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A fuel control system for supplying metered quantities of fuel from a fuel supply (11), through a fuel pump (13), a metering valve (15) and a pressurizing valve (17) to a plurality of engine fuel manifolds (31a, 31b, 33) includes an ecology valve (43) for withdrawing fuel from the engine fuel manifo

A fuel control system for supplying metered quantities of fuel from a fuel supply (11), through a fuel pump (13), a metering valve (15) and a pressurizing valve (17) to a plurality of engine fuel manifolds (31a, 31b, 33) includes an ecology valve (43) for withdrawing fuel from the engine fuel manifolds (31a, 31b, 33) during cessation of engine operation and for returning fuel to the engine fuel manifolds (31a, 31b, 33) to be burned during normal engine operation. The ecology valve (43) includes a valve housing (44) having a plurality of ecology ports (50, 52, 54) adapted to be coupled to corresponding ones of the engine fuel manifolds (31a, 31b, 33) and a control port (46) adapted to be connected to a corresponding control port (45) of the fuel pressurizing valve (17). A movable piston (63) is supported within the valve housing (44) for reciprocable motion and divides the interior of the valve housing (44) into a variable volume control chamber (71) coupled to the control port (46) and a variable volume fuel reservoir (55) which is selectively coupled to and uncoupled from the ecology ports (50, 52, 54) by the piston (63). Fuel is withdrawn from the manifolds (31a, 31b, 33) seriatim. A fuel flow dividing arrangement is located intermediate the pressurizing valve (17) and the engine fuel manifolds (31a, 31b, 33) for distributing appropriately fuel flow among the manifolds and includes a concatenated pair of two-way splitter valves (39, 41) comprising a first splitter valve (39) distributing the fuel flow between an atomizer nozzle manifold (31b) and the remaining manifolds (31a, 33), and a second splitter valve (41) distributing down stream fuel flow from the first splitter valve (39) between upper and lower manifolds (31, 33).

대표청구항 ▼

1. A fuel control system for supplying metered quantities of fuel from a fuel supply, through a fuel pump, a metering valve and a pressurizing valve to a plurality of engine fuel manifolds including an atomizer nozzle manifold, an upper air blast nozzle manifold and a lower air blast nozzle manifold

1. A fuel control system for supplying metered quantities of fuel from a fuel supply, through a fuel pump, a metering valve and a pressurizing valve to a plurality of engine fuel manifolds including an atomizer nozzle manifold, an upper air blast nozzle manifold and a lower air blast nozzle manifold, an improved fuel flow dividing arrangement intermediate the pressurizing valve and the engine fuel manifolds for appropriately distributing fuel flow among the plurality of engine fuel manifolds comprising:a concatenated pair of two-way splitter valves comprising a first splitter valve distributing the fuel flow between the atomizer nozzle manifold and the remaining air blast manifolds, and a second splitter valve distributing the down stream fuel flow from the first splitter valve between the upper and lower nozzle manifolds.