Patent ID: 7395655

Claim:
A Hydromechanical regulator for controlling the flow of fuel injected into a turbomachine by means of a fuel feed unit ( 10 ), comprising a force balance ( 20 ) having a beam consisting of two arms ( 24 , 26 ), which beam can move about a pivot pin ( 22 ) under the action of at least a first force (F 1 ) applied by a drive rod ( 18 ) of the fuel feed unit via a first elastic member ( 28 ), and a rod ( 36 ) associated with a control piston ( 38 ) for applying, via a second elastic member ( 40 ), a force (F 4 ) opposing the first force to the beam of the balance so as to cause the fuel feed unit to open further during the transition from a first engine operating regime to a second engine operating regime, wherein the rod of the control piston is furthermore coupled to an on/off pneumatic valve ( 44 ) for switching between the first engine operating regime and the second engine operating regime and connected, on one side, to a reference pressure P 0 and, on the other side, via air orifices S 0 and S 1 , to a pressure P 3 on the output side of a high-pressure compressor of the turbomachine.