3 - Description
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DynamicFluid4 Pressure Regulation
Traditional fluid regulation starts, when the nozzles are opened. With DynamicFluid4 the regulation is a continuous process,
even if the nozzles are closed.
The DynamicFluid4 system is based on 5 sensors that the sprayer computer uses to calculate an optimal regulation. The
sensors are also back-up for each other, ensuring that the system can continue regulation - even if one or more sensor
signals fails.
The applied 5 sensors measure:
1. Driving speed.
2. Pump RPM.
3. Regulation valve opening angle.
4. Fluid flow.
5. Fluid pressure.
DynamicFluid4 uses the following parameters/variables to regulate:
• Driving Speed.
• Pump RPM.
• Active Sections.
Then DynamicFluid4 starts to move the regulation valve towards the
calculated final position, immediately after the operator makes any changes.
During the spray job, there are two scenarios:
Nozzles ON
The sensor input to the regulation system is live.
Nozzles OFF
The regulation is now based on a simulation of the previous spray situation. This is called FeedForward and it foresees the
correct opening of the regulation valve. Thereby it is extremely fast to obtain the correct application rate when the nozzles
are opened.
Even when closing all but one nozzle on a very wide boom, it is quick to achieve the correct and stable application rate. The
benefit is more precise application rates immediately when spraying begins.
Features for DF4
• A synthetic or ceramic disc and a stainless steel disc regulate the pressure and ensure quick reaction and zero leakages.
• Very fast and accurate regulation when all sensors are active, setup in controller menus are correct, and pump, filters
and valves are in good condition. The system measures and calculates 20 times per second.
• Quick reacting valve, when sections are turned On/Off, and at speed changes.
• Optimized AutoSectionControl feature that predict boom sections to open/close and optimized nozzle pressure.
• Optimized for different PTO systems.
• Nozzle surveillance. No setup or tuning is required for nozzle change.
• Controller display can show the current nozzle output, which can be compared with the rated output. A significant
difference in output is caused by failures occurring in the liquid system, such as:
• Severe clogging of filters.
• Large leakages on hoses and fittings.
• All functions work, though with degraded performance (limp-home modes), if:
• Failures occur in the fluid system, e.g. pump defects, clogged filters or leaking valves.
• Failures occur on the pressure sensor, flow sensor or pump sensor.
• There is a wrong setup of sprayer data in the menus.
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