Power plants – Combustion products used as motive fluid – Combined with regulation of power output feature
Patent
1986-07-11
1996-05-07
Jordan, Charles T.
Power plants
Combustion products used as motive fluid
Combined with regulation of power output feature
F02C 928
Patent
active
055134939
ABSTRACT:
Fuel for the combustion equipment of the engine of a vertical take off aircraft is supplied via pumps 50,24 through a metering valve 22, which is under the control of a digital electronic control unit (DECU) 10. A pressure drop regulator 30 and spill valve 32 ensure there is a constant pressure drop across the metering valve 22. To provide a rapid reduction in fuel output when the aircraft pilot slams shut his control lever 16 when he touches down after a vertical landing, and therefore prevent the aircraft from bouncing, the DECU 10 detects the sudden slamming closed of the lever 16, and opens a solenoid valve 60. Fuel now bleeds along line 58, and the input 54 of the regulator 30 sees an increased pressure drop determined by a potentiometer formed by two flow restricting orifices 56,62. The regulator 30 therefore opens the spill valve 32 giving the desired rapid reduction in fuel flow through the metering valve 22.
REFERENCES:
patent: 3121456 (1964-02-01), McCathron et al.
patent: 4248040 (1981-02-01), Kast
patent: 4337616 (1982-07-01), Downing
patent: 5083277 (1992-01-01), Shutler
patent: 5345386 (1994-09-01), Mullen et al.
Severn Michael J.
Taylor Roy L.
Jordan Charles T.
Rolls-Royce plc
Wesson Theresa M.
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