Importance

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Abstract

A fuel control system for use with a source of pressurized fuel includes housing structure defining an inlet, an outlet, a check valve chamber and a regulating valve chamber disposed between the inlet and outlet structures. Check valve structure is disposed in the check valve chamber for preventing liquid fuel from reaching the outlet structure, and control valve structure is disposed in the regulating valve chamber. The control valve structure includes diaphragm structure dividing the regulating valve chamber into a downstream chamber open to atmospheric pressure and an upstream chamber on the opposite side of the diaphragm structure that is in communication with the check valve chamber. Regulator valve structure is coupled to the diaphragm structure for movement between a first position in which the valve passage is open to permit flow of fuel from the check valve chamber to the outlet structure and a second position in which the valve passage is closed; and includes adjustment structure for shifting the regulator valve structure relative to the diaphragm structure for changing the pressure on the diaphragm structure that will cause the regulator valve structure to move between the first and second positions.

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First Claim