Ingersoll-Rand HP1300WCU, Руководство по эксплуатации, техническому обслуживанию и каталог запасных частей

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Book 54757919 (5/02)
Controller Outputs:
The WEDGE controller has three different types of out-
puts: frequency, pulse width modulated (PWM) and 24
VDC digital (ON / OFF). The frequency output is used
as a throttle signal for the engine (software versions
less than 2.0).
The WEDGE controller varies the frequency from 150
Hz to 375 Hz, corresponding to 1200 to 1800 rpm. The
frequency signal is a 50% duty cycle, 24VDC, square
wave. This throttle signal is used with the Cummins en-
gine.
The PWM signal is used as a throttle signal for the
Caterpillar engine. It has a base frequency of 500 Hz
and the duty cycle varies from 10% to 90%.
Pressure Control
The discharge pressure is controlled by manipulating
the engine speed and compressor inlet valve position.
The inlet valve position is controlled pneumatically and
the engine speed is determined by the WEDGE con-
troller. The WEDGE measures the pneumatic system
regulation pressure and computes an engine throttle
setting. This throttle setting is sent to the engine via
the frequency throttle, PWM or J1939 throttle, depend-
ing on which technique is used. The engine controller
will control engine speed to this throttle setting.
Electronic Engine
The HP1600/1300 machine contains an emissions
certified diesel engine. In order to meet the emissions
requirements, the engine has an electronic control
system.
The control system handles all monitor, alarm and
control functions for the engine. The WEDGE control-
ler communicates with the engine controller over the
J1939 CAN network.
The WEDGE controller sends throttle settings to the
engine (software versions 2.0 and greater) and re-
ceives diagnostic and run time data from the engine
over the J1939 CAN network. A frequency throttle in-
terface with the engine is used for software versions
earlier than 2.0.
Figure 8--2 shows the connections between the
WEDGE controller and the engine controller.
J1939 Data Link -- The CAN network is a single pair
shielded cable within the W1 main harness. Figure
8--3 shows a layout of the CAN harness or “backbone”
as it is referred to. The termination resistors (Termina-
tor) are important to prevent reflections on the trans-
mission line and must be in place for the network to
function properly. The shield from the cable is con-
nected to the machine metal at the WEDGE controller
end.
The connection must be properly made with good met-
al to metal contact between the wire terminal and the
machine metal.
The engine diagnostics connector is located on the left
side of the engine. This is used to connect the engine
manufacturer’s service tools to the CAN network. This
connector also provides 24 VDC power to these ser-
vice tools.
Electrical System
The electrical system consists of the wiring harnesses
and associated electrical devices such as relays,
switches, lights, solenoids and alarm horn.
The electrical system consists of the wiring harnesses
and associated electrical devices such as relays,
switches, lights, solenoids and alarm horn. There are
two wiring harnesses in the HP1600 machine. They
are as follows:
54654918 W1 Chassis Main Wiring Harness
22060594 Control Panel Wiring Harness
The schematic diagrams show the connections for
these harnesses. Figure 8--1 is a system diagram
showing harness connection with devices and control-
lers.
The electrical circuits are protected using ATC style
fuses. A fuse should only be replaced with one of the
same rating. Replacing a fuse with one of a large rat-
ing could lead to harness damage. If a fault occurs and
the circuit does not have the appropriate size fuse,
wires could be burned in the harness and damage oth-
er circuits.