초록 ▼

An acceleration limit reset circuit (38, 40, 42, 44) is disclosed for a closed loop fuel control (11) of a gas turbine engine (10). The closed loop control includes a comparator circuit (28) which compares an acceleration term Ngs-Nd to a limit value Al and if the scheduled acceleration (Ngs-Nd) is

An acceleration limit reset circuit (38, 40, 42, 44) is disclosed for a closed loop fuel control (11) of a gas turbine engine (10). The closed loop control includes a comparator circuit (28) which compares an acceleration term Ngs-Nd to a limit value Al and if the scheduled acceleration (Ngs-Nd) is in excess of the limit, regulates the rate of change of the engine speed to the limited value Al. The acceleration limit Al is scheduled by an accel/decel limiter circuit (30) as substantially equivalent to the surge line of the engine. The acceleration limit reset circuit (38, 40, 42, 44) is provided for modifying the acceleration limit Al during special operating conditions of the engine (10) by a signal RRS.

대표청구항 ▼

An acceleration limit reset means for a fuel control of a two-spool gas turbine engine during mismatched spool speeds including means for generating an acceleration limit, said reset means characterized by: means for generating a high spool speed signal proportional to the actual speed of the high p

An acceleration limit reset means for a fuel control of a two-spool gas turbine engine during mismatched spool speeds including means for generating an acceleration limit, said reset means characterized by: means for generating a high spool speed signal proportional to the actual speed of the high pressure compressor; means for generating a low spool speed signal proportional to the actual speed of the low pressure compressor; means, receiving said high and low spool speed signals, for generating a multiplication factor as a function of said high and low spool speed signals; and means for multiplying said acceleration limit by said factor.