Shop manual máy đào HuynDai R250: An toan, cấu trúc, sơ đồ điện, thủy lực,
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GROUP 3 AUTOMATIC DECELERATION SYSTEM
=P—
Fuel injection
pump
Auto Deoel
@ Auto decel switch signal
Accel actuator
1 WHEN AUTO DECEL LAMP ON
CPU controller
Work equipment
pressure switch Travel oil pressure switch
Main control valve
Pressure switch signal
Accel dial signal
(2
we
Oo
Accel dial OQ
21075MS04
If all the work equipment control levers including swing and travel levers are at neutral for at least 4 seconds, CPU controller drives the governor motor to reduce the engine speed to 1200rpm As the result of reducing the engine speed, fuel consumption and noise are effectively cut down during non- operation of the control levers
When the Auto decel lamp is turned off by pressing the switch or any control lever is operated, the reduced engine speed rises upto the speed set before deceleration in a second
Accel dial set rpm
1200 rpm
2 WHEN AUTO DECEL LAMP OFF
The engine speed can be set as desired using the engine speed switch, and even if the control levers are neutral, the engine speed is not reduced
Note : Auto decel function can be activated when accel dial position is over 4
5-6
21075MS05