apparatus for a working vehicle capable of reliably detecting the working vehicle under excavating operation and reducing loss in power is provided. For this purpose, the control apparatus includes a bottom pressure detector (45) for detecting a hydraulic pressure in a bottom side (13A) of a cylinder (60) for operating a working machine (10), a displacement control device (41) for controlling a displacement of a variable displacement hydraulic pump (26), and a controller (50) which determines that an excavating operation starts when a predetermined time elapses with a detection value from the bottom pressure detector at a predetermined value or less and thereafter, the detection value exceeds the predetermined value, and outputs a displacement control signal to reduce the displacement of the hydraulic pump to a predetermined displacement that is smaller than the maximum displacement to the displacement control device.

Abstract: A method is provided for enhancing the repositioning of an excavating machine, including an excavating assemblage, from one set-up position to a next, subsequent set-up position. A joystick is controlled in implement control mode to operate at least one of a boom, a stick, and a bucket of the excavating assemblage during a first excavating phase from a first machine set-up position. The first excavating phase is terminated and, during a machine repositioning phase, the machine is moved to a second machine set-up position for a second excavating phase at the second machine set-up position. After terminating the first excavating phase and before moving the machine to the second machine set-up position, an input/display device is accessed and activated to convert the joystick from implement control mode to machine control mode. At least machine steering and machine propulsion are controlled with the joystick set in the machine control mode during the machine repositioning phase.

Abstract: A system for use in conjunction with an underwater dredging apparatus having a power shovel with a bucket connected to a power housing by two articulated manipulator arms. The articulation of the manipulator arms relative to each other as well as one manipulator arm relative to the power housing controls both the horizontal position of the bucket as well as the vertical depth of the bucket. The system includes a data processor, a depth sensor which is attached to one manipulator arm at a predetermined position, as well as angle sensors which provide output signals of the relative angle of the manipulator arms relative to each other as well as relative to the power housing. The data processor is programmed to calculate the vertical depth of the bucket as a function of the depth sensor as well as the angle sensors. Once the bucket depth is calculated, the processor displays the bucket depth on a video display.

Abstract: A system is provided for controlling off-fall during trench excavation. The system includes a trench excavating assemblage. A mechanism moves the trench excavating assemblage from a position within a trench to be excavated to a position for dumping excavated material. A control system is configured to operate the trench excavating assemblage in an automated off-fall control mode to remove and/or compact off-fall along at least one edge of the trench.

Abstract: A control system for use with an excavation machine is disclosed. The control system may have a boom member, a linear actuator connected to pivot the boom member in a first direction, a rotary actuator connected to swing the boom member in a second direction substantially orthogonal to the first direction, and an operator input device configured to generate a command signal indicative of a desired movement of the boom member. The control system may also have a tilt sensor configured to detect an inclination of the excavation machine, and a controller in communication with the rotary actuator, the operator input device, and the tilt sensor. The controller may be configured to receive a swing end stop for the boom member, to control the rotary actuator to move the boom member based on the command signal, and to modify the command signal to inhibit movement of the boom member past the swing end stop based on the detected inclination of the excavation machine.

Abstract: A work vehicle with a working implement, comprising: a control lever 49 for controlling the working implement 3, the control lever being rockably disposed laterally of a driver's seat 16 mounted on a vehicle body 7; a control valve 52 disposed laterally of the vehicle body for controlling actuators 32, 44 that drive the working implement; and interlocking links 56, 57 for interlocking the control lever and spools 54, 55 of the control valve 52, and transmitting rocking of the control lever to the spools; wherein the control lever 49 and the spools 54, 55 are staggered transversely and longitudinally of the vehicle body 7, and the interlocking links 56, 57 are bent, one end of each interlocking link being connected to a first link connector 72, 68c connected to the control lever, the other end of each interlocking link being connected to a second link connector connected to one of the spools.

Abstract: A trencher has two wheels equidistant on either side of the arbor, and a third steerable wheel at the front of the trencher in line with the arbor. Speed of the arbor, forward motion of the trencher and the direction of motion are determined by motors controlled by an onboard control system. The onboard control system is controlled by a remote control, which may be a simple manual wireless controller or a programmable computer. With a programmable computer, the trencher can be pre-programmed to dig along a pre-selected path, e.g., a logo, flower or other design.

Abstract: A construction machine according to the present invention includes a variable displacement hydraulic pump (11, 12) driven by a prime mover (10), a single traveling actuator (5) driven with pressure oil discharged from the hydraulic pump (11), a plurality of work actuators (2a, 4d to 4f) driven with the pressure oil discharged from the hydraulic pump (11, 12), a plurality of control valves (13 to 17) that control flows of the pressure oil from the hydraulic pump (11) to each of the traveling actuator (5) and the plurality of work actuators (2a, 4d to 4f), a detection means (24) for detecting a drive command for the traveling actuator (5), and a flow rate control means (11a, 30, 40, 43) for increasing a maximum flow rate of the hydraulic pump (11) when the drive command for the traveling actuator (5) is detected with the detection means (24).

