COMPONENT OPERATION / Pump Device
T3-1-6
Regulator Control Function
Regulator has the following three control functions.
•
Control by Pump Control Pressure
The pump flow control valve inside the control valve
controls pump control pressure (Pi1 - Pi2) in
response to the operating stroke of the control lever.
The regulator increases or decreases the pump
delivery flow in response to the pressure by
receiving this pump control pressure (Pi1 - Pi2).
When the control lever is operated, pump control
pressure (Pi1 - Pi2) lowers, and the regulator
increases the pump delivery flow. If the control lever
is returned to neutral, pump control pressure (Pi1 -
Pi2) rises, and the regulator decreases the pump
delivery flow.
•
Control by Own Pump Pressure
Own pump pressure Pd1 enters the regulator. In
case this pump pressure exceeds the set P - Q line,
the pump delivery flow is decreased and the
pressure returns to the P - Q line.
•
Control by Pilot Pressure from Torque Control
Solenoid Valve
MC (main controller) makes arithmetic operations of
the operating conditions of the vehicle body, and
transmits the signals to the pump torque control
solenoid valve in order to obtain required pump
torque.
The pump torque control solenoid valve transmits
pump torque control pressure ST corresponding to
this signal to the regulator. The regulator decreases
the pump delivery flow by receiving the pilot
pressure.
Flow (Q)
Flow Rate Decrease
Pressure Increase
Pressure (P)
0
Flow (Q)
Pressure (P)
0
Flow (Q)
Pump Control Pressure (Pi1-Pi2)
0
Summary of Contents for ZW180
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Page 10: ...GENERAL Specification T1 1 2 Blank ...
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Page 56: ...SYSTEM Control System T2 1 14 Blank ...
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Page 116: ...SYSTEM ECM System T2 2 10 Blank ...
Page 128: ...SYSTEM Hydraulic System T2 3 12 Blank ...
Page 147: ...SYSTEM Hydraulic System T2 3 31 Blank ...
Page 150: ...SYSTEM Hydraulic System T2 3 34 Blank ...
Page 184: ...SYSTEM Electric System T2 4 34 Blank ...
Page 185: ...MEMO ...
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Page 195: ...COMPONENT OPERATION Pump Device T3 1 7 Blank ...
Page 212: ...COMPONENT OPERATION Control Valve T3 2 4 T4GB 03 02 003 1 2 3 4 5 7 8 9 10 11 7 6 ...
Page 214: ...COMPONENT OPERATION Control Valve T3 2 6 T4GB 03 02 003 1 2 3 4 5 7 8 9 10 11 7 6 ...
Page 226: ...COMPONENT OPERATION Control Valve T3 2 18 Blank ...
Page 232: ...COMPONENT OPERATION Control Valve T3 2 24 Blank ...
Page 248: ...COMPONENT OPERATION Steering Pilot Valve T3 4 6 Blank ...
Page 258: ...COMPONENT OPERATION Steering Valve T3 5 10 Blank ...
Page 274: ...COMPONENT OPERATION Pilot Valve T3 6 16 Blank ...
Page 282: ...COMPONENT OPERATION Pilot Valve T3 6 24 Blank ...
Page 299: ...COMPONENT OPERATION Ride Control Valve T3 8 5 Blank ...
Page 306: ...COMPONENT OPERATION Ride Control Valve T3 8 12 Blank ...
Page 348: ...COMPONENT OPERATION Drive Unit T3 9 42 Blank ...
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