An arrangement for control of the drive speed of a harvester comprises an internal control loop for control of the drive speed of the harvester, to which can be sent a set value and an actual value of a throughput-dependent parameter, and also an external control loop to make available the set value of the throughput-dependent parameter for the internal control loop, to which set and actual values regarding the power output of a drive of the harvester can be sent as input parameters.

A header for an agricultural harvester is disclosed. The header comprises a frame, a cooler assembly support by the frame for cooling a hydraulic system of the header, and a hydraulic system. The cooler assembly includes an air pre-cleaner for receiving air and outputting a flow of air, a rotary fan downstream the air pre-cleaner, and a heat exchanger downstream and in fluid communication with a first air output of the rotary fan. The rotary fan includes an air intake in fluid communication with the air pre-cleaner for receiving the flow of air, a first air output in fluid communication with the air intake, and a second air output in fluid communication with the air intake and spaced from the first air output. The hydraulic system is downstream the heat exchanger and receives an output flow of air from the cooler assembly.

An agricultural mowing device includes a shaft, a first cutting device, and a second cutting device. The shaft has an upper section, a middle section, and a lower section. The shaft is advanced in a field between two adjacent rows of planted matter. The first cutting device is mounted to the lower section of the shaft. The first cutting device extends laterally from the shaft to a distance covering only a distance between the two adjacent rows. The first cutting device cuts plant matter that grows between the two adjacent rows. The second cutting device is mounted to the middle section of the shaft. The second cutting device extends laterally from the shaft to a distance covering at least a portion of at least one of the two adjacent rows. The second cutting device cuts plant matter that grows in the at least one of the two adjacent rows.

An agricultural mowing device includes a shaft, a first cutting device, and a second cutting device. The shaft has an upper section, a middle section, and a lower section. The shaft is advanced in a field between two adjacent rows of planted matter. The first cutting device is mounted to the lower section of the shaft. The first cutting device extends laterally from the shaft to a distance covering only a distance between the two adjacent rows. The first cutting device cuts plant matter that grows between the two adjacent rows. The second cutting device is mounted to the middle section of the shaft. The second cutting device extends laterally from the shaft to a distance covering at least a portion of at least one of the two adjacent rows. The second cutting device cuts plant matter that grows in the at least one of the two adjacent rows.

The invention relates to a system for hydraulic actuation of multiple consumer units comprising a hydraulic circuit (130) operated by means of a hydraulic motor (122) which actuates a consumer unit (111) wherein, downstream of the first consumer unit (111), the hydraulic circuit (130) has at least one secondary circuit (140, 150) having at least a second consumer unit (114, 118) and arranged before the second consumer unit (114) and a pump (113, 117) directly or indirectly actuated by the first consumer unit (111).

Methods for autonomous operation of harvesters use header drive pump displacement, header speed, harvester ground speed, engine load and engine speed to control and maximize harvester operation under varying conditions such as crop type, crop condition and terrain. Adaptive learning processes within the methods relate the parameters of pump displacement with header speed and engine speed during harvester operation to permit the control system to establish combinations of related control parameters which are used by a control system to control harvester operation.

Methods for autonomous operation of harvesters use header drive pump displacement, header speed, harvester ground speed, engine load and engine speed to control and maximize harvester operation under varying conditions such as crop type, crop condition and terrain. Adaptive learning processes within the methods relate the parameters of pump displacement with header speed and engine speed during harvester operation to permit the control system to establish combinations of related control parameters which are used by a control system to control harvester operation.

A harvester (1), comprising a harvester aggregate (2) for felling, trimming and preparing tree trunks, a first measuring device (I) provided in connection with the harvester aggregate (2) for measuring of at least one dimension of a tree trunk. The harvester comprises a second measuring device (II) for measuring a feature of the first measuring device, whereby said feature is an attribute reflecting the capability of the first measuring device to measure said dimension correctly, and a control unit (11) configured to make a comparison between an actual value (a) of the measured feature and a target value (β) of said feature, whereby the target value is indicative of a state of the first measuring device, where its measurement of said dimension is considered to be correct.

A harvester (1), comprising a harvester aggregate (2) for felling, trimming and preparing tree trunks, a first measuring device (I) provided in connection with the harvester aggregate (2) for measuring of at least one dimension of a tree trunk. The harvester comprises a second measuring device (II) for measuring a feature of the first measuring device, whereby said feature is an attribute reflecting the capability of the first measuring device to measure said dimension correctly, and a control unit (11) configured to make a comparison between an actual value (a) of the measured feature and a target value (β) of said feature, whereby the target value is indicative of a state of the first measuring device, where its measurement of said dimension is considered to be correct.

An agricultural apparatus including an agricultural vehicle and a number of work units suitable for cutting a standing crop. The work units include a front work unit and two lateral work units located behind and to the sides of the front work unit, each of the work units depositing cut crop as a swath. Each of the lateral work units is supported from a central chassis by a hydraulic system. A plurality of sensors determine a speed of the agricultural vehicle, a speed of operation of each lateral work unit and a relief pressure in the hydraulic system of each lateral work unit. A control unit is configured to receive inputs from the plurality of sensors, compare the values for a desired vehicle speed or speed of operation of the mower unit and adjust the pressure relief in the hydraulic system based on this comparison. The inertia of the hydraulic control system can accordingly be compensated for and the work units are able to follow the terrain contour, resulting in an even cut.