Fuel metering apparatus

Details Fuel metering apparatus Fuel metering apparatus

1982-07-19

1983-12-20

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

123455, 123458, 123459, F02D 104, F02M 3900

Patent

active

044210892

ABSTRACT:
A fuel/air ratio control apparatus for a reciprocating engine used in light aircraft including a fuel metering apparatus (32) and an electronic fuel/air ratio control (39). The control (39) generates an electrical signal (Wf/Wa) indicative of a desired fuel/air ratio based upon the flight condition of the aircraft and the metering apparatus (32) meters fuel flow (Wf) according to the mass airflow (Wa) ingested by the engine. The fuel metering apparatus (32) positions a metering valve (348) by means of a force balance of opposing forces developed by an air diaphragm (330) and a fuel diaphragm (336). The fuel diaphragm (336) is subjected to the differential pressure of a metering head pressure (Pu) and a fuel output pressure (Pm). The output pressure (Pm) is regulated by a controlled orifice (343) influenced by a proportional solenoid (406) whose armature valve (341) is positioned by the electrical signal (Wf/Wa).

REFERENCES:
patent: 3999527 (1976-12-01), Wessel et al.
patent: 4075995 (1978-02-01), Kramer
patent: 4161933 (1979-07-01), Stumpp
patent: 4207849 (1980-06-01), Sumiyoshi et al.
patent: 4228777 (1980-10-01), Haase
patent: 4294213 (1981-10-01), Sumiyoshi et al.
patent: 4364361 (1982-12-01), Eckert

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