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proper valve and sensor arrangement the fuel supply transition can be made while in operation, under
full load, and automatically.
NG/VPG is WP10GNA standard configuration. With added on option, WP10GNA can also support LPG,
manual or automatic switching.
TELEMATICS SUPPORT
Hardware and software capability exist in the full authority 4G control system to send and receive CAN
communication files in a structured message format. The input and output file structure and variable
content need to be defined by the customer and implemented by WEICHAI. There will be an
engineering change associated with setting up the file structures and debugging the communications
with the telematics module. Equipment and technical support is available from Weichai.
Diagnostic Messages
The 4G engine control system contains a highly configurable diagnostic list that can be tailored to each
application’s specific needs using the c
alibration spreadsheet. With each available P-code listed along
with the short-name description. Note that not all DTCs necessarily apply to every application.
ECM: Engine Control Module: 4G 120 pin
The ECM is full authority, by this we mean it includes the ignition and air/fuel ratio control, contains all
the I/O to interface the engine with the application and has a complete set of diagnostics. By
implementing all functions in one box the overall system complexity is reduced as is the total system
cost.
Some of features included in the ECMs are lean burn or stoichiometric combustion control, continuous
fuel injection control or standard digital injectors, ignition control electronic boost control for
turbochargers
–
VGT or wastegate, drive-by-wire throttle control, oxygen sensor based closed-loop
air/fuel ratio control (wide band (UEGOs) or switching (HEGOs)), adaptive spark and fuel control, EGR
control, transmission / engine coordination, speed control/governing (idle, max speed, all-speed, cruise
control) and vehicle network interface systems (CAN, J1708, J1850, Ford SCP).
DEPR: Direct Acting Electronic Pressure Regulator
Our fuel control device is referred to as a Direct Acting Electronic Pressure Regulator or D-EPR shown in
Figure 2. Its benefits to our customers and the end customer are:
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