초록 ▼

Fuel flow to a gas turbine engine is controlled in response to power lever position and CDP. Fuel is supplied to the engine through three fuel flow regulating circuits which are in parallel. In one of these circuits there is a valve which establishes a minimum fuel flow which decreases with increasi

Fuel flow to a gas turbine engine is controlled in response to power lever position and CDP. Fuel is supplied to the engine through three fuel flow regulating circuits which are in parallel. In one of these circuits there is a valve which establishes a minimum fuel flow which decreases with increasing power lever advance. In a second circuit there is a valve which modifies fuel flow in response to CDP. In a third circuit there is a valve which modifies fuel flow in response to CDP and receives fuel from a valve which opens with increasing power lever advance. The fuel control system includes a low power sensitive torque motor which may be activated to increase the pressure drop across the three circuits whose flow thus increases proportionally. Normal engine operation is obtainable without the use of the torque motor which provides an interface to an electronic control unit which senses various engine and ambient parameters and activates the torque motor in order to modify fuel flow accordingly.

대표청구항 ▼

A fuel control for controlling fuel flow to a gas turbine engine in response to different engine power settings, comprising: three parallel fuel flow circuits between a common fuel input port and a common fuel output port, and means for maintaining constant fuel pressure between said input and outpu

A fuel control for controlling fuel flow to a gas turbine engine in response to different engine power settings, comprising: three parallel fuel flow circuits between a common fuel input port and a common fuel output port, and means for maintaining constant fuel pressure between said input and output ports, a first of said circuits including means providing a minimum fuel flow to the engine at a preselected minimum power setting, corresponding to a minimum engine operating level, said minimum flow decreasing in an inverse relationship to power setting, a second of said circuits including means providing fuel flow as a function of engine compressor discharge pressure, a third of said circuits including means for providing fuel flow which increases in direct relationship to the power setting and is a function of compressor discharge pressure.