F 350 4WD Super Duty V10-6.8L VIN Z Bi-Fuel (2001)
Fuel Delivery Valve Assembly: Description and Operation
NOTE: The descriptions and specifications contained were in effect at the time this information was approved for printing. Ford Motor Company
reserves the right to discontinue models at any time, or change specifications or design without notice and without incurring obligation.
Compuvalve
The Compuvalve electronically meters fuel according to demand and calculates spark advance for optimum driveability and emissions. A combination
of sensors and inputs are used to dynamically monitor the engine operating environment. Fuel is delivered through the low pressure hose into the fuel
rails and through the injector sleeves. Internal to the Compuvalve are the Fuel Absolute Pressure (FAP) sensor, the Fuel Rail Temperature (FRT)
sensor, the Manifold Absolute Pressure (MAP) sensor, and the Alternative Fuel Control Module (AFCM). The Compuvalve intercepts the base
vehicle fuel gauge signal and substitutes a signal from a float style sensor in the alternative fuel tank (LPG) or a fuel tank pressure sensor mounted on
the high pressure regulator (CNG). This allows the Compuvalve to display the alternative fuel level on the gasoline fuel gauge while in ALT mode.