Charles A Skarvan

US Patent:

57750890, Jul 7, 1998

Filed:

Dec 23, 1996

Appl. No.:

8/772704

Inventors:

Charles Anthony Skarvan - Indianapolis IN

Assignee:

Allison Engine Company - Indianapolis IN

International Classification:

F02C 900

US Classification:

60 3903

Abstract:

A pressure signal synthesis method is provided to accommodate failure of a pressure sensor in a gas turbine engine. The pressure signal is synthesized from the torque produced by the engine, and further determined from the corrected speed of a gasifier rotor and power turbine for a free-turbine engine configuration. The synthesized pressure signal may include a correction factor which accounts for the deviation of the engine from a nominal characteristic. This correction factor is determined during engine operation and periodically updated to account for changes in the deviation.

US Patent:

46930779, Sep 15, 1987

Filed:

Jul 18, 1986

Appl. No.:

6/886624

Inventors:

Charles A. Skarvan - Indianapolis IN
Stephen A. Fisher - Whitestown IN

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F02C 928

US Classification:

60 39282

Abstract:

A closed-loop engine control system is disclosed in which an engine is controlled to provide power to a load as a function of measured feedback torque. A programmable digital controller modifies the feedback torque by adding to it a synthesized correction torque provided by the product of the engine polar moment of inertia and the engine acceleration. The modified feedback torque is used for either closed-loop torque or horsepower engine control.

US Patent:

57750904, Jul 7, 1998

Filed:

Dec 23, 1996

Appl. No.:

8/774283

Inventors:

Charles Anthony Skarvan - Indianapolis IN

Assignee:

Allison Engine Company - Indianapolis IN

International Classification:

F02C 900

US Classification:

60 3903

Abstract:

A torque signal synthesis method is provided to accommodate torque measurements for a gas turbine engine. The torque signal is synthesized from gas pressure sensed at an engine station. The synthesized torque signal may include a correction factor which accounts for the deviation of the engine from a nominal characteristic. This correction factor is determined during engine operation and periodically updated to account for changes in the deviation. The synthesized torque signal may further be determined from the corrected speed of a gasifier rotor and power turbine of a free turbine engine configuration.