A control system and method for adjusting a rotational speed of a header on an agricultural vehicle based on ground speed of the agricultural vehicle. The header may include a plurality of cutters rotatably actuated with a header actuator. The control system may have a processor that compares a ground speed of the agricultural vehicle with a threshold ground speed. If the ground speed of the agricultural vehicle is below the threshold ground speed, the processor may command the header actuator to rotate the cutters at a constant predetermined rotational speed. If the ground speed of the agricultural vehicle is above the threshold ground speed, the processor may command the header actuator to increase rotational speed of the cutters in proportion to the ground speed of the agricultural vehicle.

A cutting system for a harvesting header includes a transversely extending cutter bar, a transversely extending knife back, a knife section mounted to the knife back having a knife edge extending generally in a forward direction, a knife guard component having a front guard portion and a rear portion interconnected by a medial portion having a recess. The medial portion is configured for receiving a lengthwise portion of the knife back with the knife section being received into, and the knife section is operable to move transversely into and out of a cutting slot in the front guard portion. A hold down component is located between an upper surface of the rear portion of the knife guard component and an underneath surface of the cutter bar, and an attachment mechanism is operable to secure the knife guard component and the hold down component to the underneath surface of the cutter bar.

A cutting system for a harvesting header includes a transversely extending cutter bar, a transversely extending knife back, a knife section mounted to the knife back having a knife edge extending generally in a forward direction, a knife guard component having a front guard portion and a rear portion interconnected by a medial portion having a recess. The medial portion is configured for receiving a lengthwise portion of the knife back with the knife section being received into, and the knife section is operable to move transversely into and out of a cutting slot in the front guard portion. A hold down component is located between an upper surface of the rear portion of the knife guard component and an underneath surface of the cutter bar, and an attachment mechanism is operable to secure the knife guard component and the hold down component to the underneath surface of the cutter bar.

A vegetation cutting device comprising a housing rotatably coupled to a shaft; a cutting head comprising a rotary cutting device for cutting vegetation, the cutting head being coupled to the shaft and being arranged to move between an edging mode in which the rotary cutting device rotates in a substantially horizontal plane; a motor mounted in the housing, the motor being arranged to drive the rotary cutting device; and a switching device mechanically coupled between the housing and the shaft and arranged to be actuated when the shaft rotates relatives to the housing thereby changing the speed of the rotary cutting device when the cutting head moves between the edging mode and trimming mode.

A vegetation cutting device comprising a housing rotatably coupled to a shaft; a cutting head comprising a rotary cutting device for cutting vegetation, the cutting head being coupled to the shaft and being arranged to move between an edging mode in which the rotary cutting device rotates in a substantially horizontal plane; a motor mounted in the housing, the motor being arranged to drive the rotary cutting device; and a switching device mechanically coupled between the housing and the shaft and arranged to be actuated when the shaft rotates relatives to the housing thereby changing the speed of the rotary cutting device when the cutting head moves between the edging mode and trimming mode.

The disclosure provides a two-cycle engine and an engine work machine. When a piston is located on the side of a bottom dead center, at a part corresponding to a notch part in the piston, an inner surface of the crank case protrudes toward an interior side to form a crank case first protruding part penetrating through the notch part toward the interior side. Meanwhile, the crank case at a part corresponding to a part without the notch part in the piston is not in a shape protruding toward the interior side. By assembling the piston and the crank case in such shapes, the piston is able to reciprocally move up and down without interfering with the crank case. In this case, by disposing the crank case first protruding part, the volume in the crank case is able to be reduced.

A harvesting knife has a base body, which is configured to be applied in a manner rotating in a machine around a drive rotational axis allocated to said base body, and has a plurality of teeth on its circumference

wherein, prior to a first application, at least one of the teeth has at least one cutter formed thereon.

A harvesting knife has a base body, which is configured to be applied in a manner rotating in a machine around a drive rotational axis allocated to said base body, and has a plurality of teeth on its circumference

wherein, prior to a first application, at least one of the teeth has at least one cutter formed thereon.

A harvesting knife has a base body, which is configured to be applied in a manner rotating in a machine around a drive rotational axis allocated to said base body, and has a plurality of teeth on its circumference wherein, prior to a first application, at least one of the teeth has at least one cutter formed thereon.

A harvesting knife has a base body, which is configured to be applied in a manner rotating in a machine around a drive rotational axis allocated to said base body, and has a plurality of teeth on its circumference wherein, prior to a first application, at least one of the teeth has at least one cutter formed thereon.