Abstract: An indicator control system with a camera section provided with a switch for switching from a measurement value display mode to a camera display mode and vice versa to display a selected mode on a monitor section of an indicator. The measurement value display mode shows the measurement data of an object to be monitored on a construction machine, and the camera display mode is for the camera section mounted on the construction machine.

Abstract: A work machine enabling a hybrid drive system to be directly driven by energy contained in a return fluid discharged from a hydraulic actuator. The work machine includes a hydraulic actuator control circuit and a swing control circuit. The hydraulic actuator control circuit serves to control hydraulic fluid supplied from pumps of a hybrid drive system to travel motors and work actuators. The swing control circuit serves to control a swing motor generator, which functions as an electric motor and, during braking of rotating motion of the upper structure, functions as a generator. The hydraulic actuator control circuit includes an energy recovery motor provided in a return passage, though which return fluid recovered from a work actuator flows. The energy recovery motor is adapted to be driven by return fluid and thereby drive a motor generator of the hybrid drive system.

Abstract: Certain exemplary embodiments can comprise a method for controlling a machine. The method can comprise a plurality of activities that can comprise determining a profile of a surface responsive to a scan of the surface. The method can comprise identifying a predetermined profile from a plurality of predetermined profiles, the identified predetermined profile a closest match of the plurality of predetermined profiles to the profile of the surface. The method can comprise determining a machine procedure based upon the identified predetermined profile. The method can comprise automatically executing the preferred machine procedure via a machine.

Abstract: Certain exemplary embodiments can provide a system comprising a processor adapted to determine a profile of a surface responsive to a scan of the surface. The processor can be adapted to identify a predetermined profile from a plurality of predetermined profiles, the identified predetermined profile a closest match of the plurality of predetermined profiles to the profile of the surface. The processor can be adapted to determine a procedure based upon the identified predetermined profile. The processor can be adapted to provide the procedure to a machine.

Abstract: To provide a construction machine capable of encouraging an operator to perform the driving and the operation for enhancing fuel efficiency. The construction machine includes information providing means 30 to notify the operator of the information such as the operation and/or an operational method or the like to enhance the fuel efficiency. The present construction machine provides the information by monitor display on a monitor screen 26 that is provided in an operator's cabin 11. When operating machine levers 19 and 20 are positioned at a neutral position, if an engine 40 has the idle revolution number not less than a predetermined time, the information providing means 30 provides the information such as the operation or the like to enhance the fuel efficiency.

Abstract: A pilot pressure control valve V17 is provided that is switchable between an operation position 56 where pilot pressure is supplied to a first channel switching valve V12 and a non-operation position 57 where pilot pressure is not supplied to the first channel switching valve V12; this pilot pressure control valve V17 is switched to the non-operation position 57 during a state of non-travel and is switched to the operation position 56 with a pilot pressure established in a travel detection circuit 54, and in the operation position 56, supplies a pilot source pressure to the first channel switching valve V12 from a fourth pump P4 on the upstream side of a pressurized oil introduction orifice 53.

Abstract: A trencher has two wheels equidistant on either side of the arbor, and a third steerable wheel at the front of the trencher in line with the arbor. Speed of the arbor, forward motion of the trencher and the direction of motion are determined by motors controlled by an onboard control system. The onboard control system is controlled by a remote control, which may be a simple manual wireless controller or a programmable computer. With a programmable computer, the trencher can be pre-programmed to dig along a pre-selected path, e.g., a logo, flower or other design.

Abstract: A boom control circuit for controlling hydraulic fluid fed to a boom cylinder is provided separately and independently from a travel/stick/bucket control circuit, which serves to control hydraulic fluid fed to travel motors, a stick cylinder, and a bucket cylinder. The boom control circuit includes a boom pump, an energy recovery motor disposed in a return passage through which return fluid from the boom cylinder 8bmc passes, and a boom motor generator connected to the energy recovery motor. The aforementioned boom pump is connected through a clutch to the boom motor generator. The invention is capable of providing a work machine of which a boom control circuit is adapted to function independently so that the flow rate required by the boom control circuit can be easily ensured.

Abstract: An arm direction changeover valve (11) is provided in an arm block (20). A first pilot check valve (18) is provided in a first block (21). A second pilot check valve (19) is provided in a second block (22). The three blocks, i.e., the arm block (20), the first block (21), and the second block (22) are arranged side by side. The first block (21) and the second block (22) are arranged to be contiguous to each other. Accordingly, an increase in size can be prevented even if a float mechanism and a multi-direction changeover valve are formed integrally with each other.

Abstract: A backhoe loader with a controller that uses angular signals from at least one sensor to calculate a loader tool angle with respect to the vehicle frame or with respect to the earth and to maintain the loader tool angle via controller generated commands to a tool actuator as a function of the angular signals and commands to a boom actuator. The controller enables proportional control of the tool angle via a command input device such as an electronic joystick. If the electronic joystick is moved to an appropriate detent position, the controller executes a return to carry function.

Abstract: The invention is intended to provide an excavation teaching device for a construction machine which can realize easy confirmation of a proper target excavation surface and increase the working efficiency during excavation even in work of forming the face of slope in complicated three-dimensional landforms. A display unit (46) displays, as an image in a first screen area (46a), a plurality of small plane surfaces G constituting a three-dimensional target landform and illustrations of a body S of the construction machine and a bucket B as an excavating tool at a fore end of an operating mechanism.

