Fuel Charging and Controls

Fuel Charging and Controls-CNG









Compuvalve

The compressed natural gas (CNG) system computer is located in the combined metering valve and computer assembly referred to as the compuvalve. The compuvalve uses a speed density calculation and feedback loop to determine the required fuel quantity for the engines current demand. The computer selects the correct combination of injectors to deliver this flow. The correct mass of CNG is delivered through the metering valve to the supply manifold. This calculation is typically updated at every spark event. To carry out these functions, the computer utilizes input from several sensors and controls various devices.

NOTE: The CNG supply manifold and CNG supply lines are supplied as an assembly with the intake manifold.

Supply Manifold-CNG

The CNG supply manifold is mounted to the underside of the intake manifold and distributes the metered natural gas flow from the compuvalve to the intake supply lines.

Supply Manifold-Supply Lines

The CNG supply lines take the metered natural gas from the supply manifold and distributes it to each individual intake manifold runner.