Terex TA400 - Engine Management System (EMS); PDE Fuel Injection System - Description; PDE Fuel Injectors

Controls and Operating
3-31
PDE Fuel Injection System - Description
1. Engine Management System (EMS) - Receives electronic inputs
from the driver as well as from sensors that provide information
electronically, such as speed, oil pressure and temperature, boost
pressure and temperature and coolant temperature. This information is
used to control both the quantity of fuel injected and the injection
timing. The EMS is programmed to control the horsepower rating,
torque curve, maximum engine speed and engine protection devices.
The EMS processes this information and sends electronic signals to
the PDE Fuel System Injectors where the precise amount of fuel is
injected into the engine.
2. PDE Fuel Injectors - The engine is equipped with high pressure
(PDE) injectors that inject diesel fuel directly into the combustion
chamber. The amount of fuel injected and the beginning of injection
timing is determined by the engine control unit.
NOTICE: Never apply 12 or 24 volts directly to the terminals on the
injectors or engine sensors as they will burn out. Before removing
injectors, the fuel passages must be blown out to prevent fuel flow from
entering the cylinder head.
P
STOP
X14
X4
X36
X35
X34
S25
X44
5
3
7
4
MOT00306
6
2
1
1. Engine Management System
2. PDE Fuel Injectors
3. Electronic Foot Pedal
4. Engine Stop Light
5. Engine Check Light
6. Diagnostic Switches
7. Diagnostic Test Point
WARNING
Engine or electronic system
diagnosis must be done by a
person other than the opera-
tor. The operator must main-
tain control of the moving
machine while the assistant
performs the diagnosis.
The operator of the machine
must not attempt to use or
read an SDP3 of any kind while
the machine is operating.
Doing so can result in loss of
control, which may cause
machine damage and may
result in personal injury.
WARNING