The Sauer Danfoss H1 pump used in the FR9000 Series harvester can deliver full performance at input speeds as low as 1200 rpm, which reduces engine noise, fuel consumption, and emissions.
With lower engine speed, the FR9000 Series consumes 25% less fuel and produces 25% fewer emissions overall, bringing the harvesters into line with international emission standards when travelling on the road.
Sauer-Danfoss also supplies its Series 90 axial-piston pumps and motors sized at 100 cm3 to power header and roll drives, which pull grass or corn into the machine and feed it to knives that chop it into 6- to 40-mm pieces. An integrated stop block in the Series 90 motor for the feeder drive can stop the motor within 70 msec. Not only does this protect the knives when metal is detected in the crop, it also prevents sharp objects from getting into animal feed.
Precision steering is provided by a Sauer-Danfoss OSPC 185 steering unit, 11 cm3 gear pump, and electrohydraulic proportional valve with PVEP actuator. The PVEP is an electrohydraulic actuator serving as a pilot stage. It is a true mechatronic module comprising a digital solenoid valve bridge, a contactless transducer, and control electronics in one package designed for the rigors of mobile equipment. It has two low frequency PWM inputs that determine the set point for controlling the valve’s main spool. Using this control into the valve makes the vehicle suitable for automatic row guidance.
Two-minute changeover
From the cutting drum to the blower that discharges the forage into a trailer, CNH has optimized the entire crop flow using its patented Variflow system. A distinctive attribute of Variflow is its time-saving capacity to switch from corn crushing to hay cutting within just two minutes. The harvester’s overall work functions make use of various orbital motors, a load-sensing 75 cm3 Sauer-Danfoss Series 45 axial-piston pump, and seven customized hydraulic integrated circuits (HICs).
Sauer-Danfoss worked with CNH to develop one of the first PVG hybrids for a reverse knife sharpening mechanism, pickup drive (each powered by a Group 3 gear motor), and high-flow implements. This integrated component brings together the power capability of the Sauer-Danfoss PVG valve within a compact HIC — a cost-effective, flexible solution with high flow and proportional control.
The forage is discharged from the harvester via a spout, where an orbital motor drives the spout’s rotational movement. On the end of the spout, a flipper ensures the forage is discharged accurately into the trailer, aided by a proprietary Sauer-Danfoss proportional directional valve.
Continuing cooperation
The Sauer-Danfoss hydraulics on the FR9000 series have been fully integrated with the CNH in-house control system. And Osselaere offered that the teamwork has not stopped with this series launch. “We are now working on a system using Sauer-Danfoss Plus+1 controls for a special machine version that integrates the harvester with the trailer. Today, on our CR9080 combine harvesters, we are also using the H1 165 cm3 pump for the benefits it provides in relation to reduced noise and fuel consumption.”
This article is based on material originally appearing in Issue #11 of “The Circuit,” a quarterly publication from Sauer-Danfoss. For more information, visit www.sauer-danfoss.com.