Sistem Kontrol Hydraulic Excavator Hitachi ZX200

Main controller (MC) digunakan untuk mengontrol operasi mesin. Signal kelistrikan dari engine control dial, dan bermacam sensor dan switch, dikirimkan ke MC. Setelah diterima di sirkuit logic-nya dan diproses, maka selanjutnya MC mengirim keluar signal pengontrol ke motor EC, solenoid valve unit, torque control solenoid unit, dan sirkuit pengontrolan yang lain untuk mengatur engine, pompa-pompa, motor, dan valve-valve.

Input Signal

  • EC Sensor
  • Engine Control Dial
  • Pump 1 Control Pressure Sensor
  • Pump 2 Control Pressure Sensor
  • Pump 1 Delivery Pressure Sensor
  • Pump 2 Delivery Pressure Sensor
  • Pump 3 Delivery Pressure Sensor
  • N sensor
  • Pressure Sensor (Travel)
  • Pressure Sensor (Front Attachment)
  • Pressure Sensor (Swing)
  • Pressure Sensor (Boom Raise)
  • Pressure Sensor (Arm Roll-In)
  • Pressure Sensor (Auxiliary)
  • Hydraulic Oil Temperature Sensor
  • Auto-Idle/Acceleration Selector
  • Power Digging Switch
  • Power Mode Switch (HP/E/P)
  • Travel Mode Switch (Fast/Slow)
  • Work Mode Switch (Digging/Attachment)
  • Learning Switch
  • Key Switch
  • Boom Angle Sensor (Sampai serial No.104908,ZAXIS225US)
  • Auxiliary Mode Switch (Optional).

Output Signal

Pengontrolan Engine (EC Motor)

  • Engine Control Dial
  • HP Mode Control
  • E Mode Control
  • Auto-Idle Control
  • Auto-Acceleration Control
  • Auto-Warming Up Control
  • Idle Speed-Up Control
  • Engine Speed Automatic Increase Control at Travel (ZX270 class only)
    • Attachment Operation Speed Increase Control
    • Attachment Operation Speed Limit Control
  • Engine Learning Control.

Torque Control Solenoid Valve

  • Speed Sensing Control
  • Slow Speed Torque Increase Control
    • Pump 1 Flow Rate Limit Control
    • Pump 2 Flow Rate Limit Control
    • Pump 3 Torque Decrease Control.

Solenoid Valve Unit

  • Power Digging Control
  • Arm Flow Rate Control
  • Arm Regenerative Control
  • Travel Motor Swash Angle Control
  • Auto-Power Lift Control
    • Auxiliary Flow Rate Control.

Pengontrolan yang Lainnya

  • Boom Electronic Cushion Control (Sampai dengan serial No.104908 (ZAXIS225US))
  • Work Mode Control
    • Travel Alarm Control
    • Overload Alarm Control.

Image source: rockanddirt.com

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