Abstract: A control system for a machine operating at a excavation site is disclosed. The control system may have a positioning device configured to determine a position of the machine, and a controller in communication with the positioning device. The controller may be configured to receive information regarding a predetermined task for the machine, receive the machine's position, and receive a location of an obstacle at the excavation site. The control system may also be configured to recommend placement of the machine to accomplish the predetermined task based on the received machine position and obstacle location.

Abstract: An excavation support database 40 includes a display table 47 and a display specifics table 48, which serve as storage means dedicated for display. The state of a working region per mesh is stored in the display table 47, and a discriminative display method (display color) is stored in the display specifics table 48 corresponding to the state per mesh. Reference is made to the display specifics table 48 on the basis of the state (height) per mesh, which is stored in the display table 47, to read the corresponding display color from the display specifics table 48, thereby displaying the state of the working region in a color-coded manner. Operation support and management realized with this system can easily be employed in different types of working machines in common and can inexpensively be performed with ease.

Abstract: To permit smooth performance of both of an operation requiring a high pressure and an operation desired to produce a pressure at a suppressed level, a shuttle block positioned between pilot operating units and flow control valves and pump regulators is arranged in association with shuttle valves, which select maximum pressures of groups of operation signal pressures produced by the pilot operating units, respectively, and at least one of the plural groups of operation signals, and is constructed to include hydraulic selector valves and a boom-lowering, hydraulic selector valve that are operable in particular ways.

Abstract: In a hybrid construction machine, its display device displays, toward an operator, an artificial engine sound serving as load information according to a magnitude of a workload, instead of an engine sound. Furthermore, the display device issues an alarm sound to surrounding workers when performing an operation by only stored electrical power of an electrical energy storage device without using an engine. In this hybrid construction machine, in addition to the issuing of alarm from the display device during the operation without using the engine, the display device issues an advance notice sound for engine restart when at least one value out of the workload and a charge amount of the electrical energy storage device has become an advance notice set value close to a set value of engine restart.

Abstract: The present invention is related to a loader of a construction apparatus such as front-end wheel loader or an agricultural tractor. Specifically, the present invention is related to a control system for a loader.

Abstract: The invention relates to a hydraulic control system for building machinery, particularly for controlling hydraulic consumers of an excavator. According to the invention, pump channels which ensure that the hydraulic consumers are supplied in parallel by means of a spool valve of the main control unit of the piece of building machinery are provided in addition to previously existing pump channels that ensure said hydraulic consumers are serially supplied with hydraulic fluid. The additional pump channels are arranged parallel to the previously existing ones.

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.

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 using an engine speed to determine a load multiplier. The load multiplier being defined as a function of the engine speed and an operator adjustable load control setting.

Abstract: A work machine is provided having a starter motor for starting a prime mover, which without provision of any special hydraulic equipment, allows for draining pressure oil that still remains in a hydraulic actuator for driving a front attachment. The work machine is provided with a boom cylinder for driving a front attachment, a flow rate control valve for controlling a flow of pressure oil to be supplied to the boom cylinder, and a pilot valve for producing an output of a pilot control signal, which serves to switch the flow rate control valve, by using, as a primary pressure, pressure oil delivered from a pilot hydraulic pump driven by an engine. A fuel stop switch is provided for performing stop control on a supply of fuel, which drives the engine, and a switch is provided for maintaining drivable a starter motor, which starts the engine, responsive to the stop control of the supply of fuel to the engine by the fuel stop switch.

Abstract: A method is provided for dissipating power in a propelled machine having an electric drive system and a mechanical brake system. An inclination of the machine is determined. A speed of the machine is determined. A retarding requirement is determined based on the determined inclination and speed. A first portion of the retarding requirement is allocated to be met by the electric drive system, the first portion being less than or equal to a retarding capacity of the electric drive system. A second portion of the retarding requirement is allocated to be met by the mechanical brake system if the retarding requirement is greater than the retarding capacity of the electric drive system.

Abstract: Certain exemplary embodiments can provide a system, which can comprise a bucket excavation controller. The bucket excavation controller can be adapted to control one or more digging functions of a mining excavator. For example, the bucket excavation controller can be adapted to automatically control a crowd motion of the mining excavator.

Abstract: A first hydraulic cylinder is associated with the boom having a first end and a second end opposite the first end. A first sensor detects a boom angle of a boom with respect to a support (or a vehicle) near the first end. An attachment is coupled to the second end of the boom. A second hydraulic cylinder is associated with the attachment. A second sensor detects an attachment angle of attachment with respect to the boom. An accelerometer detects an acceleration or deceleration of the boom. A switch is arranged to accept a command to move to a preset position from another position. A controller is capable of controlling the first hydraulic cylinder to attain a boom angle within the target boom angular range and for controlling the second cylinder to attain an attachment angle within the target attachment angular range associated with the preset position in response to the command in conformity with at least one of a desired boom motion curve and a desired attachment motion curve.