Start-Up Control For a Compact Lightweight Turbine
OwnerGustavo Francisco Labalainventor
Life of this patent
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Abstract
In a turbo-engine system, oil is circulated by means of a positive-displacement pump directly driven by the output shaft. The pump output pressure is monitored to trigger fuel injection when the turbine reaches sufficient speed during the start-up sequence.
Claims9
A method for controlling the start-up sequence of a turbo-engine, said turbo-engine including:
- a rotary shaft and other moving parts,
- a combustion chamber for driving said rotary shaft and adapted for fuel to be injected therein,
- an oil circulation system for lubricating said moving parts, said system including an oil pump directly coupled to said rotary shaft for circulating the oil through said system under pressure,
- starter means for driving rotation of said rotary shaft during said start-up sequence and
- means for turning said starter means on upon initiation of said start-up sequence;
- said method comprising:
- monitoring said oil circulation pressure,
- deriving a logical signal indicative of whether said oil pressure is above or below a predetermined threshold and
- using said derived logical signal to trigger fuel injection into said combustion chamber during said start-up sequence in response to said logical signal exceeding the predetermined threshold.
A turbo-engine including:
- a rotary shaft and other moving parts,
- an oil circulation system for lubricating said moving parts, said system including an oil pump coupled to said rotary shaft for circulating the oil through said system under pressure,
- starter means for driving rotation of said rotary shaft during said start-up sequence,
- means for turning said starter means on upon initiation of said start-up sequence,
- a switch arranged to trip during said start-up sequence in response to the pressure of the oil in said system increasing above a predetermined threshold and
- means responsive to said switch tripping to trigger the fuel injection system on during said start-up sequence.
In a turbo-engine including a combustion chamber and means for injecting fuel into said combustion chamber a finite time after said turbo-engine is started, the use of means monitoring oil pressure in the turbo-engine to initiate fuel injection in response to the oil reaching a preset pressure in the turbo engine.
Dependencies are inferred from the claim text.