Measuring and testing – Vehicle drive train – Rear end
Patent
1982-11-22
1984-08-21
Myracle, Jerry W.
Measuring and testing
Vehicle drive train
Rear end
731173, 318692, G01M 1500
Patent
active
044662785
ABSTRACT:
A system for transmitting an EPR (Engine Pressure Ratio) from a gas turbine is provided with a resolver component (30) which modifies the EPR in accordance with variations in the optimum EPR for a particular turbine under particular conditions. The information from an EPR gauge is transmitted by a synchro transmitter, and is received by a differential transmitter (31) associated with the particular engine being monitored. The differential transmitter (31) is adjusted in accordance with pressure (at 33) and temperature (at 56) conditions in order to provide an EPR reading which is compensated in accordance with actual conditions of pressure and temperature. The differential transmitter (31) is also adjusted (at 45) in order to provide an output which is further varied in accordance with a variation in the optimum EPR under standard conditions for the particular turbine associated with the differential transmitter. The signal from the differential transmitter (31) is used to provide an EPR indication which is artificially changed in order to closely approximate a nominal optimum reading under various conditions of pressure and temperature and despite variations in the performance characteristics of the particular engine associated with the EPR reading. Therefore, the EPR reading being provided by the system is compensated in order to provide an indication of maximum efficiency at a fixed nominal value which is the same for each turbine installed on the aircraft under a wide variety of conditions.
REFERENCES:
patent: 2700745 (1955-01-01), Depp et al.
patent: 2874541 (1959-02-01), Oberlin
Tate, J. D., Using Selsyns for Remote Control and Data Transfer from Instruments and Control Systems, Sep. 1972, pp. 83, 84.
Myracle Jerry W.
Protigal Stanley N.
The Bendix Corporation, Flight Sys. Div.
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