SBUC Application Example Excavators

SBUC with load limiting control functions

SBUC controls loading of the excavator's diesel engine for:

— reduction of fuel consumption;
— power management between diesel motor and hydraulics;
— automatic protection of the diesel engine.

Functionality

— motor speed contol by management of fuel injection pump and productivity of hydraulic pumps;
— management of the fuel injection pump lever on controller commands;
— simplification of start and engine warming-up at a low ambient temperature;
— automatic switching in idle mode at pauses in excavator work;
— protection diesel motor from overload and overheating of engine coolant;
— protection excavator hydrosystem from overload and overheating of hydraulic fluid.

Example of a complete set of SBUC system for excavators

— SBUC SM4 controller;
— mode control panel;
— electromechanical actuator for management of diesel fuel injection pump (for diesel engines with mechanical fuel supply system);
— variable displacement pumps;
— hydraulic oil temparature sensor;
— two hyfraulic pressure transducers;
— set of cables.

The block schematic of SBUC for engines with mechanical fuel supply system

The modes of operation are set from the control panel, which is established in a excavator cabin.

The control panel contains the switch, which allows to disconnect or to choose the mode of operation with engine loading for 75%, 88%,100% and idling.

Control Panel

Values of parameters are set by the software and can be changed at the customer's request.

Technical Data

Íàïðÿæåíèå ïèòàíèÿ, Â îò 10 äî 32
Çàäàâàåìûå ðåæèìû ðàáîòû äèçåëüíîãî äâèãàòåëÿ õîëîñòîé õîä, 75, 88 è 100%
Óïðàâëåíèå òîïëèâíûì íàñîñîì âûñîêîãî äàâëåíèÿ:  
  • äèàïàçîí óãëà ïîâîðîòà âûõîäíîãî âàëà, ãðàä., íå ìåíåå
    äî 95±5
    • âðàùàþùèé ìîìåíò, Íì, íå ìåíåå
      10
      • âðåìÿ ïîâîðîòà âûõîäíîãî âàëà íà óãîë 90°, ñ, íå áîëåå
        2
        • ïîãðåøíîñòü óãëîâîãî ïåðåìåùåíèÿ, ãðàä., íå áîëåå
          ±1
          Ïîãðåøíîñòü èçìåðåíèÿ, íå áîëåå:  
          • òåìïåðàòóðû ìàñëà â ãèäðîñèñòåìå, °C
            ±3
            • òåìïåðàòóðû îõëàæäàþùåé æèäêîñòè, °C
              ±3
              • äàâëåíèÿ, àòì.
                ±0,1
                • ÷àñòîòû âðàùåíèÿ êîëåí÷àòîãî âàëà äâèãàòåëÿ, % (ïðè 1000 îá/ìèí)
                  ±2
                  Òî÷íîñòü ñòàáèëèçàöèè âðàùåíèÿ êîëåí÷àòîãî âàëà äâèãàòåëÿ, % 5
                  Ñòåïåíü çàùèòû ïàíåëè óïðàâëåíèÿ îò âíåøíèõ âîçäåéñòâóþùèõ ôàêòîðîâ ïî ÃÎÑÒ 14254: IP40
                  Äîïóñòèìûå âèáðàöèîííûå íàãðóçêè  
                  • ìàêñèìàëüíîå óñêîðåíèå, ì/ñ2
                    50
                    • â äèàïàçîíå ÷àñòîò, Ãö
                      îò 50 äî 200
                      Äîïóñòèìûå óäàðíûå íàãðóçêè, ì/ñ2, íå áîëåå 100
                      Ãàáàðèòíûå ðàçìåðû ïàíåëè óïðàâëåíèÿ, ìì, íå áîëåå: 105 × 85 × 79
                      Ìàññà ïàíåëè óïðàâëåíèÿ, êã, íå áîëåå: 0,3


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