초록 ▼

A fuel control system has a boost pump for pumping liquid fuel to a positive displacement pump, which in turn meters the fuel to a fuel nozzle of a combustion engine. The positive displacement pump is variably driven independently of the boost pump, and includes a pressure regulator for minimizing p

A fuel control system has a boost pump for pumping liquid fuel to a positive displacement pump, which in turn meters the fuel to a fuel nozzle of a combustion engine. The positive displacement pump is variably driven independently of the boost pump, and includes a pressure regulator for minimizing pressure difference across the pump.

대표청구항 ▼

A fuel control system for controllably supplying fuel from a fuel supply to a combustion engine, comprising first pump means for pumping liquid fuel from the supply at a pressure level at least equaling engine requirements; second pump means for metering the liquid pumped by said first pump means, s

A fuel control system for controllably supplying fuel from a fuel supply to a combustion engine, comprising first pump means for pumping liquid fuel from the supply at a pressure level at least equaling engine requirements; second pump means for metering the liquid pumped by said first pump means, said second pump means being for supplying the metered fuel directly to the engine; means for variably driving said second pump means at a speed responsive to engine fuel requirements and generally independent of said first pump means; and pressure control means connected across said second pump means for limiting the pressure difference across said second pump means to a relatively low, substantially constant level, said pressure control means including means for bypassing from said second pump means a portion of the liquid pumped by said first pump means.