Compuflow, CUSSONS’ microprocessor controlled gravimetric fuel meter, is a multi-function engine fuel flow measurement system. It is designed to be compatible with both automatic and manually controlled engine test systems and is suitable for a wide range of fuels; diesel, petrol, alcohol, etc.

Compuflow comprises three units; the Fuel Weighing Module, which is sited in the engine test cell, the Electrical Interface Unit and the Control and Display Unit, which for safety are located outside the engine test cell.

The fuel weighing module is internally divided by a horizontal partition. A fuel supply pipe from an external source enters the upper section of the module, and is taken through a solenoid valve to the lower section. Within the lower section of the fuel weighing module is an aluminium weighing container. Supported by a sensitive load cell, the container incorporates an externally suspended fuel flow assembly. The fuel flow assembly includes a fuel supply pipe and engine feed and return pipes. Recirculated fuel is returned to the weighing container through the fuel flow assembly, and enters the container above a baffle.

The baffle prevents vapour bubbles entering the engine fuel supply pipe. When weighing is in progress the solenoid valve is closed, and thus the weight of fuel used can be measured. When metering is not in progress, the valve regularly operates and the fuel level is kept above a pre-set datum.

THE COMPUFLOW RANGE
CAPACITY               FLOW RATE                       ENGINE POWER
(Kilograms)            (Grams per second)        (Kilowatts)
03                          From 015 - 10                Up to 120
10                          From 03 - 33                  Up to 400
30                          From 15 - 100                Up to 1200
100                        From 50 - 330               Up to 4000

The accuracy of the system is dependent upon the weight of fuel used and the time taken to use it. As an example, timing over a 30 second period will give an answer accurate to ±025% of reading or ±005% of the maximum recommended flow rate whichever is the greater. A smaller timescale or less fuel will result in slightly reduced accuracy.

¨ True Gravimetric System
¨ Specifically designed to allow for High Recirculating Fuel Flow Rates
¨ Two 4 figure Displays
¨ Weight or Flow Rate and Time, Total Engine Revolutions or Speed Display Selectable
¨ Analogue Output of all Displayed Parameters is available
¨ Fuel Measurement Quantity readily available over a Wide Range
¨ Safety – Explosion-proof Valve and Intrinsically Safe Circuits are used throughout
¨ Minimum Change of Head during tests
¨ 4 Models to suit Engines up to 4MW