Method and apparatus for dosing a gaseous fuel

Internal-combustion engines – Charge forming device – Gaseous fuel and air mixer

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123472, F02D 4100, F02M 2102

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active

058030573

ABSTRACT:
A method and apparatus for supplying a gaseous fuel to a combustion engine is described. A required fuel flow is calculated, an actual fuel flow is measured, and a fuel flow control signal is adapted if a difference between the required and actual fuel flow is detected. The fuel flow may be measured using a differential pressure measurement. The fuel flow control signal and associated actual fuel flow may be stored in a continuously updated memory. The apparatus includes a pulse width modulation valve arranged in a fuel line, a fuel flow measurement assembly arranged downstream of the valve, and a device for generating a control signal for the valve. The control signal generating device is supplied with feedback from the flow measurement assembly and includes a continuously updated table for storing control signals and associated fuel flows.

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Angerhofer, "Cryogenic Instrumentation", Control Engineering, vol. 112, No. 11, Nov. 1, 1965, p. 77.

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