Engine Throttle And Power Mode Control - jcb JS300 Service Manual

Overview
1
The machine power output setting can be selected by the
operator by means of the hand throttle control 1. Rotation
of the control changes the no load engine rpm and output
from the main hydraulic pump.
The hand throttle control signal is input to the MECU 6. The
MECU responds to the signal value by controlling the
engine rpm and the current output to the hydraulic pump
power control proportional solenoid 5.
The MECU software incorporates a 'map' of pre-set engine
rpm and power control current values. These values
depend on the input value from the hand throttle control.
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Engine Throttle and Power Mode Control

6
5
Engine Throttle and Power Mode Control
2
Fig 10.
The MECU transmits the required engine rpm to the
engine ECU on the CANbus.
Note: The engine rpm display value 4 is the actual engine
rpm. This may not be the same as the engine rpm value
requested by the MECU.
The selected power output is displayed on the DECU 3 in
the form of a 'power band' bar graph 2. The display monitor
uses a message transmitted by the MECU on the CANbus
to display the applicable bars (from 1 bar to 8 bars).
9813/5100-1
Section C - Electrics
Engine and Power Control
3
4
C128310-C2.eps
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