A method is provided for determining a weight of a payload carried by a support structure of an agricultural utility vehicle via a hitch. The hitch includes at least one upper link and at least one lower link. The method includes determining the weight based on at least one of (1) an angle between the upper link and a vehicle horizontal, and (2) a holding force that arises at a connection between the upper link and the payload and is effective along the upper link.

An attachment for a tractor including a frame with a forward portion and a rear portion, the rear portion pivotally connected to the forward portion; and two or more shanks attached to the forward portion.

A method of operating an attachment for a tractor including connecting an attachment to a tractor, the attachment including a frame and two or more shanks, the frame including a forward portion and a rear portion, the shanks being attached to the forward portion and pivoting the rear portion of the frame relative to the forward portion of the frame.

An attachment for a tractor including a frame with a forward portion and a rear portion, the rear portion pivotally connected to the forward portion; and two or more shanks attached to the forward portion.

A method of operating an attachment for a tractor including connecting an attachment to a tractor, the attachment including a frame and two or more shanks, the frame including a forward portion and a rear portion, the shanks being attached to the forward portion and pivoting the rear portion of the frame relative to the forward portion of the frame.

A tractor control system, which controls an operating condition of an implement attached to the tractor. The control system includes a sensing means providing a force signal which indicates the pull force necessary to pull an implement in a desired position; a control which receives the force signal; and means for measuring at least one parameter associated with the tractor mode and/or the implement mode and the implement position is adjusted to a new position when the force signal varies. The control system includes pre-determined values associated with certain tractor and/or implement modes. A measured parameter is compared with a pre-determined parameter value and if the measured parameter would result in an undesired movement of the implement, the force signal is deactivated, or the response to the force signal is deactivated to prevent undesired movement of the attachment.

A tractor control system, which controls an operating condition of an implement attached to the tractor. The control system includes a sensing means providing a force signal which indicates the pull force necessary to pull an implement in a desired position; a control which receives the force signal; and means for measuring at least one parameter associated with the tractor mode and/or the implement mode and the implement position is adjusted to a new position when the force signal varies. The control system includes pre-determined values associated with certain tractor and/or implement modes. A measured parameter is compared with a pre-determined parameter value and if the measured parameter would result in an undesired movement of the implement, the force signal is deactivated, or the response to the force signal is deactivated to prevent undesired movement of the attachment.

A tractor linkage arrangement (10) to attach work equipment (20) to a tractor comprising a subframe (100), which is to be attached to a tractor chassis (11), comprising a first (103), a second (104), a third (105) and a fourth fixing point (106), a first support (101) comprising a first and a second spindle opening (107, 108), and a second support (102) comprising a third and a fourth spindle opening (109, 110), further comprising a first lifting arm (140), which is pivotally attached from its first end to the first support (101), a second lifting arm (141), which is pivotally attached from its first end to the second support (102), wherein the first lifting arm (140) is comprising a first lifting pin (142) on one side of the first lifting arm (140) and first gripping pin (144) on the other side of the first lifting arm (140), and wherein the second lifting arm (141) is comprising a second lifting pin (143) on one side of the second lifting arm (141) and a second gripping pin (145) on the other side of the second lifting arm (141), and a work equipment adapter (120), which is to be attached to a work equipment (20), the work equipment adapter comprising a first link arm (121) and a second link arm (122), a first, a second, a third and a fourth spindle opening (123, 124, 125, 126), wherein the first link arm (121) comprises a first grab (129) and the second link arm (122) comprises a second grab (130), wherein the first gripping pin (144) is to be fitted to the first grab (129) and the second gripping pin (145) is to be fitted to second grab (130).

A work machine according to the present invention includes a manual operating tool configured to operate a hydraulic actuator; an operation amount detector configured to detect an operation amount of the manual operating tool; a hydraulic pump configured to generate a hydraulic pressure to be supplied to the hydraulic actuator; an electric pump motor configured to change an output characteristic of the hydraulic pump in response to a rotary force to be given to the hydraulic pump; a motor load detector configured to detect a motor load of the pump motor; and a pump motor controller configured to determine a necessary output characteristic based on the operation amount and the motor load and control the pump motor based on the output characteristic.

A work machine according to the present invention includes a manual operating tool configured to operate a hydraulic actuator; an operation amount detector configured to detect an operation amount of the manual operating tool; a hydraulic pump configured to generate a hydraulic pressure to be supplied to the hydraulic actuator; an electric pump motor configured to change an output characteristic of the hydraulic pump in response to a rotary force to be given to the hydraulic pump; a motor load detector configured to detect a motor load of the pump motor; and a pump motor controller configured to determine a necessary output characteristic based on the operation amount and the motor load and control the pump motor based on the output characteristic.

A vehicle has a working component and a user-operable control device for controlling the working component. A method is used for controlling the working component by determining a first speed demand dependent on a first current operating range of the user-operable control device out of first and second operating ranges, and controlling a speed of a first motion drive connected with the working component according to the first speed demand. The first speed demand changes in a first discrete step in response to a movement of the user-operable control device from the first operating range to the second operating range.

A vehicle has a working component and a user-operable control device for controlling the working component. A method is used for controlling the working component by determining a first speed demand dependent on a first current operating range of the user-operable control device out of first and second operating ranges, and controlling a speed of a first motion drive connected with the working component according to the first speed demand. The first speed demand changes in a first discrete step in response to a movement of the user-operable control device from the first operating range to the second operating range.