A cleaning fan on an agricultural harvester generates airflow along an airflow path through a fan duct. A movable flap is mounted relative to the fan duct and controlled to divert the airflow path in a side-to-side transverse direction relative to a front-to-back longitudinal axis of the agricultural harvester.

Disclosed is an articulated harvesting combine of a forward power processing unit (PPU) and a rear grain cart, wherein the PPU carries dual axially mounted engines with oppositely opposed crankshafts with one toward the rear grain cart and the other engine away from the rear grain cart, there being no comingling of flywheel output power flow between the two engines.

The disclosure provided herein is directed to an agricultural products cleaning machine for cleaning agricultural products, such as grains in general, whereby the agricultural products are thrown against a sieve system with curved sieves in the shape of a volute by a grain transport and elevation system or bucket elevator. When thrown, the agricultural products move along as a spiral curtain which collides with the curved surface of the sieve, promoting the separation of agricultural products from impurities. The sieve allows adjustment of the mesh, so that a simple adjustment allows the separation of diverse agricultural products without having to change the sieve to a bigger or smaller mesh

A combine harvester includes threshing apparatus, separating apparatus, a grain cleaning system located downstream of the separating apparatus, and a material conveyance system arranged to convey crop material from the separating apparatus to the grain cleaning system. The grain cleaning system includes screening apparatus, a fan arranged to generate a cleaning airstream through the screening apparatus, and a fan control system configured to control a fan speed. The fan control system includes a proximity sensor mounted above the material conveyance system for sensing a material volume. The fan control system controls the fan speed in dependence upon the material volume.

A system for detecting a condition indicative of onset of plugging or actual plugging of a discharge of an agricultural combine, utilizing a pressure sensor disposed at a location within the combine spaced from the discharge and operable for sensing an air pressure condition relating to a flow indicative of a reduced crop residue flow condition toward or in the discharge.

An agricultural harvester includes a chassis, a cleaning system carried by the chassis, a crop material elevator supplied with crop material that has passed through the cleaning system and has a first inlet and a second inlet, and an auger system supplying the crop material from the cleaning system to the crop material elevator. The auger system includes a first auger defining an auger axis that extends in a conveying direction toward the crop material elevator and is configured to supply crop material to the first inlet, a second auger defining a second auger axis that extends in the conveying direction, and a crop material conveyor configured to supply crop material from the second auger to the second inlet generally transverse to the second auger axis.

A combine harvester includes a grain pan arranged to catch a crop stream, the grain pan being driven in an oscillating manner to convey the crop stream rearwardly to a rear edge. A cleaning unit includes a fan for generating a cleaning airstream which is directed under the rear edge. The grain pan includes a floor profile which defines a transverse profile having ridges and troughs. The troughs provide a plurality of longitudinal channels, wherein the ridge-to-trough height increases in the direction of conveyance. Crop material conveyed by the grain pan experiences channels that deepen towards the rear edge of the pan.

An agricultural harvester includes a chassis, a cleaning system carried by the chassis, and a crop material elevator for receiving crop material that has passed through the cleaning system. The crop material elevator has a top-most end, a bottom-most end, a first inlet between the top-most end and the bottom-most end, and a second inlet between the top-most end and the first inlet. The agricultural harvester also includes an auger system for supplying crop material from the cleaning system to the crop material elevator. The auger system includes a first auger defining an auger axis for supplying crop material to the first inlet, a second auger defining a second auger axis, and a crop material conveyor for supplying crop material from the second auger to the second inlet.

A tailings conveyance including a housing having a front plate, a back plate, and a wall, and is adapted to recycle tailings through a cleaning system of a combine using at least one impeller. The wall of the housing describes an arc near the impeller paddles over a segment of a circle described by the circumference of the impeller. The wall further continues on a tangent away from the circle at a point of tangency. A sensor is positioned proximate to the point of tangency, and senses whether a space between the front plate and the back plate directly adjacent to the sensor is obscured by tailings as the impeller rotates. A controller or control system connected to the sensor calculates an amount or percentage of time the space between the front plate and the back plate directly adjacent to the sensor is obscured by tailings as the impeller rotates.

An air cleaning element comprises a generally rectangular frame comprising a first two opposing sides and a second two opposing sides; a plurality of rods supported on and extending between the first two opposing sides, wherein each rod is offset from its two adjacent rods; and a wire mesh sheet that is generally rectangular and corrugated around the plurality of rods. The sheet extends to and between the two opposing sides.