3.4 e olss electronic control
12
E-OLSS Section 3.4 E-OLSS: Electronic E-OLSS: Electronic Control Control Section 3.4 Section 3.4
-
Upload
fauzan-subkhi -
Category
Engineering
-
view
144 -
download
2
Transcript of 3.4 e olss electronic control
E-OLSSSection 3.4
E-OLSS: Electronic ControlE-OLSS: Electronic Control
Section 3.4Section 3.4
E-OLSSSection 3.4
E-OLSS: Electronic Control
Pump Controller.
The controller receives the input signals, processed these internally and sends output signals to the TVC solenoid and ON/OFF solenoids.
Electrical Connector Blocks
E-OLSSSection 3.4
E-OLSS: Electronic Control
Input and Output Signals
E-OLSSSection 3.4
E-OLSS: Electronic Control
Electronic – OLSS (Pump Control System)
When load on the pump rises and the pressure rises, the pump
discharge amount is reduced and the engine speed is controlled so that it becomes close to the rated
speed.
Inputs1. Monitor panel.2. Speed sensor.3. Fuel throttle.4. PPC pressure switches.5. Engine controller
Outputs
1. TVC solenoid
E-OLSSSection 3.4
E-OLSS: Electronic Control
Working Mode SelectionThe combination of the 4 level working mode
and 3 level power set makes it possible to choose a pump absorption torque
corresponding to the nature of the work, so it is possible to use the engine more effectively
while also reducing fuel consumption
E-OLSSSection 3.4
E-OLSS: Electronic Control
PEMC System
(Pump and Engine Mutual Control System)
The PEMC system has total control over the pump and
engine outputs.
To give a higher level of both power and fuel economy.
E-OLSSSection 3.4
E-OLSS: Electronic Control
TVC and Swing Lock Prolix Switches
If there is a failure in the pump controller, the Prolix Switches can
be switch on to by-pass the controller. They can be activated
individually.
When the prolix switch to the TVC solenoid is on, a current is
supplied through a resistor, the signal becomes constant so the force pushing the TVC valve is
constant. There is no pump sensing.
The swing lock solenoid will receive a constant current, this will
release the swing brake all the time.
E-OLSSSection 3.4
E-OLSS: Electronic Control
Prolix Switch ON
If there is a failure in the pump controller, the Prolix Switch can be switch ON to switch to the resistor side,
by pass the controller.
When this is done the pump absorption becomes
constant. The TVC output is controlled
by the (Pe) pressure. There is no pump sensing.
E-OLSSSection 3.4
E-OLSS: Electronic Control
Travel Speed Selector Function.
To maintain the draw bar pull when traveling the Cut Off is canceled and main
relief is raised .
Travel speed is selected on the monitor panel. When high speed is selected the controller will energize the Travel Speed
Solenoid Valve.
E-OLSSSection 3.4
E-OLSS: Electronic Control
Swing Control Function.
Swing lock brake is applied when not swinging this
prevents drift.
When the swing lever is operated the PPC pressure switch sends a signal to the
controller that swing is in use.
Controller will release the swing brake by sending a
current to the Swing Parking Brake Solenoid valve.
Hydraulic release the park brake actuator.
If an abnormality should occur in the controller the swing
brake can be released by the Swing Lock Prolix switch.
When the Swing Lock Prolix switch is on the swing brake is
not canceled.
E-OLSSSection 3.4
E-OLSS: Electronic Control
Text
E-OLSSSection 3.4
E-OLSS: Electronic Control
End ofEnd of
E – OLSS: E – OLSS:
Electronic ControlElectronic Control
