Claims
- 1. A fuel control system for a two-shaft gas turbine engine used in a running vehicle and having a compressor, a compressor turbine coupled to said compressor through one shaft and a power turbine coupled to a load through the other shaft, said fuel control system comprising:
- compressor turbine speed detecting means for detecting the rotational speed (NG) of said compressor turbine;
- accelerator position detecting means for detecting the position (.alpha.) of an accelerator pedal;
- acceleration fuel setting means for producing a voltage signal (V.sub.AF) indicative of a fuel quantity for engine acceleration in response to the detection output of said compressor turbine detecting means;
- part load fuel setting means for producing a voltage signal (V.sub.SC ) indicative of a fuel quantity for engine part load in response to the two detection outputs of said compressor turbine speed detecting means and said accelerator position detecting means;
- first selection means for selecting one of said voltage signals produced by said two setting means to produce a first selection voltage signal (V.sub.MIS ) indicative of a fuel quantity for engine acceleration and engine part load;
- starting fuel setting means for producing a voltage signal (V.sub.SF) indicative of a fuel quantity for engine start in response to the detection output of said compressor turbine speed detecting means;
- deceleration fuel setting means for producing a voltage signal (V.sub.RF ) indicative of a fuel quantity for engine deceleration in response to the detection output of said compressor turbine speed detecting means;
- second selection means for selecting one of said three voltage signals produced by said first selection means, said starting fuel setting means and deceleration fuel setting means to produce a second selection voltage signal (V.sub.MAS ) indicative of a fuel quantity for engine acceleration, engine part load, engine start and engine deceleration;
- surge limit setting means for setting the surge limit of said compressor in response to the detection output of said compressor turbine speed detectiing means;
- pressure detecting means for detecting the pressure in said compressor;
- surging fuel limiting means for producing a voltage signal (V.sub.CDPL ) indicative of a minimum fuel quantity when the detection output of said pressure detecting means exceeds the surge limit output of said surge limit setting means;
- compressor turbine overspeed limiting means for producing a voltage signal (V.sub.NGL ) indicative of a minimum fuel quantity when the detection output of said compressor turbine speed detecting means exceeds a predetermined speed limit;
- power turbine speed detecting means for detecting the rotational speed (N.sub.P ) of said power turbine;
- power turbine overspeed limiting means for producing a voltage signal (V.sub.NPL ) indicative of a minimum fuel quantity when the detection output of said power turbine speed detecting means exceeds a predetermined speed limit;
- third selection means for selecting one of said voltage signals of said second selection means, surging fuel limiting means, compressor turbine overspeed limiting means and said power turbine overspeed limiting means, said third selection means producing a voltage signal corresponding to a minimum fuel quantity for limiting said overspeeds and said surge with priority over said second selection voltage signal when at least one of said voltage signals of said three limiting means is produced; and
- fuel feed means for controlling fuel quantity for said gas turbine engine in response to said third selection voltage signal.
- 2. A fuel control system according to claim 1, further comprising:
- temperature detecting means for detecting the temperature (T) of a combustion gas in said gas turbine engine; and
- overheat limiting means for producing a voltage signal (V.sub.TL ) indicative of a minimum fuel when the detection output of said temperature detecting means exceeds a predetermined temperature limit, said voltage signal of said overheat limiting means being applied to said third selection means to be selected.
Priority Claims (1)
Number |
Date |
Country |
Kind |
49-65785 |
Jun 1974 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 581,698 filed May 28, 1975, now abandoned.
US Referenced Citations (7)
Continuations (1)
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Number |
Date |
Country |
Parent |
581698 |
May 1975 |
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