3.7 Fuel System
Bi-Fuel
The 4G Engine Controls System has full engine software control authority, therefore switching from
Natural Gas (NG) to Propane (LPG/VPG) fuel is a software command from the operator console or a
switch input into the 4G ECM. Weichai WP06GNA engine is capable of operating in bi-fuel mode starting
from VPG/LPG and switching to NG after the NG pressure develops from operation. With the proper
valve and sensor arrangement the fuel supply transition can be made while in operation, under full load,
and automatically. NG/VPG is WP06GNA standard configuration. With added on option, WP06GNA 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.
30